Assessment of semi-dynamic leaching characteristics of lead and zinc from stabilized contaminated soil using sustainable phosphate-based binder after carbonation
文献类型：期刊论文
| 作者 | Wei, Mingli1,2,5; Li, Yuan2,3; Yu, Bowei4; Liu, Lei2,3; Xue, Qiang2,3 ; Du, Yanjun5
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| 刊名 | JOURNAL OF CLEANER PRODUCTION
 |
| 出版日期 | 2022-01-15 |
| 卷号 | 332期号:-页码:- |
| 关键词 | Stabilization Heavy metal contaminated soil Semi-dynamic leaching Carbonation Diffusion coefficient |
| ISSN号 | 0959-6526 |
| 英文摘要 | Stabilized contaminated soils face long-term complex environmental effects in the process of sustainable resource reuse. Therefore, semi-dynamic leaching tests in this study were conducted to investigate the leaching characteristics of novel sustainable phosphate binder stabilized soil contaminated with lead (Pb) and zinc (Zn) after carbonation in various simulated acid rain solutions to verify the sustainability of stabilization. Immobilization mechanisms of Pb and Zn, carbonation impact, leaching concentrations, pH, electrical conductivity, desorption parameters, leaching mechanisms, observed/effective diffusion coefficient (D-obs/D-eff), and leachability index were investigated. Complexation or adsorption of heavy metals can reduce the number of exchangeable ions, especially after carbonation. Carbonization showed a beneficial effect, indicating that the stabilized materials are a good carbon catcher. The leaching mechanism of Pb and Zn were all controlled by diffusion, which was caused by complex destruction and desorption. Dobs values for Pb ranged from 10(-19) to 10(-16) m(2)/s, and those for Zn from 10-17 to 10(-13) m(2)/s. Therefore, the mobilization of Zn was more intense than that of Pb. D-eff values, calculated through the desorption parameter, were ~3-4 orders of magnitude larger than D-obs values. The leaching characteristics of Pb and Zn were influenced by leachant pH and carbonation, which were related to electrical conductivity and the cumulative leaching mass of magnesium. The effects had an influence on hydration products' chemical stability and buffering capacity. The stabilized materials can be used as recycled material in engineering, judging from the leachability index. This study can improve researchers' and engineers' understanding of the environmental leaching and toxicity of stabilized contaminated soil during reutilization, increasing reliability in reusing contaminated soil resources. |
| 学科主题 | Science & Technology - Other Topics ; Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000773652200002 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35356]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Jiangsu Institute of Zoneco Co., Ltd., Yixing, 214200, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China 3.University of Chinese Academy of Sciences, Beijing, 100049, China 4.Specialist Testing Department, Alliance Geotechnical, 2147, Australia 5.Institute of Geotechnical Engineering, Southeast University, Nanjing, 210096, China |
| 推荐引用方式 GB/T 7714 | Wei, Mingli,Li, Yuan,Yu, Bowei,et al. Assessment of semi-dynamic leaching characteristics of lead and zinc from stabilized contaminated soil using sustainable phosphate-based binder after carbonation[J]. JOURNAL OF CLEANER PRODUCTION,2022,332(-):-. |
| APA | Wei, Mingli,Li, Yuan,Yu, Bowei,Liu, Lei,Xue, Qiang,&Du, Yanjun.(2022).Assessment of semi-dynamic leaching characteristics of lead and zinc from stabilized contaminated soil using sustainable phosphate-based binder after carbonation.JOURNAL OF CLEANER PRODUCTION,332(-),-. |
| MLA | Wei, Mingli,et al."Assessment of semi-dynamic leaching characteristics of lead and zinc from stabilized contaminated soil using sustainable phosphate-based binder after carbonation".JOURNAL OF CLEANER PRODUCTION 332.-(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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