Enzymatically induced phosphate precipitation (EIPP) for stabilization/ solidification (S/S) treatment of heavy metal tailings
文献类型：期刊论文
| 作者 | Han, Li-Jun2,5; Li, Jiang-Shan1,5; Xue, Qiang5 ; Guo, Ming-Zhi4; Wang, Ping5; Poon, Chi Sun1,3
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| 刊名 | CONSTRUCTION AND BUILDING MATERIALS
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| 出版日期 | 2022-01-03 |
| 卷号 | 314页码:11 |
| 关键词 | Enzymatically induced phosphate precipitation (EIPP) Stabilization solidification (S S) Tailings Unconfined compressive strength Leaching |
| ISSN号 | 0950-0618 |
| DOI | 10.1016/j.conbuildmat.2021.125577 |
| 英文摘要 | The accumulation of heavy metal tailings has caused serious environmental and geological concerns. Therefore, treatment and recycling of heavy metal tailings have become urgent and vital. To this end, this paper proposes a biological solidification and stabilization (S/S) method, which applies enzymatically induced phosphate precipitation (EIPP) to strengthen Pb-Zn tailings and reduce the hazard of the heavy metals. The effectiveness and mechanism of EIPP-S/S have been systematically explored, including the effect of enzyme and reactant concentration, and tailings density on the treatment efficiency. The results showed that MgHPO4(H2O)3 (newberyite) and Pb9(PO4)6 were the main products of EIPP. The newberyite strengthened the tailings through connecting tailing particles and filling the pores, and the solidification effect was positively related to the reactant content and tailing compactness. The strength of the treated tailing sample could reach 2.7 MPa at a relative density of 90% with a reactant concentration of 1.5 M. After treatment, about 40% of Pb in the tailings changed from an acid-soluble state to oxidation state and residual state, as a result of the precipitation of Pb9(PO4)6. The concentration of leached Pb from the treated tailings under an acid rain environment was reduced from 0.86 mg/L before treatment to less than 0.02 mg/L, well below the limit of 0.1 mg/L in China's ground/surface water. This study provides new insights into the treatment and reuse of tailings by applying an innovative EIPP-S/S method, which can flexibly treat tailings in an environmentally friendly manner. |
| 资助项目 | National Key Research and Development Programme[2019YFC1804002] ; International Partnership Program of Chinese Academy of Sciences[115242KYSB20200002] ; National Natural Science Foundation of China/Hong Kong Research Grants Council Joint Research Scheme[51861165104] ; CAS Pioneer Hundred Talents Program in China ; Open Research Fund of State Key Laboratory of Geo-mechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, China[Z020012] |
| WOS研究方向 | Construction & Building Technology ; Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000722661200001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28302]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiang-Shan |
| 作者单位 | 1.IRSM CAS, HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China 4.Hohai Univ, Coll Mech & Mat, Nanjing 213022, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Han, Li-Jun,Li, Jiang-Shan,Xue, Qiang,et al. Enzymatically induced phosphate precipitation (EIPP) for stabilization/ solidification (S/S) treatment of heavy metal tailings[J]. CONSTRUCTION AND BUILDING MATERIALS,2022,314:11. |
| APA | Han, Li-Jun,Li, Jiang-Shan,Xue, Qiang,Guo, Ming-Zhi,Wang, Ping,&Poon, Chi Sun.(2022).Enzymatically induced phosphate precipitation (EIPP) for stabilization/ solidification (S/S) treatment of heavy metal tailings.CONSTRUCTION AND BUILDING MATERIALS,314,11. |
| MLA | Han, Li-Jun,et al."Enzymatically induced phosphate precipitation (EIPP) for stabilization/ solidification (S/S) treatment of heavy metal tailings".CONSTRUCTION AND BUILDING MATERIALS 314(2022):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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