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Immobilization of high-Pb contaminated soil by oxalic acid activated incinerated sewage sludge ash*

文献类型：期刊论文

作者Li, Jiang-shan1,2; Wang, Qiming2,3; Chen, Zhen1,2; Xue, Qiang1,2; Chen, Xin1,2; Mu, Yanhu4; Poon, Chi Sun2,3
刊名ENVIRONMENTAL POLLUTION
出版日期2021-09-01
卷号284期号:-页码:8
关键词Lead contaminated soil Sewage sludge ash Immobilization Leachability Oxalic acid
ISSN号0269-7491
DOI10.1016/j.envpol.2021.117120
英文摘要Identifying effective and low-cost agents for the remediation of Pb-contaminated soil is of great importance for field-scale applications. In this study, the feasibility of reusing incinerated sewage sludge ash (ISSA), a waste rich in phosphorus, under activation by oxalic acid (OA) for the remediation of highPb contaminated soil was investigated. ISSA and OA were mixed at different proportions for the treatment of the high-Pb contaminated soil (5000 mg/kg). The Pb immobilization efficacy was further examined by both the standard deionized water leaching test and the toxicity characteristic leaching procedure (TCLP). The overall results showed that the use of the ISSA alone and an appropriate mixture of the ISSA and OA could effectively reduce the leachability of Pb from soil. 20% ISSA together with 30% OA (0.2 mol/L) reduced leached Pb concentration by 99%. The main stabilization mechanisms were then explored by different microstructural and spectroscopic analytical techniques including SEM, XRD and FTIR. Apparently, OA released phosphate from the ISSA and Pb from soil via acid attack, which combined and precipitated as stable lead phosphate minerals. However, excessive OA could cause high leaching of phosphate and zinc from the ISSA. Overall, this study indicates that ISSA could be used together with OA to remediate high-Pb contaminated soil, but careful design of mix proportions is necessary before practical application to avoid excessive leaching of phosphate and zinc from the ISSA. 0 2021 Elsevier Ltd. All rights reserved.
资助项目National Key Research and Development Program[2019YFC1804002] ; National Science Fund for Distinguished Young Scholars[51625903] ; National Natural Science Foundation of China/Hong Kong Research Grants Council, University Grants Committee Joint Research Scheme[51861165104] ; Special Fund for Basic Research on Science Instruments of the National Science Foundation of China[51827814] ; Open Fund of State Key Laboratory of Frozen Soil Engineering[SKLFSE201806]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000672532400016
出版者ELSEVIER SCI LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/27393]  
专题中科院武汉岩土力学所
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
2.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China
3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China
4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Ground Engn, Lanzhou 730000, Peoples R China
推荐引用方式
GB/T 7714		 Li, Jiang-shan,Wang, Qiming,Chen, Zhen,et al. Immobilization of high-Pb contaminated soil by oxalic acid activated incinerated sewage sludge ash*[J]. ENVIRONMENTAL POLLUTION,2021,284(-):8.
APA Li, Jiang-shan.,Wang, Qiming.,Chen, Zhen.,Xue, Qiang.,Chen, Xin.,...&Poon, Chi Sun.(2021).Immobilization of high-Pb contaminated soil by oxalic acid activated incinerated sewage sludge ash*.ENVIRONMENTAL POLLUTION,284(-),8.
MLA Li, Jiang-shan,et al."Immobilization of high-Pb contaminated soil by oxalic acid activated incinerated sewage sludge ash*".ENVIRONMENTAL POLLUTION 284.-(2021):8.

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来源：武汉岩土力学研究所

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