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Mechanical investigation of U(VI) on pyrrhotite by batch, EXAFS and modeling techniques

文献类型：期刊论文

作者Liu, Haibo1; Zhu, Yuke1; Xu, Bin1; Li, Ping1; Sun, Yubing2; Chen, Tianhu1
刊名JOURNAL OF HAZARDOUS MATERIALS
出版日期2017-01-15
卷号322期号:无页码:488-498
关键词u(Vi) Pyrrhotite Exafs Surface Complexation Modeling
DOI10.1016/j.jhazmat.2016.10.015
文献子类Article
英文摘要The interaction mechanism of U(VI) on pyrrhotite was demonstrated by batch, spectroscopic and modeling techniques. Pyrite was selected as control group in this study. The removal of U(V1) on pyrite and pyrrhotite significantly decreased with increasing ionic strength from 0.001 to 0.1 moliL at pH 2.0-6.0, whereas the no effect of ionic strength was observed at pH > 6.0. The maximum removal capacity of U(V1) on pyrite and pyrrhotite calculated from Langmuir model was 10.20 and 21.34 mg g(-1) at pH 4.0 and 333 K, respectively. The XPS analysis indicated the U(VI) was primarily adsorbed on pyrrhotite and pyrite and then approximately 15.5 and 9.8% of U(VI) were reduced to U(IV) by pyrrhotite and pyrite after 20 days, respectively. Based on the XANES analysis, the adsorption edge of uranium-containing pyrrhotite located between (UO2)-O-IV(s) and (UO22+)-O-VI spectra. The EXAFS analysis demonstrated the inner-sphere surface cornplexation of U(VI) on pyrrhotite due to the occurrence of U-S shell, whereas the U-U shell revealed the reductive co-precipitates of U(VI) on pyrrhotite/pyrite with increasing reaction times. The surface cornplexation modeling showed that outer-and inner-surface complexation dominated the U(VI) removal at pH < 4 and pH > 5.0, respectively. The findings presented herein play a crucial role in the removal of radionuclides on iron sulfide in environmental cleanup applications. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词X-RAY PHOTOELECTRON ; GRAPHENE OXIDE NANOSHEETS ; AQUEOUS-SOLUTIONS ; IRON SULFIDE ; SORPTION COMPLEXES ; SPECTROSCOPIC EVIDENCE ; BACILLUS-SUBTILIS ; CRYSTAL-STRUCTURE ; NITRIC-ACID ; ADSORPTION
WOS研究方向Engineering ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000388059100019
资助机构National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; National Natural Science Foundation of China(41402030 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41072035 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41130206 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41402029 ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029) ; 41572029)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/30810]  
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.Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, POB 1126, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Haibo,Zhu, Yuke,Xu, Bin,et al. Mechanical investigation of U(VI) on pyrrhotite by batch, EXAFS and modeling techniques[J]. JOURNAL OF HAZARDOUS MATERIALS,2017,322(无):488-498.
APA Liu, Haibo,Zhu, Yuke,Xu, Bin,Li, Ping,Sun, Yubing,&Chen, Tianhu.(2017).Mechanical investigation of U(VI) on pyrrhotite by batch, EXAFS and modeling techniques.JOURNAL OF HAZARDOUS MATERIALS,322(无),488-498.
MLA Liu, Haibo,et al."Mechanical investigation of U(VI) on pyrrhotite by batch, EXAFS and modeling techniques".JOURNAL OF HAZARDOUS MATERIALS 322.无(2017):488-498.

入库方式： OAI收割

来源：合肥物质科学研究院

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