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Copyright of Nonferrous Metals (Extractive Metallurgy) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Nonferrous Metals (Extractive Metallurgy) is the property of Beijing Research Institute of Mining & Metallurgy Technology Group 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 Science & Technology of Food Industry is the property of Science & Technology of Food Industry 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.)

A 2.8 MM TPY heavy oil catalytic cracking unit in a refinery has been undergoing slurry recycling for about six months under low processing capacity. The recycling method involves injecting the recycled slurry into the mixed feedstock oil at the feedstock self-protection assembly and then into the feedstock oil nozzle. After calibration, the yield of coke increases from 7.86% to 8.41%, accounting for about 20% of the recycled slurry to produce coke. The diesel yield of the unit has increased, and about 50% of the recycled slurry has been converted or becomes high-value diesel products. The slurry recycling resulted in a decrease in the overall conversion rate of the unit, with a total reduction of 1.93 percentage points in the yields of dry gas, liquefied petroleum gas, and gasoline. During the recycling process of slurry, the unit monitors the feedstock oil and reaction system, and has not found any significant impact on coking in the reaction system, wear of the feedstock oil pipeline and nozzle, or other defects. Subsequent defect elimination inspections have also not found any abnormalities. Overall, the recycling of slurry increases the coke yield of the unit, ensures steam balance in the entire plant under low processing capacity, and effectively reduces the solid content of slurry, resulting in a decrease in the yield of slurry in the unit. [ABSTRACT FROM AUTHOR]

Tea is one of the most important parts of agricultural production in China. A large amount of waste tea residues can be produced every year with the continuous growth of the tea industry. Waste tea residue shares significant economic and medicinal value, due to its bioactive substances, especially caffeine. However, most waste tea residues cannot be fully utilized in a resourceful way, resulting in the waste of resources and pressure on the environment. In this study, an efficient caffeine extraction was proposed using hydrothermal extraction. A systematic investigation was implemented to explore the effects of different factors on extraction efficiency. Response surface ology (RSM) and artificial neural network (ANN) were also combined to optimize and predict the extraction conditions. Firstly, the efficient extraction of caffeine from tea residue was achieved by hydrothermal extraction. The special properties of water were exploited under high temperature and pressure. As such, the lignocellulose structure in tea residues was effectively destroyed to obtain the dissolution of active substances, such as caffeine. The high efficiency and environmental advantages of hydrothermal approaches were emphasized to treat the wet biomass under mild conditions, compared with the conventional one. The better performance was achieved in the high efficiency, low energy consumption, and reduced use of hazardous chemical solvents. Secondly, the key parameters of extraction (hydrothermal temperature, time, liquid-solid ratio, and pH) were systematically analyzed using RSM. The influencing level of each factor on the caffeine extraction was determined to derive the optimal extraction conditions. The experimental results showed that the hydrothermal temperature shared the most significant effect on the caffeine extraction. The extraction efficiency was significantly improved to appropriately increase the hydrothermal temperature. An ANN model was also established to further validate and optimize the extraction conditions. A large amount of experimental data was trained and then validated to learn and simulate complex nonlinear processes. The ANN model was also used to accurately predict caffeine extraction under different conditions. The prediction of the ANN model showed that the optimal extraction conditions were determined as the hydrothermal temperature of 220 °C, hydrothermal time of 3.5 h, liquid-solid ratio of 50 mL/g, and pH 9.0. A caffeine extraction of 66.19 mg/g was expected to be obtained. There was high agreement with the actual experiment (65.81 ± 0.47 mg/g), indicating a high prediction accuracy. The ANN model was verified to optimize and predict the caffeine extraction from waste tea residue, in terms of the high feasibility and accuracy. In conclusion, the organic solvents were avoided to be environmentally friendly and realize green chemistry, indicating the promising potential for the extraction of natural products. Meanwhile, the efficient extraction of caffeine from waste tea residue can provide a useful reference for the high-value recycling of waste biomass resources using RSM and ANN models. The environmental pressure can be alleviated to reduce the waste of resources for the considerable economic benefits in the tea industries. [ABSTRACT FROM AUTHOR]

Agricultural wastes have the potential to enhance the utilization rate and production efficiency in saline-alkali land. In this study, humic acid was incorporated into a substrate module composed of agricultural wastes, including wine lees and straw. A series of experiments was conducted to investigate the effects of various substrates on soil salinity in saline-alkali environments. The "Jinpeng 8 Type B" tomato served as the test sample. Three types of saline-alkali soils were selected: mild S1 (Ec = 1.15 mS/cm, pH = 8.63), moderate S2 (Ec = 3.67 mS/cm, pH = 9.13), and heavy S3 (Ec = 6.39 mS/cm, pH = 9.69). Six groups of humic acid additions were established: T0 (0), T1 (2‰), T2 (4‰), T3 (6‰), T4 (8‰), and T5 (10‰), with the treatment lacking humic acid serving as the control group. The analytic hierarchy process (AHP) and entropy weight methods were employed to assign subjective and objective weights to each indicator. The final weights for each indicator related to tomato cultivation were derived from this assignment. A TOPSIS multi-objective comprehensive evaluation model was constructed, incorporating 16 indicators across three categories: tomato growth physiological indicators, yield, and fruit quality. This model facilitated the determination of optimal substrate allocation for the different types of saline-alkali soils. The results indicated a trend of increasing and then decreasing soil salinity across different types of saline-alkaline soils during the tomato growth stages, from seedling to flowering, fruit enlargement, and maturity. The salt content exhibited a similar trend of increasing and then decreasing with increasing soil layer depth. At the same depth, soil salinity decreased with the addition of humic acid to the substrate. The average salt contents of each soil layer for mild, moderate, and heavy saline-alkali soils treated with 10‰ humic acid were reduced by 60.57%, 13.14%, and 8.31%, respectively, compared to the control group. Notably, the addition of humic acid was most effective in improving mild saline-alkali soil conditions. The humic acid treatment significantly enhanced plant height, stem diameter, soil and plant analyzer development (SPAD), root characteristics, yield, and quality of tomatoes (P<0.05). The parameters for tomato plant height, stem diameter, SPAD value, and root characteristics exhibited a trend of increasing and then decreasing with higher amounts of humic acid added. An optimal combination was identified for evaluating tomato plant height, stem diameter, SPAD value, root characteristics, yield, and quality. In comparison to the absence of humic acid, the addition of 4‰, 6‰, and 8‰ humic acid in mild, moderate, and heavy saline-alkali soils, respectively, resulted in corresponding increases in root quality of 51.17%, 49.60%, and 56.98%, indicating a well-developed root system. The comprehensive indexes for tomatoes were 0.903 0, 0.893 4 and 0.830 4 in mild, moderate, and heavy salinealkali soils with 4 ‰, 6 ‰, and 8 ‰ humic acid, respectively. These findings provide a theoretical basis for the efficient utilization of agricultural waste and the scientific management of high-quality fruit and vegetable production in saline-alkali land. [ABSTRACT FROM AUTHOR]

A large amount of agricultural waste has been produced in the process of production and living. The livestock and poultry manure and crop straw have an annual output of about 3.05, and 870 million tons, respectively. Agricultural waste has enormous biological potential, referred to as a "misplaced resource". It is in high demand for an important measure to promote the utilization of agricultural waste resources for the prevention and control of non-point source pollution under the living environment in rural revitalization. A series of regulations and standards have been introduced to fully utilize straw, livestock, and poultry manure in recent years. Planting and raising are combined into a cycle from "treatment" to "reuse". However, China's agricultural waste reuse has just started, compared with the developed countries. Crop straws and domestic manure are either returned to the field or used as low-value-added feed and fertilizer in China, whereas the high-value-added use has not taken shape yet. Existing policies and regulations cannot fully meet the demand at present, due to mismatched planting and animal raising, under-developed technology, and equipment for manure reuse. It is urgent to require innovative technology, in order to reduce the severe nutrient loss of organic fertilizer and insufficient use of remaining nutrients in the field. It is still lacking research on the treatment of agricultural waste resources. The unreasonable disposal of agricultural waste has caused serious environmental pollution and a large amount of resource waste. The treatment of agricultural waste has been confined to better accelerate modern agriculture in rural areas. As important agricultural countries in the world, Australia and New Zealand have established relatively mature recycling systems for agricultural waste. This study aims to sort out the related technology systems in Australia, New Zealand, and Singapore using field research. A summary was formed from their typical experiences and practices in innovation, platform building, talent training, and application. A strong reference was then provided for the highly efficient reuse of waste in China. As such, the pollutant emission was reduced to improve the mechanization concerning waste reuse. Australia formed a technology system of "Resource +"; New Zealand was a synergistic treatment system of "Waste Source Reduction + Process Control"; and Singapore shared a new anaerobic fermentation for turning municipal domestic waste into resources. The key technologies were reviewed for the waste reused as a resource, equipment for manure returning to the field, and local treatment of manure for small and medium-sized animal-raising farms. The innovation platform was improved to establish a host of world-class laboratories for green agriculture. The manure returning to the field was enhanced to combine the planting and animal raising, in order to promote the integrated application in green agriculture. [ABSTRACT FROM AUTHOR]

Copyright of China Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical Company 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 Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy 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 Journal of Central China Normal University is the property of Huazhong Normal University 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 Acta Agriculturae Zhejiangensis is the property of Acta Agriculturae Zhejiangensis 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.)

Copyright of Journal of Architecture & Civil Engineering is the property of Chang'an Daxue Zazhishe 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 Railway Standard Design is the property of Railway Standard Design 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.)

Copyright of Railway Standard Design is the property of Railway Standard Design 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.)

Purpose;With the increase of mining years,the Anqing copper mine has gradually faced the problem of insufficient storage capacity of tailings dam. Therefore, the study of comprehensive utilization technology of tailings at the Anqing copper mine has been conducted, aiming to achieve the resource utilization of tailings, reduce the amount of tailings disposal,and extend the service life of the tailings dam. Method;Through the research on tailings production processes of Anqing copper mine,and the analysis of physical and chemical characteristics of the tailings, a comprehensive utilization process technology of tailings based on cyclone classification combined with vibratory dewatering has been developed. And by conducting industrial trial, the quality indicators and utilization efficiency of classified coarse tailings were analyzed. Result;The tests results show that the average content of particles finer than -- 74 jLtm of coarse tailings product is less than 15%,and the water content of coarse tailings product is approximately 18%, moreover the content of sulfur is less than 0. 5%, which all meet the requests of standards for construction sand. The industrial trial demonstrated that the comprehensive utilization capacity of the tailings is 30 t/h, with an efficiency of 48%, and can then reduce the tailings discharge by around 200,000 t annually, which can effectively alleviate the Anqing copper mine's problem of insufficient capacity of tailings dam. Significance;The related research results can provide guidance and practical value for mines facing similar challenges and contribute to the development of solid waste comprehensive utilization technology for metal mine tailings in China. [ABSTRACT FROM AUTHOR]

Purpose: This paper aims to explore a new method for efficient mining of iron ore resources, focusing on the effect of the double sublevels parallel mining method in improving mining efficiency and resource recovery rate,and analyze the safety and stability in the mining process through specific cases. Method: Taking an iron ore mine in Anhui province as the research object, the paper innovatively put forward the double sublevels parallel mining method. By using FLAC3D numerical simulation software, a typical stope numerical model with a size of 50 mX 15 mX 120 m (length, width and height)is constructed to simulate the mining process of double sublevels parallel mining. Result; The stress concentration at the bottom of the goaf and host rock on both sides of the stope increased significantly after the excavation of the double-sublevel stope. The goaf roof has significant displacement, with the maximum displacement reaching 1.2 m. The maximum displacement of the side is 0. 8 m. Further analysis shows that the potential failure mode of host rock is mainly shear plastic failure. Conclusion; The double sublevel parallels mining method has significant advantages in improving the efficiency and resource recovery of iron ore mining. [ABSTRACT FROM AUTHOR]

Purpose: To solve the serious problems of high production, large stockpiles, and low utilization in industrial solid wastes. Method: Hot-braised steel slag(SS),a by-product of steel making,and phosphogypsum(PG), a by-product of the phosphorus chemical industry, were taken to prepare inorganic water stability layers for highway engineering as the main raw materials, together with a certain proportion of natural aggregates (NA) and silicate cement (PC), based on the design idea of multi-solid waste synergistic utilisation. Properties such as unconfined compressive strength,splitting strength,bulk stability,and scouring resistance were determined,then the mechanism of the hydration process was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and scanning electron electron microscopy (SKM) . Result; Proper amount of phosphogypsum helps the generation of ettringite to fill the voids, whereas excess dosage makes gypsum adhereto the surface of the steel slag and reduces the bonding force between the aggregates. Especially,Consisting of 6%PG(^0. 30 mm) + 6%PC(^0. 30 mm) + 32%SS (0. 30 -- 4. 65 mm) + 40%NA(4. 65 -- 20. 00 mm) + 22%SS(4. 65 -- 20. 00 mm),layer MW-2 satisfied the high-heavy highway strength criteria, with a solid waste zutilization to 60%. [ABSTRACT FROM AUTHOR]

Purpose;In this paper,the process and properties of imitation stone brick prepared by graphite tailings were studied. Method;The prepared non-fired imitation stone bricks were characterized and evaluated by means of scanning electron microscopy and mechanical property testing. Result; The results show that the optimum mixing ratio of graphite tailings is 50% and the aging time is 21 days. At this time,the compressive strength of the unfired brick is 35. 53 MPa, and the water absorption rate is 4. 22%, which meets the standard of product requirements. Conclusion;Through SEM observation,the surface of the prepared imitation stone brick is flat without obvious pores and cracks. The mechanical properties test shows that the imitation stone brick has good compressive strength and wear resistance. Significance; It is technically feasible to use graphite tailings to prepare unburned bricks, which is of great significance to environmental protection and resource recovery. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Agro-Environment Science is the property of Journal of Agro-Environment Science Editorial Board 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 Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department 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 Acta Materiae Compositae Sinica is the property of Acta Materiea Compositae Sinica Editorial Department 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.)

Waste treatment and utilization are closely related to the ecological environment of the sustainable earth. China has issued a series of relevant laws, regulations, and standards around waste treatment and recycling at present. The waste treatment and utilization have been continuously improved to construct the waste recycling system. However, the imperfect legal and regulatory of waste recycling, and the low efficiency of industrialization have restricted the efficient treatment and utilization of waste in China. It is very necessary to draw on the experiences from of the developed countries in the concepts, policies, technologies, and management on of waste treatment and utilization. Among them, Japan is at the forefront of waste treatment and utilization in the world. This article aims to review the current situation of waste generation, treatment, and utilization in Japan, with the an emphasis on the anaerobic fermentation for biogas production, aerobic composting for fertilizer production, and food waste feed conversion. The results show that a significant downward trend was found in the amount of waste that generated and ultimately treated in Japan since 2000, especially with the promotion of waste classification and recycling. The final disposal volume of waste decreased by about 77% (13 million tons) in 2019, compared with 2000. The waste recycling rate was about 43%, with an increase of 7 percentage points. Anaerobic digestion, aerobic composting, and functional feed technologies were industrialized and applied at the international leading level in Japan. In addition, an in-depth analysis was provided for the rich experience and practical practices in the waste treatment and utilization. Great importance was also attached to the binding role of laws and regulations. A comprehensive regulatory system was established to cover the entire waste recycling chain. The sSpecific and clear provisions were provided for the effective waste management. The sustainable industry was greatly contributed to the stable and efficient operation in of a sound recycling and payment, particularly for an operational subsidy and product policies. In terms of technological innovation, a strong sense of leadership was achieved in the traditional technologies, such as biogas production and incineration power generation. The iIndustrial operations were also observed in new technologies, such as kitchen waste feed conversion and biological hydrogen production, indicating strong technological innovation. The guiding role was also obtained in the science popularization and education. The systematic and multi-level science popularization activities were effectively enhanced the environmental awareness, the concept of 'whoever produces, pays', public participation, and joint maintenance of environmental protection. Finally, some suggestions were made to fully learn from the successful experience and practices in the waste treatment and utilization. The priority principle of 3R (Reduce, Reuse, and Recycle) was followed to construct a complete waste recycling, from the aspects of laws and regulations, technological innovation, operational construction, and conceptual transformation. The low-carbon and circular development can also be promoted to reduce the high waste generation in the diverse types for the high treatment and utilization rates in China. [ABSTRACT FROM AUTHOR]

To achieve efficient degradation of crustacean raw materials and eco-preparation of N-acetyl-oligosaccharides, YS-54 strain screened from offshore soil in Qingdao was used for chitinase preparation in the present study. Chitinase was prepared through 60% ammonium sulfate precipitation and Sephadex G-100 gel filtration chromatography. Enzymatic properties such as optimal temperature, optimal pH, and substrate specificity were characterized. Mass spectrometry was used to determine the polymerization degree of enzymatic products. The 16S rRNA identification result showed that YS-54 strain belonged to the Aeromonas species. Chitinase from Aeromonas sp. YS-54 showed a specific activity of 23.44 U/mg. The molecular weights of chitinase were 63 and 75 kDa as shown by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). Chitinase was stable under the condition of 40 °C and pH5.0. The enzymatic activity was significantly activated by Ba2+, Co2+, Mg2+ and TritonX-100 (P<0.05), while inhibited by Fe3+, Cu2+ and SDS. The specific activity of chitinase toward α-chitin was 7.99 U/mg, 34.09% of that toward colloidal chitin. The polymerization degree of enzymatic hydrolysis products from colloidal chitin and α-chitin were 1~4 and 1~3, respectively. Chitinase from Aeromonas sp. YS-54 was stable in broad range of temperature and pH, meanwhile showed high catalytic efficiency toward α-chitin. The hydrolysis characteristics of chitinase from Aeromonas sp. YS-54 would provide technical support for the comprehensive utilization of crustacean waste. [ABSTRACT FROM AUTHOR]

The use of non ferrous smelting slag to prepare new types of cementitious materials is an important way to realize the resource utilization of solid waste. The gelation mechanism and mechanical properties are the focus of research on non ferrous smelting slag based cementitious materials, and the leaning and solidification mechanisms of heavy metal ions have been receiving increasing attention nowadays. In this article, the morphology and structure of non ferrous smelting slag are described, the existence form and immobilization principle of heavy metal ions in non ferrous smelting slag based cementitious materials are summarized systematically. This review can provide reference for the study of heavy metal immobilization in the application of smelting slag based cementitious materials. [ABSTRACT FROM AUTHOR]

Biomass-derived carbon materials represents promising electrode materials for supercapacitors owing to wide range of precursor sources, large specific surface area, intrinsic heteroatom doping, and controllable pore structure. Additionally, increasing attention has been garnered for significant role in alleviating environmental problems, enhancing waste utilization, and promoting sustainable energy storage applications. This paper summarizes recent advances of biomass-derived carbon materials for supercapacitors with focus on main sources of biomass precursors, preparation strategies and nanostructure for biomass-derived carbon. Then, the pore structure, specific surface area and electrochemical performance of biomass carbon constructed by different strategies (carbonization method, activation method and heteroatom doping) are elaborated. The effect of nanoscale pore structure on their performance is emphasized. Finally, the development prospects and main challenges of biochar in supercapacitors are proposed. This review would provide valuable insights for future development and efficient utilization of biomass carbon. [ABSTRACT FROM AUTHOR]

To realize high value recovery of waste cotton fabric, cellulose nanocrystals (CNCs) were prepared from waste cotton fabric by sulfuric acid hydrolysis, and the prepared CNCs were analyzed from morphology, size and physicochemical property by various characterization methods. The enhancement effect of CNCs on mechanical property of PVA films were explored. The results showed that the prepared CNCs presented a short rod-like structure, with length 168 nm±71 nm and diameter 19 nm±11 nm, and the yield was 54. 2%. The Zeta potential value of CNCs was -31. 8 mV and its dispersion stability was better, the thermal stability of CNCs showed a decrease compared to cotton fabric. The CNCs remained cellulose type I structure with crystallinity of 80.8%. When the mass fraction of CNCs was 5%, compared with PVA film, the tensile strength and breaking elongation rate of PVA composite film were increased 37.8% and 32.7% respectively. It is considered that properties of the prepared CNCs from waste cotton fabric by sulfuric acid hydrolysis are excellent, the mechanical properties of PVA composite film are significantly reinforced, which widen the way of recycling utilization of waste cotton fabric. [ABSTRACT FROM AUTHOR]

Copyright of Coal Science & Technology (0253-2336) is the property of Coal Science & Technology 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 Power Generation Technology is the property of Power Generation Technology 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.)

Copyright of China Synthetic Fiber Industry is the property of Sinopec Baling Petrochemical Company 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 Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy 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 Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy 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.)

Calcium carbide slag is an alkaline hazardous waste generated in industrial production processes. Utilizing the slag for CO2 solidification will help achieve the "carbon peak and carbon neutrality" goal as soon as possible. In alkaline environments, ammonium chloride leaching agents can selectively leach Ca, separating Ca from other impurities in carbide slag to prepare the high-purity calcium-containing solution. Then, the obtained calcium-rich solution is reacted with CO2 to prepare high-purity calcium carbonate, achieving solid waste resource utilization. Using ammonium chloride as the leaching agent and a ball mill as the leaching reaction equipment, a closed mechanical activation method was employed to investigate the effects of process parameters such as leaching agent dosage, mechanical stirring speed, reaction time, and liquid-solid ratio on the Ca leaching rate in carbide slag. The results show that under the optimal reaction conditions of 1.1 times the theoretical amount of ammonium chloride, a ball mill speed of 500 r/min, a reaction time of 10 min, and a liquid-solid ratio of 4:1, the Ca leaching rate could reach 89.76%, and the Ca concentration in the filtrate could reach as high as 79.4 g/L, which could be used for subsequent experiments. Compared to conventional leaching method, the closed mechanical activation method can increase the Ca leaching rate by 3 percentage points and significantly reduces ammonia volatilization, ensuring a good operating environment. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Drainage & Irrigation Machinery Engineering / Paiguan Jixie Gongcheng Xuebao is the property of Editorial Department of Drainage & Irrigation Machinery Engineering 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.)

Agricultural waste resource utilization is to transform a large amount of agricultural waste into available resources and renewable resources. In recent years, with the continuous improvement of northeast agricultural and aquaculture production, pollution of agricultural environment caused by a large amount of agricultural waste and livestock manure is becoming increasingly prominent, so agricultural waste resource utilization is an important link of environmental protection and agricultural development, fully exploring the utilization value of agricultural waste resources is of great significance to the cold region agricultural sustainable development. This paper expounds the present situation and existing problems of agricultural waste resource utilization in cold region, including the main source of agricultural waste, characteristics, hazards and resource utilization way, for the influencing factors of resource utilization and existing problems, put forward reasonable suggestions and prospects, aims to provide theoretical reference basis for protecting the agricultural ecological environment, strengthening agricultural waste resource utilization and planning, to provide a more comprehensive basic information for agricultural waste resource utilization. [ABSTRACT FROM AUTHOR]

To realize the resource utilization of solid waste of iron tailings, steel slag and phosphorus slag, reduce the amount of cement and reduce the adverse impact of iron tailings powder as admixture on concrete, three admixtures of phosphorus slag powder, desulfurization ash powder and steel slag powder were introduced based on high-silicon iron tailings powder. The compressive properties of iron tailing powder-phosphorus slag powder-desulfurization ash powder (IPD), iron tailing powder-phosphorus slag powder-steel slag powder (IPS) and iron tailing powder-steel slag powder-desulfurization ash powder (ISD) concretes were investigated. Mercury injection test and backscattered electron were used to test and analyze the internal pores and interfacial transition zone of concrete. The results show that the 28-day compressive strengthes of IPD system, IPS system and ISD system respectively reach 80.1%, 92.4% and 82.5% of that of pure cement concrete, and the interfacial transition zone between aggregate and cement is more dense after the addition of the admixture with reduced porosity to different degrees. The filling effect of the admixture is well exerted, and the adverse influence of internal porosity on concrete is alleviated. [ABSTRACT FROM AUTHOR]

The waste gas mud generated during the drilling process of the Yanchang gas field is treated with solid-liquid separation, oil/water recycling, and solidification of bottom mud. Research shows that after solid-liquid separation of waste mud, the reduction rate reaches 82.11%, and the oil recovery rate and water content in the recovered oil are 94.50% and 0.43%, respectively; after chemical oxidation floeeulation filtration treatment, the separated effluent has a light transmittanee of over 98. 5% and can be used for the repreparation of oilfield working fluids; the oil content in the sediment is 4.56%, and after solidification treatment, the compressive strength can reach 15.977 MPa. It can be used for laying well pads or roads in oil and gas fields, and the leachate from the solidified form meets the water quality requirements of the "Comprehensive Wastewater Discharge Standard". [ABSTRACT FROM AUTHOR]

Copyright of Psychological Science is the property of Psychological Science 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.)

Copyright of China Mining Magazine is the property of China Mining Magazine Co., Ltd. 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 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.)

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University 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.)

Copyright of Agricultural Outlook (1673-3908) is the property of Institute of Agricultural Information, Chinese Academy of Agricultural Sciences 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 generation and storage of copper smelting slag poses serious ecological and environmental safety risks. How to make full use of copper smelting slag, achieve comprehensive utilization of secondary resources, and reduce environmental safety risks has become a current research hotspot. Purpose: By integrating and summarizing the existing research results and knowledge in the field of comprehensive utilization of copper smelting slag, this study explores the application prospects of copper smelting slag in road base materials and puts forward relevant suggestions. Method: Conduct a systematic review and analysis of relevant literature. Conclusion: The use of copper smelting slag to prepare road base materials can not only utilize copper smelting slag on a large scale, reduce potential environmental pollution problems caused by the discharge and storage of copper smelting slag, but also effectively solve the problem of limited sources of raw materials for traditional road base materials, which is very important for regional infrastructure construction and sustainable development of the ecological environment are of great significance. [ABSTRACT FROM AUTHOR]

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.)

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.)

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.)

In order to expand the utilization of waste tobacco, hydrothermal reaction technology was used to prepare tobacco hydrothermal reaction flavors based on waste tobacco. The effects of different reaction conditions on the generation of aroma components in the flavor were analysed using gas chromatography-mass spectrometry. Evaluation of hydrothermal reaction flavor for cigarette flavouring applications by sensory quality assessments. The results showed that with the increase of reaction temperature, reaction time and the decrease of solid-liquid ratio, the totalcontent of aroma components in the hydrothermal reaction spices showed a trend of increasing and then decreasing. At the reaction temperature of 220 ²C, reaction time of 70 min and a solid-liquid ratio of 2:11, the total aroma composition was the highest at 2 325. 35 μg/g, of which the content of heterocyclic and ketones was higher and the content of aldehydes and phenolic compounds was lower. The hydrothermal reaction flavor have the characteristics of floral, baking and caramel aromas. When the hydrothermal reaction flavor was added at a level of 4 mg/cigarette, the aroma quality and aroma volume of the cigarettes were increased, the irritation was reduced, and the overall organoleptic quality was improved. [ABSTRACT FROM AUTHOR]

Decarbonization gasification slag is a porous solid waste obtained by flotation extraction of residual carbon from coal gasification slag. At present, it is generally used to produce decarbonization gasification slag-based soil conditioner for soil improvement to achieve waste reuse. In order to study effects of decarbonized gasification slag-based soil conditioner on soil properties and growth of forage grass, in this study, using field plot test, and soil nutrients, taking Leymus chinensis as the indicate crop, five appication levels of decarbonized gasification slag-based soil conditioner such as 0(CK), 15(SF1), 30(SF2), 60(SF3), and 120 t/ha(SF4) were set, and physical and chemical properties of sandy soil, physiological and biochemical indexes and quality of Leymus chinensis were analyzed. The results showed that decarbonized gasification slag-based soil conditioner could effectively improve soil nutrient supply capacity, the contents of soil organic matter, alkaline hydrolyzed nitrogen, and available phosphorus in soil of the treatments with addition of decarbonized gasification slag-based soil conditioner increased by 8.95%- 76.96%, 4.95%-46.59%, and 5.80%-105.80% compared to those in CK, respectively. The contents of soil organic matter, alkaline hydrolyzed nitrogen, and available phosphorus in the treatment SF4 were significantly higher than those in other treatments. Compared to CK, the aboveground biomass and the plant height at maturity stage of Leymus chinensis in the treatments with addition of decarbonized gasification slag-based soil conditioner increased by 31.52%-113.16% and 7.10%-28.90%, respectively. The contents of crude protein and crude fat of Leymus chinensis in the additon treatments increased by 29.26% -64.36% and 8.74%-24.84%, respectively. The increase rate of the indexes in the treatment SF4 was the highest, and the contents of crude protein and crude fat reached to 73.70 and 117.10 g/kg. In conclusion, the treatment SF4 could not only significantly regulate the effectiveness of soil nutrients, but also promote the effective accumulation of biomass of Leymus chinensis in sand land, therefore, it was the best application levle of decarbonized gasification slag-based soil conditioner. [ABSTRACT FROM AUTHOR]

In order to achieve energy saving and environmental protection, the research and utilization of solid waste polyurethane is realized. Using monocomponent di-propylene glycol (PG) and polyethylene glycol (PEG) as the alcoholysis agent of the two-component diols, alkali metal sodium hydroxide as the metal catalyst, and montmorillonite clay (MMT) as the modifier, the degradation products were utilized to re-prepare montmorillonite/polyurethane nanocomposites with excellent performance, and to re-prepare nano-foam materials. And a series of tests and analyses were carried out on the degradation products and nanofoam materials. The results show that when m(PG): m(PEG) = 40: 60, sodium hydroxide is 1.0 g, montmorillonite addition is 0.3 g, the polyurethane nanomaterials can achieve the best degradation effect, the apparent density of the newly prepared nano-foam material is 0.05 g/cm3, the compressive strength is 0.41 MPa. At this time, the nano-foam material has a smaller thermal conductivity and better cold-retaining performance, and meets the requirements of the national standard. [ABSTRACT FROM AUTHOR]