中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Uptake Mechanisms of Eu(III) on Hydroxyapatite: A Potential Permeable Reactive Barrier Backfill Material for Trapping Trivalent Minor Actinides

文献类型:期刊论文

作者Xu, L; Zheng, T; Yang, ST; Zhang, LJ; Wang, JQ; Liu, W; Chen, LH; Juan, DW; Chai, ZF; Wang, S
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期2016
卷号50期号:7页码:3852—3859
关键词GROUNDWATER REMEDIATION AQUEOUS-SOLUTIONS METAL REMOVAL SORPTION PHOSPHATE EXAFS DISSOLUTION AMERICIUM BATCH ACID
ISSN号0013-936X
通讯作者Yang, ST ; Wang, S (reprint author), Soochow Univ, Sch Radiol & Interdisciplinary Sci RAD X, Suzhou 215123, Peoples R China. ; Yang, ST ; Wang, S (reprint author), Jiangsu Higher Educ Inst, Collaborat Innovat Ctr Radiat Med, Suzhou 215123, Peoples R China.
英文摘要The permeable reactive barrier (PRB) technique has attracted an increasing level of attention for the in situ remediation of contaminated groundwater. In this study, the macroscopic uptake behaviors and microscopic speciation of Eu(III) on hydroxyapatite (HAP) were investigated by a combination of theoretical modeling, batch experiments, powder X-ray diffraction (PXRD) fitting, and X-ray absorption spectroscopy (XAS). The underlying removal mechanisms were identified to further assess the application potential of HAP as an effective PRB backfill material. The macroscopic analysis revealed that nearly all dissolved Eu(III) in solution was removed at pH 6.5 within an extremely short reaction time of 5 min. In addition, the thermodynamic calculations, desorption experiments, and PXRD and XAS analyses definitely confirmed the formation of the EuPO4 center dot H2O(s) phase during the process of uptake of dissolved Eu(III) by HAP via the dissolution precipitation mechanism. A detailed comparison of the present experimental findings and related HAP metal systems suggests that the relative contribution of precipitation to the total Eu(III) removal increases as the P:Eu ratio decreases. The dosage of HAP-based PRB for the remediation of groundwater polluted by Eu(III) and analogous trivalent actinides [e.g., Am(III) and Cm(III)] should be strictly controlled depending on the dissolved Eu(III) concentration to obtain an optimal P:M (M represents Eu, Am, or Cm) ratio and treatment efficiency.
收录类别SCI
语种英语
WOS记录号WOS:000373655800065
源URL[http://ir.sinap.ac.cn/handle/331007/25888]  
专题上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式
GB/T 7714
Xu, L,Zheng, T,Yang, ST,et al. Uptake Mechanisms of Eu(III) on Hydroxyapatite: A Potential Permeable Reactive Barrier Backfill Material for Trapping Trivalent Minor Actinides[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(7):3852—3859.
APA Xu, L.,Zheng, T.,Yang, ST.,Zhang, LJ.,Wang, JQ.,...&Wang, S.(2016).Uptake Mechanisms of Eu(III) on Hydroxyapatite: A Potential Permeable Reactive Barrier Backfill Material for Trapping Trivalent Minor Actinides.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(7),3852—3859.
MLA Xu, L,et al."Uptake Mechanisms of Eu(III) on Hydroxyapatite: A Potential Permeable Reactive Barrier Backfill Material for Trapping Trivalent Minor Actinides".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.7(2016):3852—3859.

入库方式: OAI收割

来源:上海应用物理研究所

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