| 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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| 引用本文： | Chang-sheng Yue,Ben Peng,Wei Tian,Guang-hua Lu,Gui-bo Qiu,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[J]. 矿物冶金与材料学报, 2019, 26(9): 1105-1112. DOI: 10.1007/s12613-019-1819-4 |
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| 作者姓名： | Chang-sheng Yue Ben Peng Wei Tian Guang-hua Lu Gui-bo Qiu Mei Zhang |
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| 作者单位： | Central Research Institute of Building and Construction Co., Ltd., Metallurgical Corporation of China Group(MCC Group), Beijing 100088, China |
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| 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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| 关 键 词： | severely As-contaminated soil non-toxic stabilizers combining stabilization pre-oxidation |
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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