Deep insight on mechanism and contribution of As(V) removal by thermal modification waste concrete powder
文献类型：期刊论文
| 作者 | Ma, Zihan4; Li, Jiang-shan3,4; Xue, Qiang3,4 ; Zhan, Baojian2; Chen, Xin4; Wan, Yong4; Zhao, Yaqin1; Sun, Yuehui4; Poon, Chi Sun3
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| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
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| 出版日期 | 2022-02-10 |
| 卷号 | 807页码:13 |
| ISSN号 | 0048-9697 |
| 关键词 | Waste concrete powder (WCP) Arsenic Adsorption Thermal modification |
| DOI | 10.1016/j.scitotenv.2021.150764 |
| 英文摘要 | Expanding the utilization strategy of waste concrete powder (WCP) is conducive to minimizing the environmental burden caused by construction & demolition wastes (C&DW). In this study, WCP prepared in the laboratory was thermally treated and used to remove As(V) from wastewater. Batch adsorption tests were implemented to explore the influence factors such as modification temperature (0-850 degrees C), pH (1.00-12.00), dosage (2-50 g/L), co-coexisting ions (SO42-, NO3-, Cl- and PO43-) and temperature (25-45 degrees C). Various methods including spectroscopic tests, Rietveld refinement and sequential extraction process were employed to examine the mechanisms and their contribution to As(V) removal. Results show that the As(V) removal capacity of WCP was slightly enhanced after treatment at 200 degrees C, the pseudo-second-order kinetics model and Langmuir model could describe the adsorption process well. The maximum uptake capacity for As (V) calculated by Langmuir model at 25, 35 and 45 degrees C were 31.89, 25.56 and 17.42 mg/g respectively, and the removal rate reached a maximum of 95.37% (C-0 = 100 mg/L). Thermodynamically, the As(V) elimination was exothermic and spontaneous. The ettringite produced by rehydration of WCP proved to be essential for As (V) removal. Electrostatic attraction, precipitation, complexation and ion exchange were identified to be the main mechanisms of As(V) adsorption. This study confirmed the potential of WCP in removing As(V) from wastewater and provided a new insight into the removal mechanisms. (C) 2021 Elsevier B.V. All rights reserved. |
| 资助项目 | National Key Research and Development Program[2019YFC1804002] ; Funds for International Cooperation and Exchange of the National Natural Science Foundation of China[51861165104] ; CAS Pioneer Hundred Talents Program in China ; Youth Innovation Promotion Association CAS[2021327] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000707666100010 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/28510]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Li, Jiang-shan; Wan, Yong |
| 作者单位 | 1.China Univ Min & Technol, Sch Environm Sci & Spatial Informat, 1 Daxue Rd, Xuzhou 221116, Jiangsu, Peoples R China 2.Shenzhen Univ, Coll Civil & Transportat Engn, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen, Peoples R China 3.IRSM CAS HK PolyU Joint Lab Solid Waste Sci, Wuhan 430071, 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 | Ma, Zihan,Li, Jiang-shan,Xue, Qiang,et al. Deep insight on mechanism and contribution of As(V) removal by thermal modification waste concrete powder[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,807:13. |
| APA | Ma, Zihan.,Li, Jiang-shan.,Xue, Qiang.,Zhan, Baojian.,Chen, Xin.,...&Poon, Chi Sun.(2022).Deep insight on mechanism and contribution of As(V) removal by thermal modification waste concrete powder.SCIENCE OF THE TOTAL ENVIRONMENT,807,13. |
| MLA | Ma, Zihan,et al."Deep insight on mechanism and contribution of As(V) removal by thermal modification waste concrete powder".SCIENCE OF THE TOTAL ENVIRONMENT 807(2022):13. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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