Arsenic stabilization performance of a novel starch-modified Fe-Mn binary oxide colloid
文献类型：期刊论文
| 作者 | Yan, Xiulan5; Fei, Yang1,2,5; Zhong, Lirong4; Wei, Wenxia3 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2020-03-10 |
| 期号 | 707页码:136064 |
| ISSN号 | 0048-9697 |
| 关键词 | Starch modification Fe-Mn binary oxide Arsenic Stabilization Adsorption |
| DOI | 10.1016/j.scitotenv.2019.136064 |
| 英文摘要 | Arsenic (As) is an environmentally hazardous contaminant and can be a serious threat to human health. In China, the remediation needs for a large number of As-contaminated sites renders a strong demand for efficient remedial reagents and cost-effective approaches. In this study, a novel starch-modified Fe-Mn binary oxide (SFM), an amorphous colloidal material, has been synthesized as a remedial reagent and its As stabilization performance has been evaluated. A set of laboratory batch experiments were carried outwith SFM of different dosages directly added into three contaminated soils to immobilize As. Results demonstrated that SFM could transform As in soil from non-specifically and specifically sorbed fractions to the more stable form bounded to amorphous iron hydrous oxides, thus reducing the As concentration in TCLP leachates by up to 93.2%. Results from adsorption tests and microscopic analysis indicated that the interactions between SFM and As are mainly controlled by adsorption, oxidation, and precipitation processes. SFM has abundant surface hydroxyl groups, with excellent adsorption properties for both As(V) and As(III), with the maximum adsorption capacities of 160.63 and 284.64 mg/g respectively at pH 7.0. The adsorption process closely fitted pseudo second-order kinetics and Freundlich isotherm model. SFM could increase soil Eh and oxidize As(III) to As(V), which facilitated the As stabilization in soil. Colloidal iron-based material directly used for stabilization in As contaminated soils is reported here for the first time. Starch modification improves both the reactivity and mobility of the stabilization agent in soil. Our findings propose an efficient and convenient reagent for As remediation in soil. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | CONTAMINATED SOILS ; POROUS-MEDIA ; IRON ; ADSORPTION ; IMMOBILIZATION ; REMEDIATION ; SPECIATION ; ADSORBENT ; OXIDATION ; REMOVAL |
| 资助项目 | National Natural Science Foundation of China[41571309] ; National Natural Science Foundation of China[41571309] ; Beijing Science and Technology Plan Project[Z161100001216008] ; Beijing Science and Technology Plan Project[Z161100001216008] ; US Department of Energy[DE-AC06-76RLO 1830] ; U.S. DOE[DE-AC06-76RLO 1830] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000507925700015 |
| 资助机构 | National Natural Science Foundation of China ; Beijing Science and Technology Plan Project ; U.S. DOE |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/132294]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 1.Minist Ecol & Environm, Tech Ctr Soil Agr & Rural Ecol & Environm, Beijing 100012, Peoples R China 2.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China 3.Environm Protect Res Inst Light Ind, Beijing 100089, Peoples R China 4.Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Xiulan,Fei, Yang,Zhong, Lirong,et al. Arsenic stabilization performance of a novel starch-modified Fe-Mn binary oxide colloid[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020(707):136064. |
| APA | Yan, Xiulan,Fei, Yang,Zhong, Lirong,&Wei, Wenxia.(2020).Arsenic stabilization performance of a novel starch-modified Fe-Mn binary oxide colloid.SCIENCE OF THE TOTAL ENVIRONMENT(707),136064. |
| MLA | Yan, Xiulan,et al."Arsenic stabilization performance of a novel starch-modified Fe-Mn binary oxide colloid".SCIENCE OF THE TOTAL ENVIRONMENT .707(2020):136064. |
入库方式： OAI收割
来源：地理科学与资源研究所
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