Investigation on extraction behavior and extraction mechanism of uranium(VI) with DGA derivative into organic system from aqueous solution
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The extraction behavior and mechanism of uranium(VI) from aqueous solution with the multidentate ligand N,N,N″′,N″′-tetraoctyl-N″,N″-ethidene diglycolamide (TOE-BisDGA) as extractant were investigated. The extraction percentages of uranium(VI) were found to increase with increasing aqueous nitric acid solution. The extraction process was deduced to proceed by neutral extraction mechanism or ion association extraction mechanism, and the TOE-BisDGA extractant formed a major 1:1 complex with uranium(VI) in xylene system. The possible molecular structure of extracted pieces were presumed to be [UO2(NO3)2(TOE-BisDGA)] or [UO2(TOE-BisDGA)](NO3)2 or [UO2(NO3)TOE-BisDGA)](NO3) by ESI–MS and extraction mechanism.
KeywordsBisdiglycolamide Extraction behavior Uranium(VI) Extraction mechanism Extracted pieces
Plutonium uranium recovery by extraction
Financial support from National Natural Science Foundation of China (21761002, 21501025), Science and Technology Research Project of Jiangxi Provincial Education Development, China (GJJ170430), Doctoral Research Startup Fund Project of East China University of Technology (DHBK2017133), Jiangxi Provincal Key Laboratory of Mass Spectrometry Science and Instrument Development Fund (JSMS201607), IAEA coordinated research project(IAEA No. 21122) and Defense Foundation Project, China (JCKY2017401C005).
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