Field evaluation of a new hydroxyapatite based binder for ex-situ solidification/stabilization of a heavy metal contaminated site soil around a Pb-Zn smelter
文献类型：期刊论文
| 作者 | Xia, Wei-Yi1,2; Du, Yan-Jun2; Li, Fa-Sheng3; Guo, Guan-Lin3; Yan, Xiu-Lan4 ; Li, Chun-Ping5; Arulrajah, Arul6; Wang, Fei2; Wang, Shui1
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| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
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| 出版日期 | 2019-06-20 |
| 卷号 | 210页码:278-288 |
| ISSN号 | 0950-0618 |
| 关键词 | Contaminated soil Ex-situ solidification and stabilization Leachability Penetration resistance X-ray diffraction |
| DOI | 10.1016/j.conbuildmat.2019.03.195 |
| 通讯作者 | Du, Yan-Jun(duyanjun@seu.edu.cn) |
| 英文摘要 | This study presents a field trial of ex-situ solidification/stabilization of heavy metal contaminated soils using a new hydroxyapatite based binder SPC (superphosphate and calcium oxide). The field performance including electrical conductivity (EC), heavy metal and chemical oxygen demand (COD) leachability, and penetration resistance of stabilized soils up to 256 days after treatment is investigated. Moreover, acid neutralization capacity (ANC), metal speciation, and soil mineralogy analyses are performed to elucidate the heavy metal immobilization mechanisms. The results indicate that the stabilized soils have lower EC values than untreated soils, indicating the lower soluble salt contents in stabilized soils. Ex-situ treatment can significantly reduce acid soluble fraction contents and leachability of lead, zinc and cadmium in soils as a consequence. Decrease in COD leachability is observed during the curing period up to 256 days. Additionally, SPC stabilized soils give superior mechanical properties as indicated by their higher penetration resistance values as compared to the untreated soils. The improvement in ANC and reduction in acid soluble fraction resulting from the formation of phosphate-based precipitates are mainly responsible for the reduced heavy metal leachability of stabilized soils. Additionally, ex-situ SPC treatment is found to be effective in improving soil spatial homogeneity. (C) 2019 Elsevier Ltd. All rights reserved. |
| WOS关键词 | MICROSTRUCTURAL CHARACTERISTICS ; STABILIZED ZN ; FREEZE-THAW ; STRENGTH ; ADSORPTION ; LEAD |
| 资助项目 | National High Technology Research and Development Program of China[2013AA06A206] ; National Natural Science Foundation of China[41472258] ; Environmental Protection Scientific Research Project of Jiangsu Province[2016031] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000466823800026 |
| 资助机构 | National High Technology Research and Development Program of China ; National Natural Science Foundation of China ; Environmental Protection Scientific Research Project of Jiangsu Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/59625]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Du, Yan-Jun |
| 作者单位 | 1.Jiangsu Prov Acad Environm Sci, Jiangsu Prov Key Lab Environm Engn, Nanjing 210036, Jiangsu, Peoples R China 2.Southeast Univ, Inst Geotech Engn, Jiangsu Key Lab Urban Underground Engn & Environm, Nanjing 210096, Jiangsu, Peoples R China 3.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 5.Beijing Bldg Mat Acad Sci Res, State Key Lab Solid Waste Resources Utilizat & En, Beijing 100041, Peoples R China 6.Swinburne Univ Technol, Dept Civil & Construct Engn, Hawthorn, Vic 3122, Australia |
| 推荐引用方式 GB/T 7714 | Xia, Wei-Yi,Du, Yan-Jun,Li, Fa-Sheng,et al. Field evaluation of a new hydroxyapatite based binder for ex-situ solidification/stabilization of a heavy metal contaminated site soil around a Pb-Zn smelter[J]. CONSTRUCTION AND BUILDING MATERIALS,2019,210:278-288. |
| APA | Xia, Wei-Yi.,Du, Yan-Jun.,Li, Fa-Sheng.,Guo, Guan-Lin.,Yan, Xiu-Lan.,...&Wang, Shui.(2019).Field evaluation of a new hydroxyapatite based binder for ex-situ solidification/stabilization of a heavy metal contaminated site soil around a Pb-Zn smelter.CONSTRUCTION AND BUILDING MATERIALS,210,278-288. |
| MLA | Xia, Wei-Yi,et al."Field evaluation of a new hydroxyapatite based binder for ex-situ solidification/stabilization of a heavy metal contaminated site soil around a Pb-Zn smelter".CONSTRUCTION AND BUILDING MATERIALS 210(2019):278-288. |
入库方式： OAI收割
来源：地理科学与资源研究所
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