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Mutual effect of U(VI) and Sr(II) on graphene oxides: evidence from EXAFS and theoretical calculations

文献类型：期刊论文

作者Cheng, Wencai1,2; Ding, Congcong1,2; Wu, Qunyan3,4; Wang, Xiangxue1,2; Sun, Yubing2; Shi, Weiqun3,4; Hayat, Tasawar5,6; Alsaedi, Ahmed6; Chai, Zhifang3,4,7,8; Wang, Xiangke1,5,7,8
刊名ENVIRONMENTAL SCIENCE-NANO
出版日期2017-05-01
卷号4期号:5页码:1124-1131
DOI10.1039/c7en00114b
文献子类Article
英文摘要The competitive interaction of U(VI) and Sr(II) on graphene oxides (GOs) was studied by batch techniques, EXAFS analysis and DFT calculations. The batch results indicated that decreased sorption of Sr(II) on GOs was observed at C[U(VI)] < 0.2 mmol L-1 and enhanced sorption of Sr(II) was found at C[U(VI)] > 0.2 mmol L-1, whereas the presence of Sr(II) did not affect U(VI) sorption on GOs. The increased sorption of Sr(II) at C[U(VI)] > 0.2 mmol L-1 resulted from the new available sites provided by the precipitated U(VI) or adsorbed hydrolyzed U(VI) species according to EXAFS analysis. The occurrence of a U-C shell in the absence/presence of Sr(II) indicated that U(VI) tended to form inner-sphere surface complexes with GOs. For the Sr(II) interaction, a Sr-C shell was observed at a low U(VI) concentration, but not formed at a high U(VI) concentration, indicating the shift of inner-sphere to outer-sphere surface complexes with increasing U(VI) concentration. According to DFT calculation, the binding energy of GO-U(VI) (e.g., -40.3 kcal mol(-1) for inner-sphere coordination) was significantly lower than that of GO-Sr(II) (-16.4 kcal mol(-1)), demonstrating that U(VI) was preferentially bound to GOs relative to Sr(II). These findings can provide a reliable prediction of the transport and fates of U(VI) and Sr(II) at the water-GO interface and open doorways for the application of GOs.
WOS关键词FINE-STRUCTURE SPECTROSCOPY ; MODELING TECHNIQUES ; AQUEOUS-SOLUTIONS ; FUNCTIONALIZED GRAPHENE ; STRONTIUM SORPTION ; BACILLUS-SUBTILIS ; IONIC-STRENGTH ; BONDING NATURE ; ADSORPTION ; BATCH
WOS研究方向Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics
语种英语
WOS记录号WOS:000401646200014
资助机构Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Natural Science Foundation of China(21577032 ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; 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Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Fundamental Research Funds for the Central Universities(JB2015001) ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection ; Priority Academic Program Development of Jiangsu Higher Education Institutions ; 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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/31844]  
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.North China Elect Power Univ, Sch Environm & Chem Engn, Beijing 102206, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China
3.Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Energy Chem, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst High Energy Phys, Key Lab Biomed Effects Nanomat & Nanosafety, Beijing 100049, Peoples R China
5.King Abdulaziz Univ, DNAAM Res Grp, Fac Sci, Jeddah 21589, Saudi Arabia
6.Quaid I Azam Univ, Dept Math, Islamabad 44000, Pakistan
7.Soochow Univ, Collaborat Innovat Ctr Radiat Med Jiangsu Higher, Suzhou 215123, Peoples R China
8.Soochow Univ, Sch Radiol & Interdisciplinary Sci, Suzhou 215123, Peoples R China
推荐引用方式
GB/T 7714		 Cheng, Wencai,Ding, Congcong,Wu, Qunyan,et al. Mutual effect of U(VI) and Sr(II) on graphene oxides: evidence from EXAFS and theoretical calculations[J]. ENVIRONMENTAL SCIENCE-NANO,2017,4(5):1124-1131.
APA Cheng, Wencai.,Ding, Congcong.,Wu, Qunyan.,Wang, Xiangxue.,Sun, Yubing.,...&Wang, Xiangke.(2017).Mutual effect of U(VI) and Sr(II) on graphene oxides: evidence from EXAFS and theoretical calculations.ENVIRONMENTAL SCIENCE-NANO,4(5),1124-1131.
MLA Cheng, Wencai,et al."Mutual effect of U(VI) and Sr(II) on graphene oxides: evidence from EXAFS and theoretical calculations".ENVIRONMENTAL SCIENCE-NANO 4.5(2017):1124-1131.

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来源：合肥物质科学研究院

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