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Aqueous Fe(II)-Induced Phase Transformation of Ferrihydrite Coupled Adsorption/Immobilization of Rare Earth Elements
Yingheng Fei;  Jian Hua;  Chengshuai Liu;  Fangbai Li;  Zhenke Zhu;  Tangfu Xiao;  Manjia Chen;  Ting Gao;  Zhiqi Wei;  Likai Hao
2018
Source PublicationMinerals
Volume8Issue:8Pages:1-13
Abstract

The phase transformation of iron minerals induced by aqueous Fe(II) (Fe(II)(aq)) is a critical geochemical reaction which greatly affects the geochemical behavior of soil elements. How the geochemical behavior of rare earth elements (REEs) is affected by the Fe(II)(aq)-induced phase transformation of iron minerals, however, is still unknown. The present study investigated the adsorption and immobilization of REEs during the Fe(II)(aq)-induced phase transformation of ferrihydrite. The results show that the heavy REEs of Ho(III) were more efficiently adsorbed and stabilized compared with the light REEs of La(III) by ferrihydrite and its transformation products, which was due to the higher adsorptive affinity and smaller atomic radius of Ho(III). Both La(III) and Ho(III) inhibited the Fe atom exchange between Fe(II)(aq) and ferrihydrite, and sequentially, the Fe(II)(aq)-induced phase transformation rates of ferrihydrite, because of the competitive adsorption with Fe(II)(aq) on the surface of iron (hydr)oxides. Owing to the larger amounts of adsorbed and stabilized Ho(III), the inhibition of the Fe(II)(aq)-induced phase transformation of ferrihydrite affected by Ho(III) was higher than that by La(III). Our findings suggest an important role for the Fe(II)(aq)-induced phase transformation of iron (hydr)oxides in assessing the mobility and transfer behavior of REEs, as well as for their occurrence in earth surface environments.

KeywordFerrihydrite Recrystallization Rees Stabilization Fe Atom Exchange
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8854
Collection环境地球化学国家重点实验室
Affiliation1.Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Guangdong Institute of Eco-Environmental Sciences & Technology, Guangzhou 510650, China
2.Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
3.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
4.Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
Recommended Citation
GB/T 7714
Yingheng Fei;Jian Hua;Chengshuai Liu;Fangbai Li;Zhenke Zhu;Tangfu Xiao;Manjia Chen;Ting Gao;Zhiqi Wei;Likai Hao. Aqueous Fe(II)-Induced Phase Transformation of Ferrihydrite Coupled Adsorption/Immobilization of Rare Earth Elements[J]. Minerals,2018,8(8):1-13.
APA Yingheng Fei;Jian Hua;Chengshuai Liu;Fangbai Li;Zhenke Zhu;Tangfu Xiao;Manjia Chen;Ting Gao;Zhiqi Wei;Likai Hao.(2018).Aqueous Fe(II)-Induced Phase Transformation of Ferrihydrite Coupled Adsorption/Immobilization of Rare Earth Elements.Minerals,8(8),1-13.
MLA Yingheng Fei;Jian Hua;Chengshuai Liu;Fangbai Li;Zhenke Zhu;Tangfu Xiao;Manjia Chen;Ting Gao;Zhiqi Wei;Likai Hao."Aqueous Fe(II)-Induced Phase Transformation of Ferrihydrite Coupled Adsorption/Immobilization of Rare Earth Elements".Minerals 8.8(2018):1-13.
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