Environmental performance of unfired bricks produced from co-disposal of mine tailings and municipal solid waste incineration fly ash based on comprehensive leaching tests
文献类型：期刊论文
| 作者 | Wang, Ping1,3; Li, Jiangshan3; Hu, Yuanan2; Cheng, Hefa1 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2024-04-15 |
| 卷号 | 347页码:10 |
| 关键词 | Solidification/stabilization Waste co-disposal Unfired brick Heavy metals Leaching Waste management |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2024.123795 |
| 英文摘要 | The potential leaching of heavy metals is a crucial concern for construction materials produced from solidification/stabilization (S/S) treatment of wastes. This study comprehensively evaluated the leaching characteristics of heavy metals from the unfired bricks produced from co-disposal of Pb-Zn mine tailings and municipal solid waste incineration fly ash using batch, sequential, and semi-dynamic leaching tests. The results show that S/S treatment drastically reduced the leachability of heavy metals from the unfired bricks through lowering their distribution in the acid-soluble fraction. The effective diffusion coefficients of heavy metals within unfired bricks were all below 1.55 x 10(-13) cm(2)/s, which is indicative of low mobility in the environment. The release of heavy metals from the unfired bricks was primarily governed by diffusion and dissolution. Slaking treatment of fly ash significantly reduced the leaching of heavy metals from the unfired bricks due to their improved structural integrity and compactness, which minimizes the surface area in the solid matrix accessible by the leaching medium. The leachability indices of heavy metals within the unfired bricks ranged from 13.12 to 18.10, suggesting that they are suitable for "controlled utilization" in specific scenarios. Compared to untreated mine tailings, converting them into unfired bricks could reduce the releases of heavy metals by several to hundreds of folds. These findings demonstrate that S/S can be an effective and sustainable strategy for co-disposal of mining tailings and incineration fly ash to produce construction materials with sound long-term environmental performance. |
| 资助项目 | Natural Science Foundation of China[42077110] ; Natural Science Foundation of China[42107185] ; Natural Science Foundation of China[42277226] ; Natural Science Foundation of China[41725015] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001219149300001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/41299]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cheng, Hefa |
| 作者单位 | 1.Peking Univ, Coll Urban & Environm Sci, MOE Lab Earth Surface Proc, Beijing 100871, Peoples R China 2.China Univ Geosci Beijing, Sch Water Resources & Environm, MOE Lab Groundwater Circulat & Evolut, Beijing 100083, Peoples R China 3.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 | Wang, Ping,Li, Jiangshan,Hu, Yuanan,et al. Environmental performance of unfired bricks produced from co-disposal of mine tailings and municipal solid waste incineration fly ash based on comprehensive leaching tests[J]. ENVIRONMENTAL POLLUTION,2024,347:10. |
| APA | Wang, Ping,Li, Jiangshan,Hu, Yuanan,&Cheng, Hefa.(2024).Environmental performance of unfired bricks produced from co-disposal of mine tailings and municipal solid waste incineration fly ash based on comprehensive leaching tests.ENVIRONMENTAL POLLUTION,347,10. |
| MLA | Wang, Ping,et al."Environmental performance of unfired bricks produced from co-disposal of mine tailings and municipal solid waste incineration fly ash based on comprehensive leaching tests".ENVIRONMENTAL POLLUTION 347(2024):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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