Complete stabilization of severely As-contaminated soil by a simple H2O2 pre-oxidation method combined with non-toxic TMT-15 and FeCl3&#183;6H2O

Chang-sheng Yue; Ben Peng; Wei Tian; Guang-hua Lu; Gui-bo Qiu; Mei Zhang

doi:10.1007/s12613-019-1819-4

Volume 26 Issue 9

Sep. 2019

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文章导航 > 矿物冶金与材料学报（英文） > 2019 > 26(9): 1105-1112

Chang-sheng Yue, Ben Peng, Wei Tian, Guang-hua Lu, Gui-bo Qiu, and Mei Zhang, Complete stabilization of severely As-contaminated soil by a simple H₂O₂ pre-oxidation method combined with non-toxic TMT-15 and FeCl₃·6H₂O, Int. J. Miner. Metall. Mater., 26(2019), No. 9, pp. 1105-1112. https://doi.org/10.1007/s12613-019-1819-4

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Chang-sheng Yue, Ben Peng, Wei Tian, Guang-hua Lu, Gui-bo Qiu, and Mei Zhang, Complete stabilization of severely As-contaminated soil by a simple H2O2 pre-oxidation method combined with non-toxic TMT-15 and FeCl3·6H2O, Int. J. Miner. Metall. Mater., 26(2019), No. 9, pp. 1105-1112. https://doi.org/10.1007/s12613-019-1819-4

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研究论文

Complete stabilization of severely As-contaminated soil by a simple H₂O₂ pre-oxidation method combined with non-toxic TMT-15 and FeCl₃·6H₂O

Central Research Institute of Building and Construction Co., Ltd., Metallurgical Corporation of China Group(MCC Group), Beijing 100088, China
National Engineering Research Center for Industrial Environmental Protection, Beijing 100088, China
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

通讯作者:
Mei Zhang E-mail: zhangmei@ustb.edu.cn

中文摘要

The stabilization of severely As-polluted soil has been a challenge, especially for the extremely toxic As(Ⅲ) contaminants. In this study, soil with a high As concentration (26084 mg/kg) was availably stabilized by a H₂O₂ pre-oxidation assisted TMT-15 (Na₃S₃C₃N₃ solution with a mass fraction of 15%) and FeCl₃·6H₂O stabilization method. The results showed that the combination of the two stabilizers (i.e., TMT-15 and FeCl₃·6H₂O) presented a better stabilization behavior than either stabilizer used individually. The use of the H₂O₂ pre-oxidation assisted TMT-15 and FeCl₃·6H₂O stabilization approach not only converted the As(Ⅲ) to As(V) but also reduced the toxic leaching concentration of As to 1.61 mg/L, which is a safe level, when the additions of TMT-15 and FeCl₃·6H₂O were 2 mL and 0.20 g, respectively. Thus, using only a simple H₂O₂ pre-oxidation to combine clean stabilization with non-toxic stabilizers TMT-15 and FeCl₃·6H₂O could render the severely As-contaminated soil safe for disposal in a landfill.

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Complete stabilization of severely As-contaminated soil by a simple H₂O₂ pre-oxidation method combined with non-toxic TMT-15 and FeCl₃·6H₂O

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Abstract

Abstract

The stabilization of severely As-polluted soil has been a challenge, especially for the extremely toxic As(Ⅲ) contaminants. In this study, soil with a high As concentration (26084 mg/kg) was availably stabilized by a H₂O₂ pre-oxidation assisted TMT-15 (Na₃S₃C₃N₃ solution with a mass fraction of 15%) and FeCl₃·6H₂O stabilization method. The results showed that the combination of the two stabilizers (i.e., TMT-15 and FeCl₃·6H₂O) presented a better stabilization behavior than either stabilizer used individually. The use of the H₂O₂ pre-oxidation assisted TMT-15 and FeCl₃·6H₂O stabilization approach not only converted the As(Ⅲ) to As(V) but also reduced the toxic leaching concentration of As to 1.61 mg/L, which is a safe level, when the additions of TMT-15 and FeCl₃·6H₂O were 2 mL and 0.20 g, respectively. Thus, using only a simple H₂O₂ pre-oxidation to combine clean stabilization with non-toxic stabilizers TMT-15 and FeCl₃·6H₂O could render the severely As-contaminated soil safe for disposal in a landfill.
- severely As-contaminated soil;
- non-toxic stabilizers;
- combining stabilization;
- pre-oxidation

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Complete stabilization of severely As-contaminated soil by a simple H₂O₂ pre-oxidation method combined with non-toxic TMT-15 and FeCl₃·6H₂O

中文摘要

Complete stabilization of severely As-contaminated soil by a simple H₂O₂ pre-oxidation method combined with non-toxic TMT-15 and FeCl₃·6H₂O

Abstract

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