Mechanism and effectiveness of enzymatically induced phosphate precipitation (EIPP) in stabilizing coexisting lead, zinc, and cadmium in tailings
文献类型：期刊论文
| 作者 | Han, Lijun1,4; Wang, Ping1,4; Jiang, Xiqing2,4; Wang, Yaoyi3,4; Cao, Shiyu1,4; Li, Jiangshan1,4 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 346页码:11 |
| 关键词 | Composite heavy metals Enzymatically induced phosphate precipitation (EIPP) Pre-activation and re-precipitation Leaching |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2024.123618 |
| 英文摘要 | Lead-zinc (Pb-Zn) tailings ponds carry the risk of multiple heavy metals (HMs) contamination and pile destabilization. This poses requirements for in-situ applicable, low-distribution, and effective stabilization/solidification (S/S) methods. For this, the novel enzymatically induced phosphate precipitation (EIPP) method was implemented in this study. Its mechanism and performance on stabilization of composite Pb, Zn, and cadmium (Cd) in tailings were explored and evaluated under typical erosion conditions for the first time. Results show that the EIPP stabilized HMs by chemically transforming the unstable carbonate-bound HMs to stable phosphate precipitates and by physically encapsulating tailings particles with newberyite precipitates. The stabilization effect on the three HMs was ranked as Pb > Zn > Cd. Comparing magnesium resources for the EIPP reactants, the EIPP utilizing Mg(CH3COO)(2) was more effective at decontamination than MgCl2 because its special pre-activation and re-precipitation function enhanced the chemical transformation function of EIPP. The EIPP stabilization was confirmed to reduce simulated acid rain-leachable and bio-extractive HMs by about 90% and 60%, respectively. Under the prolonged acid attack, treated HMs were ultimately leached through the dissolution mechanism. Zn exhibited significant instability in highly acidic conditions (pH = 2.5-3.5), where its cumulative leaching toxicity after long-term dissolution warrants attention. Overall, EIPP presents a novel and effective strategy for on-site mitigation of composite HMs pollution. |
| 资助项目 | Major Science and Technology Project of Inner Mongolia Autonomous Region[2021ZD0007-02-01] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001202246400001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41123]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiangshan |
| 作者单位 | 1.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, Peoples R China 2.Zhengzhou Univ, Sch Civil Engn, Zhengzhou 450001, Henan, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.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, Lijun,Wang, Ping,Jiang, Xiqing,et al. Mechanism and effectiveness of enzymatically induced phosphate precipitation (EIPP) in stabilizing coexisting lead, zinc, and cadmium in tailings[J]. ENVIRONMENTAL POLLUTION,2024,346:11. |
| APA | Han, Lijun,Wang, Ping,Jiang, Xiqing,Wang, Yaoyi,Cao, Shiyu,&Li, Jiangshan.(2024).Mechanism and effectiveness of enzymatically induced phosphate precipitation (EIPP) in stabilizing coexisting lead, zinc, and cadmium in tailings.ENVIRONMENTAL POLLUTION,346,11. |
| MLA | Han, Lijun,et al."Mechanism and effectiveness of enzymatically induced phosphate precipitation (EIPP) in stabilizing coexisting lead, zinc, and cadmium in tailings".ENVIRONMENTAL POLLUTION 346(2024):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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