The Experts below are selected from a list of 21318 Experts worldwide ranked by ideXlab platform
Jianguo Jiang - One of the best experts on this subject based on the ideXlab platform.
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Phosphate microbial mineralization consolidation of Waste Incineration fly ash and removal of lead ions
Ecotoxicology and environmental safety, 2020Co-Authors: Jianguo JiangAbstract:Abstract This paper proposes a green environment-friendly Bacillus subtilis to mineralize and consolidate Waste Incineration fly ash and heavy metal cations, and there is no harmful by-product in the mineralization process. Different phosphate products can be prepared, and are more stable than the microbially-induced carbonate precipitation (MICP) in nature. Typical heavy metal oxides were mainly PbO, ZnO, CdO, NiO, CuO and Cr2O3 in the chemical composition of Waste Incineration fly ash. Microstructure and chemical composition of Waste Incineration fly ash before and after treatment were characterized by powder X-ray diffraction (XRD) analysis and scanning electron microscopy. Scanning electron microscopy (SEM) images showed that the morphology of the Bacillus subtilis was mainly a rod-like structure. The optimal hydrolysis dosage of the organic phosphate monoester sodium salt was 0.2mol in the bacterial solution (1L, 20 g/L). The optimum required mass of the bacterial powder was 15 g/kg in treatment process of the Waste Incineration fly ash. The initial concentration of lead ions was 40.28 mg/L in Waste Incineration fly ash solution. After the optimum dosage treatment, the removal efficiency of lead ions was 78.15%, 79.64%, 77.70% and 80.14% when curing time was 1, 2, 4 and 6d, respectively. The Waste Incineration fly ash had a Shore hardness of 22 after the optimum amount of bacterial liquid treatment. Results of wind erosion test showed that the wind erosion rate of Waste Incineration fly ash was 2.6, 0, 0, 0, 0 and 0 g/h when blank group, deionized water, 100, 200, 300 and 400 mL of bacterial solutions treated, respectively. The bio-mineralization method provides an approach for the safe disposal of heavy metals in the contaminated areas of tailings, electroplating sewage, Waste Incineration plants, and so on.
Zhang Tao - One of the best experts on this subject based on the ideXlab platform.
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Experimental Research on Compressive Strength of Waste Incineration Bottom Ash Concrete
Bulletin of the Chinese ceramic society, 2010Co-Authors: Zhang TaoAbstract:The bottom ash was used as concrete coarse aggregate and study the failure mode of Waste Incineration bottom ash concrete,the relationship between compressive strength and bottom ash coarse aggregate replacement rate,water cement ratio,apparent density and development trend of compressive strength were studied.The failure mode of Waste Incineration bottom ash concrete is similar to normal concrete and acicular content has effect on compressive strength.Bottom ash coarse aggregate replacement rate has different effects on compressive strength in different water cement ratio.Compressive strength of Waste Incineration bottom ash concrete has the same development trend with normal concrete.Compressive strength and apparent density has a linear relation.We can produce economical C20,C25 and C30 concrete by choosing the best bottom ash coarse aggregate replacement rate and water cement ratio.
Donggeun Sul - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of immuno- and reproductive toxicities and association between immunotoxicological and genotoxicological parameters in Waste Incineration workers.
Toxicology, 2005Co-Authors: Eunil Lee, Hyung Sik Kang, Woon Won Jung, Nam Hee Won, Eun-mi Kim, Donggeun SulAbstract:In this study, we investigated immunotoxicity levels of 2,3,7,8-tetrachlorodibenzo-p-dioxin in 31 Waste Incineration workers and in 84 control subjects, and evaluated the association between immunological and genotoxicological parameters. DNA damage in mononuclear and polynuclear lymphocytes, and the level of the urinary metabolites, 1-OHP and 2-naphthol, were evaluated in both Waste Incineration workers and control subjects. Significant differences were detected in these values between exposed and control groups. Number of sperms was lower in the Waste Incineration workers than in the control subjects, as was the percentage of motile sperms, but a significant difference existed only in the number of sperms (p=0.05). DNA damage in the spermatozoa of Waste Incineration workers and control subjects measured 1.40+/-0.08 and 1.26+/-0.03, respectively (p=0.001). Specific surface antigens of peripheral lymphocytes, namely, CD3, CD4, CD8, CD19, and CD69 were used to measure immune status in Waste Incineration workers and control subjects. There was no significant difference in T- and B-cell profiles showed between Waste Incineration workers and control subjects (p=0.684 and 0.157). In addition, the ratio of T helper cells to T cytotoxic cells was also not remarkably different between groups (p=0.174). However, T-cell activation was found to be significantly higher in the Waste Incineration workers than in the control subjects (p=0.001), although B-cell activation did not exhibit this trend. The levels of two cytokines (IL-4 an INF-gamma) and four immunoglobulins (IgA, IgE, IgG, and IgM) were also measured in the experimental population. All immunoglobulin types were found in lower amounts in the Waste Incineration workers, but this diaparity was not significant one. In addition, the levels of two cytokines, IL-4 and INF-gamma, were also found to be lower in the Waste Incineration workers than in the control subjects, and only in IL-4 was a significant difference determined to exist.
Enhua Yang - One of the best experts on this subject based on the ideXlab platform.
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review of leaching behavior of municipal solid Waste Incineration mswi ash
Science of The Total Environment, 2019Co-Authors: Hongwei Luo, Ying Cheng, Enhua YangAbstract:Incineration is widely adopted in modern Waste management because it provides an effective way to minimize municipal solid Waste that needs to be disposed of in landfills. The ash residue is often disposed by landfilling. Alternatively, the Incineration ash may be recycled and reused for various applications. The crucial issues, however, are the leaching of harmful elements during the use and the end-of-life phases. This review summarizes extensive studies on leaching behavior of municipal solid Waste Incineration ash. Specifically, pollutants generated through leaching, factors governing leaching, methodologies to study leaching, leaching mechanisms, and treatments to reduce leaching. Many types of pollutants are generated through leaching from municipal solid Waste Incineration ash, in which heavy metals and organic contaminants are the most toxic and concerned. Ash properties, pH and liquid to solid ratio are the main factors governing municipal solid Waste Incineration ash leaching. Leaching behavior of municipal solid Waste Incineration ash is complicated and existing methods to evaluate leaching may not be able to represent the field conditions. Solubility and sorption are the two major leaching mechanisms. Many treatment methods have been proposed. However, not all methods are effective and some approaches are associated with high energy and high cost, which makes them less economically feasible and attractive.
Kim Maree Johannessen - One of the best experts on this subject based on the ideXlab platform.
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The regulation of municipal Waste Incineration ash: A legal review and update
Journal of Hazardous Materials, 1996Co-Authors: Kim Maree JohannessenAbstract:After years of legal debate, the nation's highest court has finally decided that ash generated by municipal Waste Incineration (MWI ash) must be regulated under the federal statutory provisions governing the generation, handling and disposal of hazardous Waste. This paper will examine the legislative history of the federal statutory provision at the center of the decade-long debate. It will also discuss the judicial, regulatory and legislative developments concerning the regulation of ash from municipal Waste Incineration.
