17 results on '"Dai, Yanjun"'
Search Results
2. Acidogenic fermentation of organic wastes for production of volatile fatty acids
- Author
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Zhang, Le, primary, Tsui, To-Hung, additional, Loh, Kai-Chee, additional, Dai, Yanjun, additional, and Tong, Yen Wah, additional
- Published
- 2022
- Full Text
- View/download PDF
3. Strategies for enhanced microbial fermentation processes
- Author
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Zhang, Le, primary, Lee, Jonathan T.E., additional, Loh, Kai-Chee, additional, Dai, Yanjun, additional, and Tong, Yen Wah, additional
- Published
- 2022
- Full Text
- View/download PDF
4. Functional microbial characteristics in acidogenic fermenters of organic wastes for production of volatile fatty acids
- Author
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Zhang, Le, primary, Yan, Miao, additional, Tsui, To-Hung, additional, Lee, Jonathan T.E., additional, Loh, Kai-Chee, additional, Dai, Yanjun, additional, and Tong, Yen Wah, additional
- Published
- 2022
- Full Text
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5. Contributors
- Author
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Amaro Bittencourt, Gustavo, primary, Bao, Xinhui, additional, Binder Pagnoncelli, Maria Giovana, additional, Bo, Yahui, additional, Cheng, Pengfei, additional, Chu, Ruirui, additional, Cristhian, Chicaiza-Ortiz, additional, Dai, Yanjun, additional, de Carvalho, Júlio César, additional, Ding, Lingkan, additional, Dong, Weiliang, additional, Feng, Yanzhang, additional, He, Chenjun, additional, Hu, Bo, additional, Jiang, Min, additional, Junior Letti, Luiz Alberto, additional, Kang, Xihui, additional, Karp, Susan Grace, additional, Kley Valladares-Diestra, Kim, additional, Lee, Jonathan T.E., additional, Li, Dongyi, additional, Li, Jingyi, additional, Li, Wangliang, additional, Li, Yang, additional, Libardi Junior, Nelson, additional, Lim, Jun Wei, additional, Lin, Richen, additional, Liu, Haojie, additional, Loh, Kai-Chee, additional, Lorenci Woiciechowski, Adenise, additional, Lu, Yandu, additional, Luo, Liwen, additional, Luo, Tao, additional, Murawski de Mello, Ariane Fátima, additional, Murphy, Jerry D, additional, Ng, Nicholas Cheuk Him, additional, Niu, Qigui, additional, Porto de Souza Vandenberghe, Luciana, additional, Qian, Xiujuan, additional, Rodrigues, Cristine, additional, Ruan, Roger, additional, Sarmiento Vásquez, Zulma, additional, Shen, Fei, additional, Shi, Zhiqiang, additional, Soccol, Carlos Ricardo, additional, Song, Liuying, additional, Song, Bing, additional, Tian, Hailin, additional, Tong, Yen Wah, additional, Tsui, To-Hung, additional, Wall, David, additional, Wang, Haixia, additional, Workie, Endashaw, additional, Xu, Chao, additional, Xu, Lijie, additional, Yan, Xiaojun, additional, Yan, Miao, additional, Yuan, Hairong, additional, Zhang, Le, additional, Zhang, Pengshuai, additional, Zhang, Jingxin, additional, Zhang, Tengyu, additional, Zhao, Jun, additional, Zhou, Mi, additional, Zhou, Chengxu, additional, Zhou, Kang, additional, Zhou, Jie Fu J., additional, and Zhou, Jie, additional
- Published
- 2022
- Full Text
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6. On the association between outdoor PM 2.5 concentration and the seasonality of tuberculosis for Beijing and Hong Kong
- Author
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You, Siming, Tong, Yen Wah, Neoh, Koon Gee, Dai, Yanjun, and Wang, Chi-Hwa
- Subjects
complex mixtures - Abstract
Tuberculosis (TB) is still a serious public health problem in various countries. One of the long-elusive but critical questions about TB is what the risk factors are and how they contribute for its seasonality. An ecologic study was conducted to examine the association between the variation of outdoor PM2.5 concentration and the TB seasonality based on the monthly TB notification and PM2.5 concentration data of Hong Kong and Beijing. Both descriptive analysis and Poisson regression analysis suggested that the outdoor PM2.5 concentration could be a potential risk factor for the seasonality of TB disease. The significant relationship between the number of TB cases and PM2.5 concentration was not changed when regression models were adjusted by sunshine duration, a potential confounder. The regression analysis showed that a 10 μg/m3 increase in PM2.5 concentrations during winter is significantly associated with a 3% (i.e. 18 and 14 cases for Beijing and Hong Kong, respectively) increase in the number of TB cases notified during the coming spring or summer for both Beijing and Hong Kong. Three potential mechanisms were proposed to explain the significant relationship: (1) increased PM2.5 exposure increases host's susceptibility to TB disease by impairing or modifying the immunology of the human respiratory system; (2) increased indoor activities during high outdoor PM2.5 episodes leads to an increase in human contact and thus the risk of TB transmission; (3) the seasonal change of PM2.5 concentration is correlated with the variation of other potential risk factors of TB seasonality. Preliminary evidence from the analysis of this work favors the first mechanism about the PM2.5 exposure-induced immunity impairment. This work adds new horizons to the explanation of the TB seasonality and improves our understanding of the potential mechanisms affecting TB incidence, which benefits the prevention and control of TB disease.
- Published
- 2016
7. Meeting the heavy-metal safety requirements for food crops by using biochar: An investigation using sunflower as a representative plant under different atmospheric CO 2 concentrations.
- Author
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Wang Y, Lin G, Li X, Tai MH, Song S, Tan HTW, Leong K, Yip EYB, Lee GYC, Dai Y, and Wang CH
- Subjects
- Carbon Dioxide, Soil, Charcoal, Crops, Agricultural, Helianthus, Soil Pollutants analysis, Metals, Heavy analysis
- Abstract
Global warming impacts on plant growth and food safety are emerging topics of concern, while biochar as a soil additive benefits plants. This study investigates (1) sunflower plant growth at various biochar concentrations in a soil-compost growing substrate under both ambient (420 ppm) and elevated (740 ppm) atmospheric CO
2 concentrations, and (2) concentrations of heavy metals in the growing substrates and organs of the plants. The elevated CO2 concentration benefits the vegetative parts but harms the reproductive parts of the plants. Additionally, the elevated CO2 concentration inhibits the beneficial effects that biochar confers on the plants at the ambient concentration. The optimum biochar concentration at both CO2 levels was found to be 15%. At the time of harvest, most of the heavy-metal concentrations in the growing substrate increased. It was demonstrated that biochar can reduce the amount of heavy metals that accumulate in the roots and seeds whose heavy-metal concentrations complied with Singapore food safety regulations, while those for the biochar met the proposed Singapore biochar standard's thresholds. Our results show that the proposed Singapore biochar standard is practical and sound., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)- Published
- 2023
- Full Text
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8. Methodological framework for wastewater treatment plants delivering expanded service: Economic tradeoffs and technological decisions.
- Author
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Tsui TH, Zhang L, Zhang J, Dai Y, and Tong YW
- Subjects
- Biofuels, Refuse Disposal methods, Waste Management methods, Water Purification
- Abstract
With emerging decarbonization to deploy more integrated waste management, there is a burgeoning need for re-managing waste-related infrastructures in urban environments. Wastewater treatment plants are key contributors to expanded environmental services, but relevant technological decisions and economic tradeoffs have to be assessed from a systems perspective. This study provides a methodological framework that consolidates the multiple technological and economic aspects of system retrofitting for such an evaluation purpose. Complex leachate from refuse transfer stations has been recently identified as the decarbonization roadblock of urban waste management, and it was chosen for investigations by this new methodological approach. The system impacts by complex leachate on the existing facilities were validated by experimental trials. To derive the financial outlooks for decision making, the evaluation matrix includes the quantitative impacts of bioenergy profiles, energy balance analysis of biogas utilization methods, needs of system retrofitting, economic factors, and their uncertainties. Due to the detected inefficiency of bioenergy recovery, bioinformatic analysis was proceeded for understanding the underlying mechanism to propose a mitigation solution. Overall, the methodological framework can provide a quantitative assessment of the centralized capability of wastewater treatment plants for systems planning in the new policy agenda of urban decarbonization, where the methodological potentials of expanded framework applications are also highlighted., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
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9. Gasification biochar from horticultural waste: An exemplar of the circular economy in Singapore.
- Author
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Arora S, Jung J, Liu M, Li X, Goel A, Chen J, Song S, Anderson C, Chen D, Leong K, Lim SH, Fong SL, Ghosh S, Lin A, Kua HW, Tan HTW, Dai Y, and Wang CH
- Subjects
- Singapore, Soil, Charcoal, Pyrolysis
- Abstract
Organic waste, the predominant component of global solid waste, has never been higher, resulting in increased landfilling, incineration, and open dumping that releases greenhouse gases and toxins that contribute to global warming and environmental pollution. The need to create and adopt sustainable closed-loop systems for waste reduction and valorization is critical. Using organic waste as a feedstock, gasification and pyrolysis systems can produce biooil, syngas, and thermal energy, while reducing waste mass by as much as 85-95% through conversion into biochar, a valuable byproduct with myriad uses from soil conditioning to bioremediation and carbon sequestration. Here, we present a novel case study detailing the circular economy of gasification biochar in Singapore's Gardens by the Bay. Biochar produced from horticultural waste within the Gardens was tested as a partial peat moss substitute in growing lettuce, pak choi, and pansy, and found to be a viable substitute for peat moss. At low percentages of 20-30% gasification biochar, fresh weight yields for lettuce and pak choi were comparable to or exceeded those of plants grown in pure peat moss. The biochar was also analyzed as a potential additive to concrete, with a 2% biochar mortar compound found to be of suitable strength for non-structural functions, such as sidewalks, ditches, and other civil applications. These results demonstrate the global potential of circular economies based on local biochar creation and on-site use through the valorization of horticultural waste via gasification, generating clean, renewable heat or electricity, and producing a carbon-neutral to -negative byproduct in the form of biochar. They also indicate the potential of scaled-up pyrolysis or gasification systems for a circular economy in waste management., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
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10. Biochar industry to circular economy.
- Author
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Hu Q, Jung J, Chen D, Leong K, Song S, Li F, Mohan BC, Yao Z, Prabhakar AK, Lin XH, Lim EY, Zhang L, Souradeep G, Ok YS, Kua HW, Li SFY, Tan HTW, Dai Y, Tong YW, Peng Y, Joseph S, and Wang CH
- Subjects
- Biomass, Singapore, Soil, Agriculture, Charcoal
- Abstract
Biochar, produced as a by-product of pyrolysis/gasification of waste biomass, shows great potential to reduce the environment impact, address the climate change issue, and establish a circular economy model. Despite the promising outlook, the research on the benefits of biochar remains highly debated. This has been attributed to the heterogeneity of biochar itself, with its inherent physical, chemical and biological properties highly influenced by production variables such as feedstock types and treating conditions. Hence, to enable meaningful comparison of results, establishment of an agreed international standard to govern the production of biochar for specific uses is necessary. In this study, we analyzed four key uses of biochar: 1) in agriculture and horticulture, 2) as construction material, 3) as activated carbon, and 4) in anaerobic digestion. Then the guidelines for the properties of biochar, especially for the concentrations of toxic heavy metals, for its environmental friendly application were proposed in the context of Singapore. The international status of the biochar industry code of practice, feedback from Singapore local industry and government agencies, as well as future perspectives for the biochar industry were explained., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
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11. Co-transesterification of waste cooking oil, algal oil and dimethyl carbonate over sustainable nanoparticle catalysts.
- Author
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Li F, Hülsey MJ, Yan N, Dai Y, and Wang CH
- Abstract
Key challenges for the application of biodiesel include their high acid value, high viscosity, and low ester content. It is essential to develop later-generation biodiesel from unexploited non-food resources for a more sustainable future. Reuse of biowaste is critically important to address these issues of food safety and sustainability. Thus, the co-transesterification of waste cooking oil (WCO), algal oil (AO) and dimethyl carbonate (DMC) for the synthesis of fatty acid methyl esters (FAMEs) was investigated over a series of nanoparticle catalysts containing calcium, magnesium, potassium or nickel under mild reaction conditions. Nanoparticle catalyst samples were prepared from biowaste sources of chicken manure (CM), water hyacinth (WH) and algal bloom (AB), and characterized using XRD, Raman and FESEM techniques for the heterogeneous production of biodiesel. The catalyst was initially prepared by calcination at 850 °C for 4 h in a major presence of Ca
x Mgy CO3 , KCl and K2 CO3 . The WCO and AO co-conversion of 98% and FAMEs co-selectivity of 95% were obtained over CM nanoparticle catalyst under the reaction conditions of 80 °C, 20 mins and DMC to oil molar ratio of 6:1 with 3% catalyst loading and 3% methanol addition. Under the optimum condition, the density, viscosity, and cetane number of the biodiesel were in the range of diesel standards. Nanoparticle catalysts have been proven as a promising sustainable material in the catalytic transesterification of WCO and AO with the major presence of calcium, magnesium and potassium. This study highlights a sustainable approach via biowaste utilization for the enhancement of biodiesel quality with high ester content, low acid value, high cetane number, and low viscosity., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2020 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
12. Microbial biodiesel production from industrial organic wastes by oleaginous microorganisms: Current status and prospects.
- Author
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Zhang L, Loh KC, Kuroki A, Dai Y, and Tong YW
- Subjects
- Esterification, Fermentation, Metabolic Engineering, Biofuels, Industrial Waste
- Abstract
This review aims to encourage the technical development of microbial biodiesel production from industrial-organic-wastes-derived volatile fatty acids (VFAs). To this end, this article summarizes the current status of several key technical steps during microbial biodiesel production, including (1) acidogenic fermentation of bio-wastes for VFA collection, (2) lipid accumulation in oleaginous microorganisms, (3) microbial lipid extraction, (4) transesterification of microbial lipids into crude biodiesel, and (5) crude biodiesel purification. The emerging membrane-based bioprocesses such as electrodialysis, forward osmosis and membrane distillation, are promising approaches as they could help tackle technical challenges related to the separation and recovery of VFAs from the fermentation broth. The genetic engineering and metabolic engineering approaches could be applied to design microbial species with higher lipid productivity and rapid growth rate for enhanced fatty acids synthesis. The enhanced in situ transesterification technologies aided by microwave, ultrasound and supercritical solvents are also recommended for future research. Technical limitations and cost-effectiveness of microbial biodiesel production from bio-wastes are also discussed, in regard to its potential industrial development. Based on the overview on microbial biodiesel technologies, an integrated biodiesel production line incorporating all the critical technical steps is proposed for unified management and continuous optimization for highly efficient biodiesel production., (Copyright © 2020 Elsevier B.V. All rights reserved.)
- Published
- 2021
- Full Text
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13. Biochar for urban agriculture: Impacts on soil chemical characteristics and on Brassica rapa growth, nutrient content and metabolism over multiple growth cycles.
- Author
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Song S, Arora S, Laserna AKC, Shen Y, Thian BWY, Cheong JC, Tan JKN, Chiam Z, Fong SL, Ghosh S, Ok YS, Li SFY, Tan HTW, Dai Y, and Wang CH
- Subjects
- Agriculture, Charcoal, Nutrients, Brassica rapa, Soil
- Abstract
With possible food crises looming in the near future, urban farming, including small-scale community and home gardens for home consumption, presents a promising option to improve food security in cities. These small-scale farms and gardens often use planter boxes and raised beds filled with lightweight soil or potting mixes. While previous studies on biochar focused on its application on large-scale contiguous farmlands, this study aimed to evaluate the suitability of biochar as a partial soil substitute to produce a durable and lightweight soil-biochar mix for small-scale urban farms. The effects of biochar on the chemical properties of the soil-biochar mix, crop yield and, particularly, crop nutrients and metabolic content were assessed. A germination test using pak choi seeds (Brassica rapa L. cultivar group Pak choi, Green-Petioled Form) showed that the biochar contained phytostimulants. Through a nursery pot experiment over four growth cycles, biochar treatments performed better than pure soil at retaining water-soluble NO
3 - and K+ ions, but were worse at retaining PO4 3- ions. Nonetheless, despite its positive effect on soil NO3 - retention, biochar application did not improve crop yield significantly when the application rate varied from 0% to 60% (v/v). Untargeted metabolomic analyses showed that biochar application may increase the production of carbohydrates and certain flavonoids and glucosinolates. The results of this study showed that biochar can potentially be used to improve pak choi nutritional values and applied in large quantity to obtain a lightweight soil mix for urban farming., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2020
- Full Text
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14. Evaluation of combustion properties and pollutant emission characteristics of blends of sewage sludge and biomass.
- Author
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Wang Y, Liu Y, Yang W, Zhao Q, and Dai Y
- Subjects
- Biomass, Environmental Pollutants, Thermogravimetry, Wood, Sewage
- Abstract
The combustion and emission characteristics of sludge, biomass (rice husk, peanut husk, pine sawdust) and their blends were studied by non-isothermal thermogravimetry, tube oven method and SEM. The results showed that the combustion process of sludge, biomass and their blends could be divided into three stages: the evaporation of water, the release and combustion of volatile, combustion of char. Combustion characteristics of 80% biomass +20% sludge were improved compared with the theoretical value. NO
x and SO2 emission of 80% biomass +20% sludge was lower than that of sludge combustion. There was synergistic effect between sludge/biomass combustion. Comparing combustion and emission characteristics comprehensively, the mixed fuels of 80% biomass +20% sludge could promote combustion and reduce emissions, which was a better method to treat municipal sludge., Competing Interests: Declaration of competing interest There is no conflict of interest., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2020
- Full Text
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15. A comparison of PM exposure related to emission hotspots in a hot and humid urban environment: Concentrations, compositions, respiratory deposition, and potential health risks.
- Author
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You S, Yao Z, Dai Y, and Wang CH
- Abstract
Particle number concentration, particle size distribution, and size-dependent chemical compositions were measured at a bus stop, alongside a high way, and at an industrial site in a tropical city. It was found that the industry case had 4.93×10
7 -7.23×107 and 3.44×104 -3.69×104 #/m3 higher concentration of particles than the bus stop and highway cases in the range of 0.25-0.65μm and 2.5-32μm, respectively, while the highway case had 6.01×105 and 1.86×103 #/m3 higher concentration of particles than the bus stop case in the range of 0.5-1.0μm and 5.0-32μm, respectively. Al, Fe, Na, and Zn were the most abundant particulate inorganic elements for the traffic-related cases, while Zn, Mn, Fe, and Pb were abundant for the industry case. Existing respiratory deposition models were employed to analyze particle and element deposition distributions in the human respiratory system with respect to some potential exposure scenarios related to bus stop, highway, and industry, respectively. It was shown that particles of 0-0.25μm and 2.5-10.0μm accounted for around 74%, 74%, and 70% of the particles penetrating into the lung region, respectively. The respiratory deposition rates of Cr and Ni were 170 and 220 ng/day, and 55 and 140ng/day for the highway and industry scenarios, respectively. Health risk assessment was conducted following the US EPA supplemented guidance to estimate the risk of inhalation exposure to the selected elements (i.e. Cr, Mn, Ni, Pb, Se, and Zn) for the three scenarios. It was suggested that Cr poses a potential carcinogenic risk with the excess lifetime cancer risk (ELCR) of 2.1-98×10-5 for the scenarios. Mn poses a potential non-carcinogenic risk in the industry scenario with the hazard quotient (HQ) of 0.98. Both Ni and Mn may pose potential non-carcinogenic risk for people who are involved with all the three exposure scenarios., (Copyright © 2017 Elsevier B.V. All rights reserved.)- Published
- 2017
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16. Toxicity assessment of carbon black waste: A by-product from oil refineries.
- Author
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Zhen X, Ng WC, Fendy, Tong YW, Dai Y, Neoh KG, and Wang CH
- Subjects
- Apoptosis drug effects, Cell Line, Glutathione metabolism, Hep G2 Cells, Humans, Industrial Waste analysis, Membrane Potential, Mitochondrial drug effects, Metals, Heavy adverse effects, Metals, Heavy analysis, Microscopy, Confocal, Particle Size, Petroleum Pollution analysis, Reactive Oxygen Species, Singapore, Soot analysis, Superoxide Dismutase metabolism, Industrial Waste adverse effects, Petroleum Pollution adverse effects, Soot toxicity
- Abstract
In Singapore, approximately 30t/day of carbon-based solid waste are produced from petrochemical processes. This carbon black waste has been shown to possess physical properties that are characteristic of a good adsorbent such as high external surface area. Therefore, there is a growing interest to reutilize and process this carbon black waste into secondary materials such as adsorbents. However, the carbon black waste obtained from petrochemical industries may contain heavy metals that are hazardous to human health and the environment, hence restricting its full potential for re-utilization. Therefore, it is important to examine the possible toxicity effects and toxicity mechanism of carbon black waste on human health. In this study, inductively coupled plasma optical emission spectroscopy (ICP-OES) analysis showed that the heavy metals, vanadium (V), molybdenum (Mo) and nickel (Ni), were present in the carbon black waste in high concentrations. Three human cell lines (HepG2 cells, MRC-5 cells and MDA-MB-231 cells) were used to investigate the toxicity of carbon black waste extract in a variety of in vitro assays. Results from MTS assays indicated that carbon black waste extract decreased the viability of all three cell lines in a dose and time-dependent manner. Observations from confocal microscopy further confirmed this phenomenon. Flow cytometry assay also showed that carbon black waste extract induced apoptosis of human cell lines, and the level of apoptosis increased with increasing waste concentration. Results from reactive oxygen species (ROS) assay indicated that carbon black waste extract induced oxidative stress by increasing intracellular ROS generation in these three human cell lines. Moreover, induction of oxidative damage in these cells was also observed through the alteration of glutathione (GSH) and superoxide dismutase (SOD) activities. Last but not least, by treating the cells with V-spiked solution of concentration equivalent to that found in the carbon black waste extract, V was identified as the main culprit for the high toxicity of carbon black waste extract. These findings could potentially provide insight into the hazards of carbon black waste extract and its toxicity mechanism on human cell lines., (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Published
- 2017
- Full Text
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17. Chemically treated carbon black waste and its potential applications.
- Author
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Dong P, Maneerung T, Ng WC, Zhen X, Dai Y, Tong YW, Ting YP, Koh SN, Wang CH, and Neoh KG
- Subjects
- Adsorption, Cell Line, Cell Survival drug effects, Fibroblasts drug effects, Humans, Lung cytology, Lung drug effects, Particle Size, Soot toxicity, Surface Properties, Hazardous Waste analysis, Nickel isolation & purification, Refuse Disposal methods, Soot chemistry, Vanadium isolation & purification
- Abstract
In this work, carbon black waste - a hazardous solid residue generated from gasification of crude oil bottom in refineries - was successfully used for making an absorbent material. However, since the carbon black waste also contains significant amounts of heavy metals (especially nickel and vanadium), chemical leaching was first used to remove these hazardous impurities from the carbon black waste. Acid leaching with nitric acid was found to be a very effective method for removal of both nickel and vanadium from the carbon black waste (i.e. up to 95% nickel and 98% vanadium were removed via treatment with 2M nitric acid for 1h at 20°C), whereas alkali leaching by using NaOH under the same condition was not effective for removal of nickel (less than 10% nickel was removed). Human lung cells (MRC-5) were then used to investigate the toxicity of the carbon black waste before and after leaching. Cell viability analysis showed that the leachate from the original carbon black waste has very high toxicity, whereas the leachate from the treated samples has no significant toxicity. Finally, the efficacy of the carbon black waste treated with HNO
3 as an absorbent for dye removal was investigated. This treated carbon black waste has high adsorption capacity (∼361.2mgdye /gcarbonblack ), which can be attributed to its high specific surface area (∼559m2 /g). The treated carbon black waste with its high adsorption capacity and lack of cytotoxicity is a promising adsorbent material. Moreover, the carbon black waste was found to show high electrical conductivity (ca. 10S/cm), making it a potentially valuable source of conductive material., (Copyright © 2016 Elsevier B.V. All rights reserved.)- Published
- 2017
- Full Text
- View/download PDF
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