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| Research progress on the stability of ferrihydrite structure and its application in arsenic fixation |
| Received:October 23, 2019 |
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| KeyWord:iron oxide;transformation;stability;influencing factor |
| Author Name | Affiliation | E-mail | | YANG Zhong-lan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | | | ZENG Xi-bai | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | zengxibai@caas.cn | | SUN Ben-hua | College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China | sunbenhua@126.com | | BAI Ling-yu | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | SU Shi-ming | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | WANG Ya-nan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | | | WU Cui-xia | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Key Laboratory of Agro-Environment of Ministry of Agriculture and Rural Affairs, Beijing 100081, China | |
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| Abstract: |
| Ferrihydrite is the most commonly and effectively used passivator in ameliorating arsenic-contaminated soils and waters. Iron oxides, including ferrihydrite, have a significant effect on the occurrence form and bioavailability of arsenic, and a strong fixation effect on arsenic in the environment. However, ferrihydrite can be easily transformed in the environment, and this significantly affects the treatment effect of arsenic. Here, we highlighted the ferrihydrite structure and factors affecting its stability. Furthermore, we summarized the interaction between ferrihydrite and arsenic in order to discuss the feasibility of ameliorating arsenic-contaminated soil using ferrihydrite, and thus provided a theoretical basis in this regard. We also discussed the amelioration of arsenic-contaminated farmland and safe utilization techniques from the perspective of reducing arsenic bioavailability in farmlands. |
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