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Characterization of Fe(III)-saturated montmorillonite and evaluation its sorption behavior for U(VI)

文献类型：期刊论文

作者Lu, Songhua1,2; Tan, Xiaoli1; Yu, Shujun1,2; Ren, Xuemei1; Chen, Changlun1
刊名RADIOCHIMICA ACTA
出版日期2016-07-01
卷号104期号:7页码:481-490
关键词Sorption u(Vi) Fe(Iii)-mmt Characterization
DOI10.1515/ract-2015-2569
文献子类Article
英文摘要Radioactive waste is usually sealed in steel canisters surrounded by a layer of compacted clay back-fill, and permanent buried in a deep geological repository. Unavoidably, the radionuclide contaminants can be released from repository and then sorbed onto the waste container corrosion products or the Fe-rich minerals. Herein, we characterized the Fe(III)-saturated montmorillonite (Fe(III)-MMT) by using Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET), and found the changes of the surface incorporating Fe(III) and surface micropores. The sorption of U(VI) on Fe(III)-MMT and Na-montmorillonite (Na-MMT) was investigated by batch experiments. The larger surface area and cation exchange capacity, and the existence of Fe(III) (hydr) oxide phases in Fe(III)-MMT contributed greatly to its sorption capacity. In the whole pH range, the sorption of U(VI) on Fe(III)-MMT was higher than on Na-MMT, and the sorption was strongly depended on pH and ionic strength. The sorption isotherms were simulated well by the Langmuir and Freundlich models. The thermodynamic parameters (Delta H, Delta S and Delta G) calculated from the temperature dependent sorption isotherms indicated that the sorption of U(VI) on Fe(III)-MMT was an endothermic and spontaneous process. The observations suggest that the interactions between U(VI) and Fe(III)-MMT are important in controlling U(VI) retention. The phenomena need to be considered in risk assessment and reactive transport modeling.
WOS关键词NA-MONTMORILLONITE ; FE-MONTMORILLONITE ; IRON OXYHYDROXIDE ; AQUEOUS-SOLUTION ; MX-80 BENTONITE ; ADSORPTION ; REMOVAL ; URANIUM(VI) ; SILICATE ; SURFACE
WOS研究方向Chemistry ; Nuclear Science & Technology
语种英语
WOS记录号WOS:000379762600004
资助机构NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; NSFC(21377132 ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; Chinese National Fusion Project for ITER(2013GB110004) ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 41273134 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21307135 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 21225730 ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202) ; 91326202)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/21694]  
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.Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, POB 1126, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式
GB/T 7714		 Lu, Songhua,Tan, Xiaoli,Yu, Shujun,et al. Characterization of Fe(III)-saturated montmorillonite and evaluation its sorption behavior for U(VI)[J]. RADIOCHIMICA ACTA,2016,104(7):481-490.
APA Lu, Songhua,Tan, Xiaoli,Yu, Shujun,Ren, Xuemei,&Chen, Changlun.(2016).Characterization of Fe(III)-saturated montmorillonite and evaluation its sorption behavior for U(VI).RADIOCHIMICA ACTA,104(7),481-490.
MLA Lu, Songhua,et al."Characterization of Fe(III)-saturated montmorillonite and evaluation its sorption behavior for U(VI)".RADIOCHIMICA ACTA 104.7(2016):481-490.

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来源：合肥物质科学研究院

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