Mechanistic Study for Antimony Adsorption and Precipitation on Hematite Facets
文献类型：期刊论文
| 作者 | Yan, Li ; Chan, Tingshan; Jing, Chuanyong
|
| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-03-01 |
| 卷号 | 56期号:5页码:3138-3146 |
| 关键词 | IRON MOBILITY BEHAVIOR OXIDE |
| ISSN号 | 0013-936X |
| 英文摘要 | Heterogeneous reactions at the mineral-water interface are of paramount importance in controlling the transport of contaminants. Herein, antimony (Sb) adsorption and subsequent precipitation on Fe2O3 facets were explored to understand its partitioning mechanisms by multiple complementary techniques. Our extended X-ray absorption fine structure spectroscopy and density functional theory results provided a consensus on the local coordination environment of Sb(III) and Sb(V) on Fe2O3 facets. We observed that Sb adsorption and the following precipitation are associated with both Sb concentrations and Fe2O3 facets, and a change in the Sb surface-binding mode from edge-sharing to corner-sharing is preferred in precipitation. Fe2O3 facets determine Sb binding structures, resulting in a facet-dependent transformation of adsorption to precipitation. The preferred corner-sharing complexes on the {001} facet facilitated the formation of Sb2O3 and NaSb(OH)(6) precipitates at a lower Sb concentration compared with other two {110} and {214} facets. In addition, the facet-specific binding configuration renders a heterogeneous epitaxial growth of Sb2O3. Our study provides a molecular understanding of facet effects on Sb adsorption and precipitation on minerals. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47573]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 通讯作者 | Jing, Chuanyong |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China 2.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan 3.Shandong Univ, Sch Environm Sci & Engn, Qingdao 266237, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yan, Li,Chan, Tingshan,Jing, Chuanyong. Mechanistic Study for Antimony Adsorption and Precipitation on Hematite Facets[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022,56(5):3138-3146. |
| APA | Yan, Li,Chan, Tingshan,&Jing, Chuanyong.(2022).Mechanistic Study for Antimony Adsorption and Precipitation on Hematite Facets.ENVIRONMENTAL SCIENCE & TECHNOLOGY,56(5),3138-3146. |
| MLA | Yan, Li,et al."Mechanistic Study for Antimony Adsorption and Precipitation on Hematite Facets".ENVIRONMENTAL SCIENCE & TECHNOLOGY 56.5(2022):3138-3146. |
入库方式： OAI收割
来源：生态环境研究中心
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