Effects of dimethylarsenate coprecipitation with ferrihydrite on Fe (II)-induced mineral transformation and the release of dimethylarsenate
文献类型：期刊论文
| 作者 | Chen, Yi4,5; Quan, Yueyang4,5; Liu, Yipu4,5; Yuan, Meng4,5; Wang, Jiaqi4,5; Chen, Chuan3; Huang, Chuanqin4,5; Fang, Xiaoyu4,5; Zhang, Jing2; Feng, Xionghan4,5 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2025-02-15 |
| 卷号 | 367页码:10 |
| 关键词 | Iron (hydr)oxides Organoarsenicals Coprecipitation Mineral transformation Desorption |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2024.125593 |
| 英文摘要 | Organoarsenicals are toxic pollutants of global concern, and their environmental geochemical behavior might be greatly controlled by iron (Fe) (hydr)oxides through coprecipitation, which is rarely investigated. Here, the effects of the incorporation of dimethylarsenate (DMAs(V)), a typical organoarsenical, into the ferrihydrite (Fh) structure on the mineral physicochemical properties and Fe(II)-induced phase transformation of DMAs(V)-Fh coprecipitates with As/Fe molar ratios up to 0.0876 +/- 0.0036 under anoxic conditions and the accompanying DMAs(V) release were investigated. The presence of DMAs(V) during Fh formation gradually decreases the mineral crystallinity. With increasing DMAs(V) content, the specific surface areas of the coprecipitates are decreased owing to particle aggregation, while the micropore sizes are negligible changed. Fourier transformed infrared (FTIR) and As K-edge X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectroscopy show that, part of DMAs(V) binds to Fh surfaces in the coprecipitates by forming bidentate binuclear inner-sphere complexes through As-O-Fe bonds. During the reaction of the coprecipitate with 1 mM Fe(II) for 336 h, DMAs(V) inhibits the Fh transformation to goethite. No goethite forms at pH 4; at pH 7 low content of DMAs(V) hinders the further conversion of lepidocrocite to goethite, while high content of DMAs (V) completely inhibits goethite formation. DMAs(V) in the coprecipitate is continuously released into the solution, with the released proportion being generally increased with the increase of DMAs(V) content, pH and Fe (II) addition, probably owing to the desorption of weak inner- and outer-sphere DMAs(V) complexes bound on the Fh surfaces upon the Fh aging and transformation to lepidocrocite and goethite. These results provide deep insights into the fate and mobility of organoarsenical pollutants mediated by Fe (hydr)oxides in natural environments, and help design effective and ecofriendly remediation strategies for As polluted soils and sediments. |
| 资助项目 | National Natural Science Foundations of China[42077015] ; National Natural Science Foundations of China[41771267] ; National Natural Science Foundations of China[42177275] ; National Natural Science Foundations of China[42030709] ; Key Sci-ence and Technology Projects of Inner Mongolia autonomous region[2019ZD001] ; Fundamental Research Funds for the Central Universities[103-510320036] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001421360600001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37061]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Huang, Chuanqin; Yin, Hui |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing 100039, Peoples R China 3.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Jiangsu Key Lab Organ Waste Utilizat, Nanjing 210095, Peoples R China 4.Coll Resources & Environm, Hubei Key Lab Soil Environm & Pollut Remediat, Wuhan 430070, Peoples R China 5.Huazhong Agr Univ, Coll Resources & Environm, Key Lab Arable Land Conservat Middle & Lower Reach, Minist Agr & Rural Affairs, Wuhan 430070, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yi,Quan, Yueyang,Liu, Yipu,et al. Effects of dimethylarsenate coprecipitation with ferrihydrite on Fe (II)-induced mineral transformation and the release of dimethylarsenate[J]. ENVIRONMENTAL POLLUTION,2025,367:10. |
| APA | Chen, Yi.,Quan, Yueyang.,Liu, Yipu.,Yuan, Meng.,Wang, Jiaqi.,...&Yin, Hui.(2025).Effects of dimethylarsenate coprecipitation with ferrihydrite on Fe (II)-induced mineral transformation and the release of dimethylarsenate.ENVIRONMENTAL POLLUTION,367,10. |
| MLA | Chen, Yi,et al."Effects of dimethylarsenate coprecipitation with ferrihydrite on Fe (II)-induced mineral transformation and the release of dimethylarsenate".ENVIRONMENTAL POLLUTION 367(2025):10. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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