Stabilization of soil arsenic by natural limonite after mechanical activation and the associated mechanisms
文献类型：期刊论文
| 作者 | Yan, Xiulan4; Shao, Jinqiu2,3,4; Wen, Qiqian1; Shen, Junfeng1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-03-15 |
| 期号 | 708页码:135118 |
| 关键词 | Arsenic Limonite Mechanical activation Adsorption Stabilization |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2019.135118 |
| 英文摘要 | Arsenic (As) is an environmentally hazardous contaminant which have a serious threat to human health. In recent years, sustainability has drawn increasing attention in the environmental remediation field. Application of natural minerals as a class of iron-containing materials for soil As remediation is meaningful and challenging. In this paper the As sorption ability and soil stabilization of mechanical activated limonite has been studied. Mechanical activation can effectively enhance the adsorption performance of natural limonite. The positive effect of mechanical activation on limonite mainly include: (1) particle size reduction and specific surface area increase; (2) reduction of limonite crystallinity and increase of surface active sites; (3) mineral phase transformation to amorphous iron oxides substances. The average grain size of limonite reduces from 16.8 mu m to 0.214 mu m after activation while the specific surface area increases from 10.26 m(2)/g to 56.74 m(2)/g. The maximum adsorption capacities of mechanically activated limonite (L-m) for As (III) and As (V) were 9.14 mg/g and 8.26 mg/g, respectively at pH 7.0, higher than untreated limonite (L-0). Mechanically activated limonite can effectively stabilize As in soils. When L-m dosage was 10%, the stabilization effects could reach about 78%. Limonite could transform the soil As from non-specifically and specifically sorbed fraction to amorphous iron hydrous oxides bounded fractions. Mechanically activated limonite (L-m) exhibited good adsorption and stabilization performance advantages for As in soils. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | IRON-OXIDE ; MECHANOCHEMICAL ACTIVATION ; NANOCRYSTALLINE MAGNETITE ; ADSORPTION ; REMOVAL ; SURFACE ; ADSORBENTS ; FERRIHYDRITE ; SORPTION ; FORMS |
| 资助项目 | National Key Research and Development Program of China[2017YFD0800900] ; National Key Research and Development Program of China[2017YFD0800900] ; National Natural Science Foundation of China[41571309] ; National Natural Science Foundation of China[41571309] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000506214900152 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131204]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 2.Beijing Municipal Solid Waste & Chem Management C, Beijing 100089, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Chinese Acad Sci, Key Lab Land Surface Pattern & Simulat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Xiulan,Shao, Jinqiu,Wen, Qiqian,et al. Stabilization of soil arsenic by natural limonite after mechanical activation and the associated mechanisms[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020(708):135118. |
| APA | Yan, Xiulan,Shao, Jinqiu,Wen, Qiqian,&Shen, Junfeng.(2020).Stabilization of soil arsenic by natural limonite after mechanical activation and the associated mechanisms.SCIENCE OF THE TOTAL ENVIRONMENT(708),135118. |
| MLA | Yan, Xiulan,et al."Stabilization of soil arsenic by natural limonite after mechanical activation and the associated mechanisms".SCIENCE OF THE TOTAL ENVIRONMENT .708(2020):135118. |
入库方式： OAI收割
来源：地理科学与资源研究所
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