Search

The interest in bio-based polymer composites is brought about by the quest for sustainable environmentally friendly materials due to the rapid depletion of petroleum resources and the desire to find solutions to environmental pollution because of synthetic composites. The purpose of this work was to study the effect of various treatments on the performance and potential use of hybrid barkcloth-banana fiber-reinforced polyester resin biocomposites particularly for interior automotive applications. Two categories of biocomposites were prepared: (1) untreated banana fibers and barkcloth, denoted by A1, B1, C1, D1, and (2) 5% sodium hydroxide (NaOH) treated banana fibers and barkcloth with nano-cellulose denoted by A, B, C, and D. Banana fibers were soaked in the alkali solution for 12 h, nanocellulose was extracted from the barkcloth using the acid hydrolysis method and applied to the barkcloth fabrics by the pad-dry-cure method with a concentration of 1% nanocellulose. The treated barkcloth had better bonding capacity with the resin and was thermally stable than the untreated barkcloth. In contrast, the alkali treatment of banana fibers led to fiber degradation, making them brittle and consequently reducing their tensile and bending strength. The mechanical properties of both composites showed that sample D1 had the best tensile and flexural strength attributed to the fact that it was based on the untreated banana fibers as opposed to the degraded alkali-treated banana fibers. [ABSTRACT FROM AUTHOR]

Background: Ingestion of corrosive chemicals is a major problem, especially in developing countries. Ingestion may be deliberate as suicide attempts (mostly in adolescents and adults) or accidental (mostly in children).Case presentation: A 50-year-old male patient was brought to the APC – he was suffering from vomiting following ingestion of NaOH. On examination: he complained of severe dysphagia, drooling, hoarseness of voice, severe pain, and a burning sensation in his mouth. The vital signs were heart rate of 100 beats /minute, blood pressure 140/90 mmHg, temperature 37°C, respiratory rate of 26/min, and GCS was 15. The patient was stabilized on intravenous treatment and NBO. Follow-ups were carried out for all vital signs, and laboratory tests were carried out, with an initial improvement in his condition. After 6 days, the patient vomited vigorously, and tissues extruded from his mouth, where a complete sloughing of esophageal mucosa occurred. The patient was transferred to the cardiothoracic department where they decided to maintain conservative treatment and NBO for 2 weeks. Later, the patient was prepared for gastrostomy followed by colon transposition. The patient improved and was discharged with a follow-up regimen.Discussion: Esophagitis Dissecans Superficialis (EDS) is a rare esophageal lesion characterized by sloughing of the esophageal mucosa, there is limited information on EDS resulting from corrosive poisoning. Endoscopy was not performed for fear of perforation and CT was carried out instead of endoscopy. Patients usually have an excellent response to treatment, with proton pump inhibitors and steroids. These are the same management lines that followed before surgical intervention. The surgeons perform an esophagectomy and colonic transposition on the patient to avoid stricture in the future. This is considered an acceptable treatment. Conclusion: Clinical toxicologists should be expecting esophageal sloughing as one of the corrosive ingestion complications within a week of ingestion.

Abstract Radiolarians have been used to determine geological ages and have contributed markedly to our understanding of Earth’s history. Hydrofluoric acid (HF) has traditionally been used to extract radiolarian fossils from siliceous deposits (i.e., radiolarian cherts), but this acid is strictly regulated because of environmental and human health concerns. Here we report on the successful extraction of radiolarians from cherts using a low-concentration NaOH solution (1 mol/L NaOH) as an alternative to HF. The degree of chert dissolution in NaOH is strongly temperature-dependent and is limited at

The environmentally friendly properties of natural fibers cause their use as reinforcement in polymer matrices to continue to grow. However, its hydrophilic properties can significantly reduce interfacial interactions. Chemical treatment is one method used to reduce the hydrophilic nature of ramie fibers. This study aimed to investigate the effects on ramie fiber of three chemical treatments: oxalic acid at a concentration of 5 (wt.%), sodium hydroxide at 3, 5, and 7 (wt.%), and a combination of both treatments. Physical properties, moisture content, tensile strength, X-ray diffraction, Fourier transform infrared spectroscopy (FT-IR), thermal properties, contact angle, and morphology of ramie fibers before and after treatment were observed in this investigation. FT-IR test results showed a partial loss of amorphous content and more intense cellulose peaks in treated ramie fibers. The combination treatment of alkali and oxalic acid gave the best results, which initiated the dissolution of some of the lignin, hemicellulose, and extractive content. XRD results indicated the surface treatment also led to a 20.35% rise in the crystalline index. In addition, there was a significant increase in tensile strength of 136.10 % in fibers soaked with chemicals. The morphology of the fibers with treatment showed defibrillation and loss of contaminants on the fiber surface, which was the cause of the smaller fiber diameter. Therefore, this optimum treatment is expected to improve the interfacial properties of natural fibers and polymer matrices so that they can enhance the properties of composites when applied in industries.

Abstract Waste from construction and demolition (also known as CDW) is one of the most harmful environmental issues. This study's primary goal is to produce new mortar and brick materials from recycled concrete powder (RCP) and recycled brick powder (RBP), two of the most popular CDW. Geopolymeric mortar and brick samples were produced by passing RCP and RBP through sieve No. 50 (with sand filler if necessary) and combining them with an alkaline solution made of water glass (WG) and NaOH. In this study, the mixture was then cured for three days at 80 °C in an oven. The effects of filler, RBP amount, WG amount, and the concentration of NaOH alkaline solution on the samples’ strength were examined. Additionally, XRF and SEM/XRD tests were performed to verify the materials' composition and microstructure. The mechanical strength of the samples showed an increase with the increase of RCP values, so the brick sample with filler showed the highest compressive strength, measuring 59.53 MPa. The study's samples exhibited strong mechanical properties. Additionally, all of the bricks' water absorption fell within the standard range. In summary, according to different standards, both waste concrete and waste brick can be used to produce geopolymer materials especially bricks for construction and paving purposes.

Natural fibers are a sustainable alternative to synthetic fibers due to their high weight‐specific Young's moduli and strengths. However, the mechanical properties of natural fibers are very sensitive to their moisture content. Therefore, chemical treatments are often applied to natural fibers to lower their water absorption and enhance fiber‐matrix interaction. The aim is to study the effects of fiber modifications with sodium hydroxide, silane, and siloxane on the water uptake and tensile properties of flax fiber composites produced via prepreg technology. In addition, the effect of moisture on the composites' tensile properties was investigated by conditioning one part of the tensile specimens according to DIN EN 2823 (at 70°C and 85% relative humidity). The NaOH treatment was the only modification that had positive effects on the Young's modulus and tensile strength in the unconditioned and conditioned state. The increase of the tensile modulus and strength are most likely due to changes in flax fiber composition, crystallinity of the cellulose and the rougher fiber surface of NaOH modified fibers. This shows that chemical treatment of natural fibers may improve the performance level of natural fiber composites and prevent a loss in their mechanical properties in humid environments. Highlights: Flax fiber modifications with sodium hydroxide, silane, and siloxane.Flax fiber composite production via prepreg technology.Water uptake after conditioning at 70°C and 85% relative humidity.Tensile tests before and after conditioning.SEM images of modified flax fibers. [ABSTRACT FROM AUTHOR]

Magnetite (Fe3O4) particles deposited with zeolite, which was made from sodium hydroxide (NaOH), sodium aluminate (NaAlO2) and sodium trisilicate (Na2O7Si3) using the hydrothermal process, were used in the adsorption of methylene blue (MB). A continuous stirred tank reactor (CSTR) system was used for the adsorption of MB using zeolite/Fe3O4. This study encircled the continuous reactor with a magnet to prevent the adsorbent from flowing to the output, thus producing clean water devoid of Fe3O4 particles. The performance of the adsorbent was assessed based on the effects of adsorbent mass, flow rate, pH and concentration. The adsorbent was able to remove approximately 90% of the 20 mg L−1 methylene blue from a 500 mL solution in 2 h, with a maximum adsorption capacity of 30.8528 mg g−1. This adsorption process also exhibited high removal efficiency even after 5 regeneration cycles and 55 h of operation, confirming the successful production of zeolite/Fe3O4 as an effective MB adsorbent. [ABSTRACT FROM AUTHOR]

Oak bark is a by-product known for its richness in polyphenols, with tanning substances being particularly interesting for their application in different fields. Vegetable tannins are mostly utilized in the leather sector, but are also widely used as adhesives, in cement plasticizers and for medical and agrochemical applications owing to their natural antimicrobial activity. This study aimed to develop a green and efficient pilot-scale technique for extracting polyphenols from oak bark by ultrasound-assisted extraction (UAE) using a modified Dual-Frequency Reactor (DFR). Different parameters, such as extraction time, temperature, and solvent type (water, sodium hydroxide or sodium sulfite and bisulfite solutions) were investigated for their influence on the total phenolic content (TPC) and the quantity of dry extract. Control experiments by conventional methods were also performed. UAE at 50 °C yielded the highest TPC and dry extract (confirmed by ANOVA analysis, p < 0.05) in just 10 min, suggesting that UAE can be considered an energy- and cost-effective alternative to conventional techniques. The most suitable solvent was found to be a 0.5% sodium hydroxide solution. The molecular profile of the extracts was assessed by FTIR-ATR spectroscopy, revealing typical signals of tannins in all extracts. Furthermore, antimicrobial activity tests demonstrated the complete absence of Gram-positive and Gram-negative bacteria in the extracts, ensuring the suitability of the product for different kinds of application. [ABSTRACT FROM AUTHOR]

This research investigates the impact of solution concentration and solution-to-binder ratio (S/B) on the volume changes in alkali-activated slags with sodium hydroxide at 20 °C. Autogenous and thermal strains are monitored with a customized testing device in which thermal variations are controlled. Consequently, both the autogenous strain and coefficient of thermal expansion (CTE) are determined. Heat flow and internal relative humidity (IRH) are also monitored in parallel, making this research a multifaceted study. The magnitudes of autogenous strain and CTE are higher than those of ordinary Portland cement paste. Decreasing the solution concentration or S/B generally decreases the autogenous strain (swelling and shrinkage) and the CTE. The shrinkage amounted to 87 to 1981 µm/m, while the swelling reached between 27 and 295 µm/m and was only present in half of the compositions. The amplitude of the CTE, which increases up to 55 µm/m/°C for some compositions while the CTE of OPC remains between 20 and 25 µm/m/°C, can be explained by the high CTE of the solution in comparison with water. The IRH of paste cannot explain the autogenous strain's development alone. Increasing S/B eliminates the self-desiccation-related decrease. [ABSTRACT FROM AUTHOR]

Geopolymers can act as a facile forming route to aluminosilicate ceramic composites due to being processed as fluids rather than as powders. However, the compositions available via typical alkali geopolymers are limited by the presence of alkali cations, introduced by the alkali silicate solution precursors. In order to expand the ceramic compositions that are accessible by geopolymer processing, this study explored the use of three strong organic bases (guanidine, tetramethylguanidine [TMG], and tetramethylammonium hydroxide [TMAOH]) as alternatives to inorganic alkali hydroxides in geopolymer synthesis. Silicate solutions were able to be produced with all three bases and favorable silica speciation was identified in the guanidine and TMG silicate solutions. Monolithic bodies were produced using guanidine and TMAOH, while no TMG samples hardened. By 27Al and 29Si nuclear magnetic resonance spectroscopy and powder X‐ray diffraction, the guanidine samples were determined to be structurally similar to those made using sodium hydroxide and hence can be called geopolymers, while the solids made with TMAOH were not structurally similar to sodium geopolymers and contained one or more unknown phases. This study has demonstrated that geopolymers can be made using organic bases rather than alkali hydroxides and that the speciation of dissolved silica alone does not indicate that an organic base silicate solution will be reactive. [ABSTRACT FROM AUTHOR]

Ductile iron (DI) samples were immersed in near-neutral, alkaline sodium hydroxide (NaOH), and sodium chloride (NaCl) environments for 180 days. The influence of microstructure on the corrosion resistance of three DI specimens was investigated. Microstructures, electrochemical measurements, and the characterization of the corroded surfaces were analyzed. The experimental results from this study were used to validate a model generated from hybrid adaptive neuro-fuzzy inferences system-particle swarm optimization (ANFIS-PSO) algorithms. The hybrid ANFIS-PSO modelling technique was improvised for a detailed evaluation of corrosion rate of ductile cast iron materials in different environments. The integrated hybrid ANFIS-PSO model revealed a sharp rise in localized corrosion caused by chloride-induced structural deterioration at the nanoscale for some of the grains. The performance results revealed that the fuzzy c-mean (FCM) clustering outperformed other clustering approach in the neuro-fuzzy model. Accuracy values of 92.9% and 93.7% were recorded for the training phase of ANFIS-FCM and ANFIS-PSO-FCM respectively for corrosion rates. The percentage error of the ANFIS-PSO predictions is significantly lower than the ANFIS-standalone prediction. This shows that the ANFIS-PSO with FCM approach is a better model for predicting corrosion rates. This will contribute to the body of knowledge for ductile iron, corrosion, and corrosion modelling using machine learning. [ABSTRACT FROM AUTHOR]

Model reaction of the formation of aliphatic polyureas—the reaction of O-methyl-N-methylcarbamate with methylamine was studied at the M06 and B3LYP levels. Concerteted non-catalytic nucleophilic substitution reactions involving a monomer and dimer of methylamine proceed through large free energy barriers. Non-catalytic reactions with a monomer or dimer of methylamine proceed according to the "addition–elimination" pathway, the stages that determine the reaction rate are the formation of a tetrahedral intermediate. They also have large free energy barriers. Catalysis with zinc acetate, phenol, and 1,4-diazabicyclo[2.2.2]octane does not significantly change the energy barrier. A sharp decrease in activation barriers to the reaction occurs during catalysis with sodium hydroxide and sodium methoxide. [ABSTRACT FROM AUTHOR]

The global gold ore grade has been decreasing, and the mineralogy is now more diverse and complex. This has necessitated the utilization of low-grade ores previously not used. During the cyanidation process of such ores, copper cyanide complexes form that are competitively adsorbed with gold onto activated carbon. Therefore, to decrease the amount of copper in the pregnant electrowinning electrolyte, a series of copper adsorption experiments were done to limit the amount of copper that adsorbs onto activated carbon. Tests on selective copper cold stripping were also conducted to selectively elute copper from loaded head carbon before the elution process. The results showed that increasing the solution pH from 9 to 11 decreased the copper adsorption from about 15.1% to 8.2%, but on the other hand the gold adsorption decreased from 98.7% to 95.1%. The optimal determined cold stripping parameters were 2% cyanide strength, 1% sodium hydroxide, 27 g/L carbon concentration and 4 h residence time. This experimental procedure effectively reduced the amount of copper in the gold leaching process and has potential to be used in large-scale applications. [ABSTRACT FROM AUTHOR]

There is a demand for innovative construction materials that offer enhanced mechanical characteristics while also being cost-effective and environmentally friendly. This paper examines the fresh properties and mechanical properties of geopolymerized self-compacting concrete (SCC) reinforced with steel fibers, containing 0–100% metakaolin (MK) by mass, as an eco-friendly substitute for Portland cement. SCC combinations included one or more waste cementitious materials (WCMs), such as metakaolin (MK), NaOH as an alkaline activity, and double-hook end steel fibers. For every NaOH geopolymer SCC blend, the mechanical characteristics (compressive strength, splitting tensile strength, flexural strength), as well as the new properties (lump flow, V-Funnel, L-box test), were read up. The findings indicate that combining metakaolin and steel fibers reduces the flowability of NaOH-based geopolymer SCC. On the other hand, incorporating MK and steel fibers enhances the compressive and flexural strength of NaOH-based geopolymer SCC with 25% metakaolin and 0.3% steel fiber. In contrast to the fiber-reinforced NaOH-based geopolymer SCC samples, which could transfer a sizable load even when the crack mouth opening deflection rose at flexural strength, the fiber-free SCC samples showed a brittle and abrupt fracture. The findings showed that the addition of NaOH as an alkaline activator, MK, and steel fiber had a negative impact on the fresh state properties; however, their combined use greatly enhanced the bond strength and flexural performance of the NaOH geopolymer SCC specimens. [ABSTRACT FROM AUTHOR]

Copyright of Baghdad Science Journal is the property of Republic of Iraq Ministry of Higher Education & Scientific Research (MOHESR) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Inorganic Chemicals Industry is the property of Editorial Office of Inorganic Chemicals Industry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This article investigates the effects of mixing different alkaline electrolytes on the geometrical features created by the ECDM. Sodium hydroxide (NaOH) and potassium hydroxide (KOH) were mixed in varying volumetric proportions. Effect of critical process parameters on the depth and width of the microchannels and the associated tool wear was investigated. Pure NaOH electrolyte has resulted in the highest depth compared to the pure KOH electrolyte. Process mechanism behind the role of mixed electrolytes on the opening sizes and depths of microchannels is explained. Higher material removal by the NaOH electrolyte was due to the larger number of sodium (Na+) ions in the electrolyte, resulting in more aggressive electrochemical discharge; however, it also resulted in severe tool wear. Mixed electrolytes with a KOH yielded lower width and low tool wear. Increasing the volumetric proportion of KOH in the mixed electrolyte gradually decreased the machining depth, width, and tool wear. [ABSTRACT FROM AUTHOR]

This article concerned the mixing of high-viscosity fluids using close-clearance impellers in a cylindrical tank (caustic soda and water). This investigation employed a numerical model to evaluate the performance of three distinct impeller designs at rotational speeds of 10, 20, and 30 rpm. The analysis concentrated on parameters indicative of mixing efficiency, including color dispersion, vector movement of the mixed material, temperature gradients from the tank wall to the center, and the average temperature within the agitator tank. Results indicated that the ribbon impeller operating at 30 rpm achieved the highest average temperature (53.69℃) across all measurement points within the mixing vessel compared to the other impeller configurations. This finding suggests that the ribbon impeller design is most effective in promoting optimal mixing. Additionally, the heat distribution within the tank exhibited a high degree of uniformity, which contributed to consistent vector movement of the mixed material. Furthermore, the temperature gradient, representing the average temperature variation from the tank wall to the center at each depth, was most pronounced with the ribbon impeller design. [ABSTRACT FROM AUTHOR]

Radiolarians have been used to determine geological ages and have contributed markedly to our understanding of Earth's history. Hydrofluoric acid (HF) has traditionally been used to extract radiolarian fossils from siliceous deposits (i.e., radiolarian cherts), but this acid is strictly regulated because of environmental and human health concerns. Here we report on the successful extraction of radiolarians from cherts using a low-concentration NaOH solution (1 mol/L NaOH) as an alternative to HF. The degree of chert dissolution in NaOH is strongly temperature-dependent and is limited at < 80 °C. However, even a 1 mol/L NaOH solution is sufficient to dissolve chert at 100 °C. Our new NaOH method yields better-preserved radiolarian fossils compared with the conventional HF method. The 1 mol/L NaOH solution is less hazardous, easier to handle, and has fewer effects on the environment and human health than HF. Therefore, this method can be widely used for research and teaching purposes in studies of radiolarian fossils, even in institutions where HF cannot be used owing to chemical restrictions. [ABSTRACT FROM AUTHOR]

The European Union's energy policy favors increasing the share of renewable energy in total energy production. In this context, the co-digestion of various waste streams seems an interesting option. This study aimed to determine the effect of selected pretreatment methods on the efficiency and kinetics of the co-digestion process of poultry manure with sewage sludge and organic waste. This research was carried out in four stages: (1) the selection of the third component of the co-digestion mixture; (2) the determination of the most favorable inoculum-to-substrate ratio for the co-digestion mixture; (3) the selection of the most favorable pretreatment parameters based on changes in volatile fatty acids, ammonium nitrogen, extracellular polymers substances (EPS) and non-purgeable organic carbon (NPOC); and (4) the evaluation of anaerobic co-digestion based on the result of the BMP tests and kinetic studies. All the pretreatment methods increased the degree of organic matter liquefaction as measured by the NPOC changes. Waste with a high fat content showed the highest methane potential. The addition of grease trap sludge to feedstock increased methane yield from 320 mL/g VSadd to 340 mL/g VSadd. An optimal inoculum-to-substrate ratio was 2. The pretreatment methods, especially the thermochemical one with NaOH, increased the liquefaction of organic matter and the methane yield, which increased from 340 mL/g VSadd to 501 mL/g VSadd (trial with 4.5 g/L NaoH). [ABSTRACT FROM AUTHOR]

Occupational toxicology in the paper industry aims to study the occupational risks of exposure to chemical, physical and biological compounds used in the workplace, in addition to helping and preventing the possible appearance of adverse effects on the health of workers due to exposure to themselves. The pulp and paper industries use several chemical agents in the production of packaging, demanding attention to handling due to their toxic action, currently research in this area is scarce. In turn, this article sought to demonstrate, through questionnaires and chemical analysis, contamination by hydrochloric acid and sodium hydroxide in workers during their work activity in a paper industry located in southern Brazil. Seeking to increase the studies, the workers' knowledge about the agents was investigated, as well as the use of Personal Protective Equipment (PPE) and the contamination of these individuals with the aforementioned agents. To achieve these objectives, interviews were applied to employees from four different shifts and the clothes were analyzed after the end of the shift through titration and pHmetry analysis. The results of the analyzes showed a lack of awareness among the workers, evidence of contamination and traces of sodium hydroxide on the employees' clothing. These results imply reflection on the indispensability of personal protective equipment. Highlighting the need for the routine use of PPE, as well as offering the necessary qualification for workers, in order to prevent and minimize occupational accidents. [ABSTRACT FROM AUTHOR]

This study investigates the efficacy of a novel low-cost phosphate adsorbent, denoted as SH-CGCS, derived from coal gasification coarse slag (CGCS) via an alkali activation method. SH-CGCS is a mesoporous material with a specific surface area (64 m2/g) approximately six times larger than CGCS (11 m2/g), which enhances its adsorption capacity compared with CGCS. Furthermore, SH-CGCS achieves a phosphate adsorption capacity of 38.5 mg/g in strongly acidic water (pH 3) and demonstrates robust acid resistance, which makes it particularly effective for phosphate removal from acidic wastewater. Results from coexisting anion experiments affirm the good adsorption selectivity of SH-CGCS for phosphate. Moreover, SH-CGCS exhibits proficiency in treating water containing low phosphate concentrations under flowing conditions. The maximum phosphate adsorption capacity of SH-CGCS calculated using the Langmuir model is 23.92 mg/g, surpassing that of other reported adsorbents. Importantly, saturated SH-CGCS can be regenerated and reused, which contributes to its practical applicability. The adsorption mechanisms of SH-CGCS for phosphate involve ligand exchange, inner-sphere complexation, surface precipitation, and electrostatic adsorption. Thus, this study not only enhances the overall utility of CGCS but also presents a simple and efficient method for removing phosphate. Our findings indicate that SH-CGCS holds considerable potential as a phosphate adsorbent, offering a promising solution for wastewater treatment. [ABSTRACT FROM AUTHOR]

A simple and economical approach has been proposed for the transformation of 2-(quinolyl-propanoyl)-N-phenylhydrazine-1-carbothioamide into 4-methyl-3-[2-(4-phenyl-5-sulfanylidene-4,5-dihydro-1H-1,2,4-triazol-3-yl)ethyl]quinolin-2(1H)-ones and 3-[2-(5-anilino-1,3,4-thiadiazol-2-yl)ethyl] 4-methylquino-lin-2(1H)-ones by heterocyclization in the presence of aqueous sodium hydroxide and concentrated sulfuric acid, respectively. The reactions are economically efficient, and the target products are formed in high yields (85–98%) under mild conditions without using expensive catalysts and column chromatography for their isolation. [ABSTRACT FROM AUTHOR]

A series of batch assays have been conducted to investigate the optimal factors that can be adopted to improve the anaerobic digestion (AD) performance of Phragmites australis and increase biogas production. The assays were carried out using 125 mL microcosm reactors with a working volume of 80 mL and incubated at mesophilic conditions (37 ± 1ºC). The effect of particle size (10, 5, 2, and < 1 mm) and alkaline pre-treatment of P. australis using various concentrations of sodium hydroxide (0.5, 1, 2, and 4%) on biogas production was examined. Furthermore, the best pre-treatment incubation time (12, 24, 48, 72, 96, and 120 h) and the optimal inoculum to substrate ratio (ISR: 4:1, 2:1, 1:1, 1:2 and 1:4) were also assessed. The results revealed that the highest biogas production from P. australis was achieved at particle size < 1 mm (27.97 ± 0.07 and 16.67 ± 0.09 mL/g VS added, for pre-treated and untreated P. australis respectively); 2% and 4% NaOH concentration for pre-treatment (70.01 ± 3.75 and 76.14 ± 2.62 mL/g VS added, respectively); pre-treatment incubation time of 72, 96, and 120 h (71.18 ± 1.79, 72.46 ± 1.08, and 73.78 ± 1.87 mL/g VS added, respectively); and ISR of 1:2 for pre-treated P. australis (78.21 ± 0.36 mL/g VS added) and ISR 1:4 for untreated P. australis (28.93 ± 1.55 mL/g VS added). Determining optimal parameters in this work would guide further development of process configurations, such as continuous AD systems. [ABSTRACT FROM AUTHOR]

This study focused on determining the effect of the inoculum to substrate ratio (ISR) on biogas production efficiency from the anaerobic co-digestion of two substrates: synthetic food waste and common reeds (Phragmites australis) that were ground and pre-treated using sodium hydroxide at a concentration of 2% to increase access to their cellulose. It also studied the role of different mixing ratios of the two substrates in improving the stability of the digestion process and increasing biogas production. A series of batch tests were carried out under mesophilic conditions using three ratios of ISR: 1:4, 1:2, and 1:1, and five substrate mixing ratios (synthetic food waste: pre-treated P. australis): 25:75, 50:50, 75:25, 100:0, and 0:100. The results showed low biogas production at the ISR 1:4 (21.58±0.00–44.46±0.01 mL/g volatile solid (VS) added), and the reactors suffered from acidification at the different substrates mixing ratios, while the biogas production increased at an ISR of 1:2, where the reactors with the substrate mixing ratio of 25:75 presented the highest biogas production (82.17±0.62 mL/g VS added), and the digestion process was stable. However, the reactors with substrate mixing ratios of 50:50, 75:25, and 100:0 suffered from acidification effects at this ISR. In contrast, at ISR of 1:1, the reactors did not expose to acidification inhibition at all the substrates mixing ratios, and the highest biogas production was found at synthetic food waste: pre-treated P. australis mixing ratios of 75:25 and 100:0 (76.15±1.85 and 82.47±1.85 mL/g VS added, respectively). [ABSTRACT FROM AUTHOR]

This research study compares two methods of cellulose extraction from Theobroma cacao L. (CMT) clone Federación Arauquita 5 (FEAR 5) husks. Method 1 (Lubis) is an alkaline treatment with heating that uses sodium hydroxide and whitening with sodium hypochlorite. In the second method, a soxhlet extraction is conducted for a period of six hours, followed by an alkaline-acidic treatment. Physicochemical and thermographic analyzes are conducted to identify characteristics specific to the extraction method. The results show that the highest mass cellulose yield is obtained by the modified Lubis method 1 with 27.09%. It is concluded that the cellulose obtained can be produced and used to develop biotechnological products, contributing to the circular economy and the sustainable development of cocoa in the Department of Risaralda, Colombia. [ABSTRACT FROM AUTHOR]

The hydrolytic depolymerization of poly(ethylene terephthalate) (PET) fibers with solid sodium hydroxide was investigated. The study presents an innovative recycling approach for the recovery of virgin‐quality terephthalic acid (TA) from textile blends consisting of PET and elastane fibers. PET fibers were depolymerized for 5 min at 140 °C. An internal mixer served as an investigation platform for the experiments. The quality of TA is quantified based on its color value. Both the hydrolytic depolymerization of polyester fibers and the quality of the recovered TA are not impaired by the presence of up to 15 % elastane fibers in textile blends. [ABSTRACT FROM AUTHOR]

Copyright of Polymer Materials Science & Engineering is the property of Sichuan University, Polymer Research Institute and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study was conducted to optimize the reaction conditions based on the solubility percentage of carboxymethyl NMG by monochloroacetic acid (MCA) in the presence of sodium hydroxide (alkaline environment). The effect of various reaction parameters (pH, MCA concentration, and temperature) on the solubility of NFG was evaluated. The highest solubility (85.49% by weight) was obtained at the NaOH concentration of 0.048 mol and MCA (as an etherifying agent) concentration of 0.016 mol at 75 °C. The novel nanofibers (NFs) were developed using modified frankincense gum (MFG)/Zein-containing peppermint essential oil (PEO) by applying electrospinning at different MFG/Zein ratios. The results of the Fourier transform infrared (FT-IR) analysis demonstrated compatibility between essential oil and MFG/Zein. Furthermore, the prepared scaffold (i.e., Zein/MFG/PEO) showed antibacterial properties against Staphylococcus aureus and Escherichia coli. According to the current research, the obtained NFs can be conveniently used as a substrate for encapsulating PEO as a hydrophobic component. Also, modified gum was identified as an excellent source of natural gum with high functional and physical properties. Therefore, it can be used in the formulation of food products, packaging of activity foods, and pharmaceuticals. [ABSTRACT FROM AUTHOR]

Extraction parameters are important in determining the physicochemical properties of extracts. This work aimed to investigate the effect of extraction parameters on the physicochemical properties of keratin powder obtained from chicken feather wastes. Keratin was extracted using alkaline hydrolysis under different experimental conditions viz: concentration of sodium hydroxide, retention time and temperature. Extracted keratin powder was subjected to physicochemical, bulk powder and microbiological investigations. The powder was also subjected to high-resolution analyses such as scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and differential scanning calorimetry (DSC). An optimal yield of 62% keratin was obtained from 3.0 M NaOH solution at 37°C and 24 hours’ reaction time. Extracted keratin powder was odourless, light-brown and insoluble in neutral and acidic solutions but soluble in alkaline medium. It exhibited a moisture sorption capacity of 98% with fair to good flowability. SEM revealed a rough surface powder particle with a mean diameter of 100 µm. FTIR spectroscopy revealed the presence of amide groups while DSC showed a melting point of 110°C. Extraction conditions impacted yield, physicochemical and powder properties of keratin from chicken feathers. The powder may be useful as an excipient in colon-targeted drug delivery due to its pH-dependent solubility. [ABSTRACT FROM AUTHOR]

In order to cleanly and efficiently extract zirconium from zircon sand (the main component is ZrSiO4), sodium hydroxide sub-molten salt was used to decompose ZrSiO4 in this study. When ZrSiO4 reacts with sodium hydroxide sub-molten salt, the formation of Na2ZrSiO5 (a water-insoluble product) considerably affects the separation efficiency of Zr and Si and increases production cost. Thus, it is necessary to control the formation of Na2ZrSiO5. The influence of NaOH content, reaction temperature, reaction time, and NaOH/ore mass ratio on the formation of Na2ZrSiO5 were systematically investigated. The optimum reaction parameters for the inhibition of Na2ZrSiO5 formation were as follows: 80% NaOH content, 245 °C reaction temperature, 4:1 NaOH/ore mass ratio, 10 h reaction time, and 400 r/min agitation speed. These results indicate that ZrSiO4 is decomposed to Na2ZrO3 and Na2SiO3 by reacting with NaOH, realizing the separation of Zr and Si, and then the reactions between Na2ZrO3 and Na2SiO3 result in the formation of Na2ZrSiO5, during the decomposition of ZrSiO4 using NaOH sub-molten salt. The sub-molten salt decomposition process can realize the clean extraction of zirconium, which is conducive to the sustainable development of zirconium resources. [ABSTRACT FROM AUTHOR]

Copyright of Hydrometallurgy of China is the property of Hydrometallurgy of China Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The mercury cell manufacturing process, which has been extensively used in chlor-alkali plants to produce chlorine and caustic soda by electrolysis, represents a major source of Hg environmental pollution. At Saline di Volterra (Tuscany, Italy), solution mining by pumping water into halite deposits was applied to produce brines for a mercury-cell chlor-alkali plant. The Hg-contaminated, exhausted brines were pumped back at depth into the rock salt field in order to renew the available resources. Activities ceased in 1994, following the leakage dispersion of highly contaminated Hg(0)-bearing brines into the environment. The mercury content in the soil, measured during a survey conducted in 2000, reached 334 mg/kg, highlighting diffuse contamination in the floodplain. By 2009, the Hg concentration had generally decreased and was mostly confined to the topsoil layer. In order to evaluate the present Hg soil pollution, a geochemical survey was carried out in 2023, almost thirty years after the contamination event. The obtained data indicated the occurrence of legacy Hg, which reached 25.5 mg/kg in some soil samples. Speciation analysis for the most contaminated soil revealed that Hg(0) represented about 17.3% of the total Hg and that water-soluble and organic Hg fractions were negligible. These results suggest that the originally released metallic mercury has volatilized and likely oxidized, becoming practically immobile in the soil. A risk assessment, performed by applying Hg speciation analysis, indicated that the mercury in the soil does not carry a risk of non-cancerous effects for different exposure routes in case of subsequent use of the site and that the formerly contaminated area can now be converted into a leisure area. [ABSTRACT FROM AUTHOR]

Dissolved lead is a serious but common health hazard in drinking water, yet there is still no practical way to monitor its levels continuously in the distribution system or at the point of use. Here we propose using a lead-selective membrane on top of a chemiresistive device to continuously measure Pb2+ ion concentrations in real time. The detection limit was lowered by stabilizing the surface of the resistive film with sodium hydroxide and 15-crown-5 ether and optimizing the sensor geometry to maximize the effective surface area. The detection mechanism is based on the complexation of the Pb2+ ions by the lead ionophores within the membrane, thus modulating the interactions between the ionophores and the chemiresistive film. The limit of detection of the fabricated devices was reliably below 2 μg L−1, with concentrations up to 3 mg L−1 routinely quantifiable over several measurement cycles. The chemiresistive sensors can thus achieve lower detection limits than potentiometric devices while being more robust and simpler to fabricate by omitting the reference electrode. Ion-selective membrane-covered chemiresistors can therefore be deployed to continuously monitor drinking water sources and detect harmful levels of lead in real time. [ABSTRACT FROM AUTHOR]

Waste from construction and demolition (also known as CDW) is one of the most harmful environmental issues. This study's primary goal is to produce new mortar and brick materials from recycled concrete powder (RCP) and recycled brick powder (RBP), two of the most popular CDW. Geopolymeric mortar and brick samples were produced by passing RCP and RBP through sieve No. 50 (with sand filler if necessary) and combining them with an alkaline solution made of water glass (WG) and NaOH. In this study, the mixture was then cured for three days at 80 °C in an oven. The effects of filler, RBP amount, WG amount, and the concentration of NaOH alkaline solution on the samples’ strength were examined. Additionally, XRF and SEM/XRD tests were performed to verify the materials' composition and microstructure. The mechanical strength of the samples showed an increase with the increase of RCP values, so the brick sample with filler showed the highest compressive strength, measuring 59.53 MPa. The study's samples exhibited strong mechanical properties. Additionally, all of the bricks' water absorption fell within the standard range. In summary, according to different standards, both waste concrete and waste brick can be used to produce geopolymer materials especially bricks for construction and paving purposes. [ABSTRACT FROM AUTHOR]

Calibration of titration calorimeters is an ongoing problem, particularly with calorimeters with reaction vessel volumes < 10 mL in which an electrical calibration heater is positioned outside the calorimetric vessel. Consequently, a chemical reaction with a known enthalpy change must be used to accurately calibrate these calorimeters. This work proposes the use of standard solutions of potassium acid phthalate (KHP) titrated into solutions of excess sodium hydroxide (NaOH) or excess tris(hydroxymethyl)aminomethane (TRIS) as standard reactions to determine the collective accuracy of the relevant variables in a determination of the molar enthalpy change for a reaction. KHP is readily available in high purity, weighable for easy preparation of solutions with accurately known concentrations, stable in solution, not compromised by side reactions with common contaminants such as atmospheric CO2, and non-corrosive to materials used in calorimeter construction. Molar enthalpy changes for these reactions were calculated from 0 to 60 °C from reliable literature data for the pKa of KHP, the molar enthalpy change for protonation of TRIS, and the molar enthalpy change for ionization of water. The feasibility of using these reactions as enthalpic standards was tested in several calorimeters; a 50 mL CSC 4300, a 185 μL NanoITC, a 1.4 mL VP-ITC, and a TAM III with 1 mL reaction vessels. The results from the 50 mL CSC 4300, which was accurately calibrated with an electric heater, verified the accuracy of the calculated standard values for the molar enthalpy changes of the proposed reactions. [ABSTRACT FROM AUTHOR]

The purpose of the study was to improve the cell wall-breaking rate of industrial Saccharomyces cerevisiae and its application value. The effects of heat, alkali and ultrasonic synergistic treatment on the cell wall-breaking rate of industrial Saccharomyces cerevisiae ScY01 strain were explored. The results showed that the wall-breaking rate of ScY01 strain with a concentration of 6 g/L was 91.78% when treated with heat (boiling water bath 12.5 min), alkali (sodium hydroxide 0.6 g) and ultrasonic crushing (ultrasonic power 450 W, radiation time 11 s, radiation interval 15 s, ultrasonic time 20 min). The amount of protein released after cell fragmentation was used for preliminary application characterization, the total protein release by synergistic treatment was 11.54 times higher than that of alkali alone, 10.26 times higher than that by boiling alone, and 4.01 times higher than that by ultrasonic alone. The study indicates that the synergistic treatment is suitable for model Saccharomyces cerevisiae strain CEN.PK2-1c, and the experimental results can provide a new method for efficient crushing of industrial Saccharomyces cerevisiae cells. [ABSTRACT FROM AUTHOR]

Geopolymer concrete (GPC) represents an innovative green and low-carbon construction material, offering a viable alternative to ordinary Portland cement concrete (OPC) in building applications. However, existing studies tend to overlook the recyclability aspect of GPC for future use. Various structural applications necessitate the use of concrete with distinct strength characteristics. The recyclability of the parent concrete is influenced by these varying strengths. This study examined the recycling potential of GPC across a spectrum of strength grades (40, 60, 80, and 100 MPa, marked as C40, C60, C80, and C100) when subjected to freeze–thaw conditions. Recycling 5–16 mm recycled geopolymer coarse aggregate (RGAs) from GPC prepared from 5 to 16 mm natural coarse aggregates (NAs). The cementitious material comprised 60% metakaolin and 40% slag, with natural gravel serving as the NAs, and the alkali activator consisting of sodium hydroxide solution and sodium silicate solution. The strength of the GPC was modulated by altering the Na/Al ratio. After 350 freeze–thaw cycles, the GPC specimens underwent crushing, washing, and sieving to produce RGAs. Subsequently, their physical properties (apparent density, water absorption, crushing index, and attached mortar content and microstructure (microhardness, SEM, and XRD) were thoroughly examined. The findings indicated that GPC with strength grades of C100, C80, and C60 were capable of enduring 350 freeze–thaw cycles, in contrast to C40, which did not withstand these conditions. RGAs derived from GPC of strength grades C100 and C80 complied with the criteria for Class II recycled aggregates, whereas RGAs produced from GPC of strength grade C60 aligned with the Class III level. A higher-strength grade in the parent concrete correlated with enhanced performance characteristics in the resulting recycled aggregates. [ABSTRACT FROM AUTHOR]

Corundum and transition alumina powders are commonly produced through the Bayer process—that is, by digestion of bauxite in a sodium hydroxide solution, followed by gibbsite precipitation, which contains significant amounts of Na+ ions. During the de‐hydroxylation of gibbsite, Na+ is associated with retardation of the structural phase transformations between transition alumina and corundum (α‐Al2O3) phases, although the exact role of Na is unclear. The influence of Na+ ions on the phase transformation of γ‐Al2O3 to α‐alumina was investigated by varying the concentration of NaOH in aqueous γ‐Al2O3 suspensions. The phase transformation behavior of γ‐Al2O3 was monitored through thermal analysis, X‐ray diffraction, scanning electron microscope, X‐ray photoelectron spectrometer (XPS), and transmission electron microscope. As the Na concentration in γ‐alumina suspensions increased, the amount of α‐Al2O3 decreased in samples that were heat treated at 1200°C for 2 h. XPS analysis indicated that washing transition alumina powders with NH4OH solutions had decreased the surface concentration of Na+ and facilitated the phase transformation to α‐Al2O3. [ABSTRACT FROM AUTHOR]

It is imperative to minimize radioiodine release to the environment through gaseous emissions of spent fuel reprocessing facilities, thereby mitigating its potential impact on the general public. One effective and widely adopted strategy for achieving this objective is caustic scrubbing, a method that involves the absorption of molecular iodine from gaseous streams using caustic soda ( NaOH ) solution in a packed column. In-depth laboratory-scale experiments were conducted to ascertain the overall volumetric mass transfer coefficient K G a for the absorption of dilute iodine vapor from air into a caustic soda solution in a packed column and to establish optimum performance parameters for this process. The investigation yielded noteworthy findings: K G a increased proportionately to (Gas phase Reynolds number)1.0 at constant liquid flow rates across all types of packing tested. K G a displayed relative independence from liquid velocities for high and moderate NaOH concentrations. However, this coefficient varied proportionately to (Liquid phase velocity)0.26 to 0.42 at lower NaOH concentrations under conditions of high gas flow rates NaOH . As the height of the column increased, K G a was found to decrease slightly. The presence of NOx at an inlet concentration of 9000 ppm in the gaseous stream led to a reduction in the mass transfer coefficient of iodine, particularly at low NaOH concentrations. In summary, the study underscores the importance of caustic scrubbing as an effective means to minimize the release of radioiodine. The investigation's results provide valuable insights into optimizing performance parameters for this process, contributing to enhanced environmental protection. [ABSTRACT FROM AUTHOR]

Recently, abaca fibers have become the focus of specialized research due to their intriguing characteristics, with their outstanding mechanical properties being a particularly notable. In the conducted study, the abaca fibers underwent a preliminary treatment process involving an alkaline solution, which was composed of 0.5% sodium hydroxide (NaOH) and 50% acetic acid (CHCOOH). This process entailed immersing each fiber in the solution for a period of one hour. This treatment led to a 52.36% reduction in lignin content compared to the levels before treatment, resulting in a dramatic decrease in the full width at half maximum (FWHM) in the XRD spectra from 1.13 to 0.13. This change indicates that the fibers became more crystalline following the treatment. The abaca fibers were also characterized using BET (Brunauer Emmett Teller) measurements, which revealed that the average pore length ranged from 33–49 nm and the surface area was between 13–28 m·g. The morphology of the abaca fiber after alkali an hydrolisis treatment (AFAH) appeared rougher and more uniform. DMA measurements revealed a significant rise in the storage modulus of the single fiber post-treatment, with dependencies on both frequency and temperature. AFAH exhibited an optimal absorption coefficient of α = 0.9 for frequencies above 2500 Hz. The combined effect of alkalization and hydrolyzation treatments, while resulting in an enhancement in the mechanical properties of the fibers, also reduced high-intensity noise produced by sources such as machinery, aircraft takeoffs and landings, etc. across a broader working frequency range. Graphic Abstract [ABSTRACT FROM AUTHOR]

The aim of this study is to explore new ways of resource utilization of lithium pyroxene tailings and refining slag. The effects of sodium hydroxide addition, water glass addition and the doping ratio of lithium pyroxene tailings and refining slag on the mechanical properties of geopolymers were analyzed through one-way and orthogonal experiments. On this basis, we focused on the influence of the change of sodium hydroxide addition on the preparation of lithium pyroxene tailings-refining slag based geopolymer and its mechanical properties, and analyzed the influence of sodium hydroxide on the microstructure of geopolymer by using the characterization means such as XRD, SEM, FT-IR and so on. The results showed that the 28 d compressive strength of the geopolymer was up to 26.78 MPa when the ratio of lithium pyroxene tailings to refinery slag was 73, the addition of water glass was 15 mL, and the addition of sodium hydroxide was 2 g. The addition of sodium hydroxide had the most significant effect on the preparation of geopolymer among the three influencing factors. When the alkalinity of lithium pyroxene tailings was too high, the dissolution of silica-oxygen tetrahedra and aluminium-oxygen tetrahedra was slowed down or inhibited, thus affecting the synthesis of C-S-H gels and N-A-S-H gels. XRD and SEM analyses showed that, with the increase of the content of sodium hydroxide, the generated gels firstly increased and then decreased, and at the same time, they combined with the substances such as bluestone, which increased the degree of densification of the geopolymer. In addition, the loss of compressive strength of the lithium pyroxene tailings-refinery slag-based geopolymer was small at 800 indicating its good high temperature resistance. [ABSTRACT FROM AUTHOR]

Today, concrete is the most widely used building material. Cement production releases about 7% of carbon dioxide gas into the atmosphere and increases greenhouse gases, so it seems necessary to use an alternative to Portland cement. In recent years, geopolymers have been considered a suitable and environmentally friendly alternative to conventional Portland cement. Geopolymer concrete can be made from different sources of alumina silicate. The main goal of this experimental research is to improve the properties of physical resistance and durability of geopolymer concrete, such as carbonation, chloride ion penetration and water absorption, in order to produce sustainable materials and replace ordinary cement. It has been determined that with the concentration of the alkaline solution of 12 M and the curing temperature of 90 degrees Celsius, the properties of mechanical resistance, impact resistance (energy absorption) and durability of geopolymer concrete are improved. Also, the results show that if alkaline solutions are combined, the sample containing 80% NaOH and 20% KOH has better mechanical properties, durability and higher modulus of elasticity than other cases. Also, in terms of the correlation matrix of the modulus of elasticity (percentage of compliance with the common concrete regulations), the best results are related to the T-N80K20 mixing design with concentrations of 8 and 12 M and at curing temperature of 90 degrees Celsius with the CEB regulations, and at a curing temperature of 25 °C was obtained according to ACI 365 and ACI 318 regulations. [ABSTRACT FROM AUTHOR]

As humanity envisions the possibility of inhabiting Mars in the future, the imperative for survival in the face of its challenging conditions necessitates the construction of protective shelters to mitigate the effects of radiation exposure and the absence of atmospheric pressure. The feasibility of producing geopolymers using the Martian regolith simulant MGS-1 (as precursor) for potential building and infrastructure projects on Mars in the future is investigated in this paper. Various alkaline activators, such as sodium hydroxide (NaOH), lithium hydroxide (LiOH·H2O) and sodium silicate (Na2SiO3), are employed to investigate their efficiency in activating the precursor. The influence of alkali type and concentration on the mechanical performance of the synthesized geopolymers is examined. Geopolymer samples are oven-cured for 7 days at 70 °C before a compressive strength test. It is found that through the hybrid use of LiOH·H2O and NaOH with optimal concentrations, metakaolin and milled MGS-1 as precursors, geopolymer mixtures with a compressive strength of 30 ± 2 MPa can be developed. The present test results preliminarily demonstrate the potential of Martian regolith simulant-based geopolymers as suitable construction and building materials for use on Mars. [ABSTRACT FROM AUTHOR]

Chromatography resins used for purifying biopharmaceuticals are generally dedicated to a single product. For clinical manufacturing, this can result in resin being used only for a fraction of its potential lifetime. Extending the use of resins to multiple products can significantly reduce resin waste and cost. It can also improve manufacturing flexibility in case of raw material shortage during times such as the COVID‐19 pandemic. The work presented herein describes an overarching multiproduct resin reuse (MRR) strategy, which includes a risk assessment, strategic planning, small‐scale feasibility runs, and the successful execution of the MRR strategy to support Good manufacturing practice (GMP) clinical manufacturing of an antibody‐based therapeutic. Specifically, an anion exchange (AEX) and cation exchange (CEX) MRR strategy is described. Clearance of carryover biological product is demonstrated by first cleaning the AEX and CEX manufacturing columns with sodium hydroxide to ensure inactivation and degradation of the carryover protein and followed by a blank buffer elution that is tested using various analytical methodologies to ensure reduction of the carryover protein to an acceptable level. To our knowledge, this is the first time an MRR approach has been successfully implemented and submitted to health authorities to support biologic GMP clinical manufacture. [ABSTRACT FROM AUTHOR]

Diglycidil ether of isosorbide (DGEISO), a potential biobased substitute for petro-based epoxy resin, such as to diglycidil ether of bisphenol A (DGEBA), was synthesized with a classic epoxidation route using isosorbide, epichlorohydrin, and sodium hydroxide. Fourier-transform infrared spectroscopy (FTIR) an inexpensive and fast technique, was used to monitor the DGEISO synthesis by the conversion of epoxy groups, reaching a constant absorption index after 2.5 h of the reaction. Differential scanning calorimetry (DSC) scans displayed that DGEISO epoxy curing temperature with methyltetrahydrophtalic anhydride (MTHPA) is similar to diglycidil ether of bisphenol A (DGEBA) (~ 135 °C) in the whole range of the heating rates evaluated in this work (2.5–20 °C/min). The curing kinetics of both DGEISO/MTHPA and DGEBA/MTHPA were evaluated using the Friedman, Vyazovkin, and Ozawa model, whereas the first two models described the kinetics parameters with errors lower than 3%. Despite subtle differences in the investigated systems' different thermal properties, the similar curing behavior could be beneficial, suggesting the DGEISO resin could be a competitive replacement for epoxy resins. [ABSTRACT FROM AUTHOR]