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New insights into Th(IV) speciation on sepiolite: Evidence for EXAFS and modeling investigation

文献类型：期刊论文

作者Hu, Baowei1; Hu, Qingyuan2; Chen, Chengguang2; Sun, Yubing3,4; Xu, Di5; Sheng, Guodong1
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2017-08-15
卷号322页码:66-72
关键词Sepiolite Th(Iv) Exafs Surface Complexation Modeling Adsorption Mechanism
DOI10.1016/j.cej.2017.04.013
文献子类Article
英文摘要The interaction mechanism of Th(IV) on sepiolite was investigated by batch, EXAFS and surface complexation modeling. The batch experiments revealed that the sorption of Th(IV) on sepiolite remarkably decreased with increasing of ionic strength at pH <5.0, while no effect of ionic strength on Th(IV) removal was observed at pH >5.0. The removal kinetics and isotherms of Th(IV) on sepiolite can be satisfactorily simulated by the pseudo-second-order and Langmuir model, respectively. The analysis of EXAFS spectra for sepiolite-Th(IV) at pH 5.0 and 7.5 indicated that the sorption of Th(IV) on sepiolite at pH 5.0 and 7.5 was inner-sphere surface complexation and surface precipitation, respectively. The results of surface complexation modeling showed that Th(IV) sorption on sepiolite can be fitted by a cation exchange sites (X4Th species) at pH <4.5, an inner-sphere surface complexation (SOTh3+ species) at near neutral and a surface precipitation at pH >7.0 very well. These findings are crucial for the evaluation of fate and transport of Th(IV) at water-mineral interface. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词HUMIC SUBSTANCE INTERACTION ; NANOSCALE ZEROVALENT IRON ; GRAPHENE OXIDE NANOSHEETS ; LAYERED DOUBLE HYDROXIDE ; SURFACE COMPLEXATION ; CARBON NANOTUBES ; COMBINED BATCH ; ENHANCED SEQUESTRATION ; AQUEOUS-SOLUTIONS ; INTERACTION MECHANISM
WOS研究方向Engineering
语种英语
WOS记录号WOS:000401594200007
资助机构Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Natural Science Foundation of China(21207092 ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; Science and Technology Project of Shaoxing(2014B70041) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093) ; 21577093)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33419]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China
2.Shaoxing Univ, Yuanpei Coll, Dept Architectural Engn, Shaoxing 312000, Peoples R China
3.Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, POB 1126, Hefei 230031, Peoples R China
4.Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China
5.Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Jiangsu, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Baowei,Hu, Qingyuan,Chen, Chengguang,et al. New insights into Th(IV) speciation on sepiolite: Evidence for EXAFS and modeling investigation[J]. CHEMICAL ENGINEERING JOURNAL,2017,322:66-72.
APA Hu, Baowei,Hu, Qingyuan,Chen, Chengguang,Sun, Yubing,Xu, Di,&Sheng, Guodong.(2017).New insights into Th(IV) speciation on sepiolite: Evidence for EXAFS and modeling investigation.CHEMICAL ENGINEERING JOURNAL,322,66-72.
MLA Hu, Baowei,et al."New insights into Th(IV) speciation on sepiolite: Evidence for EXAFS and modeling investigation".CHEMICAL ENGINEERING JOURNAL 322(2017):66-72.

入库方式： OAI收割

来源：合肥物质科学研究院

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