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Investigation on extraction behavior and extraction mechanism of uranium(VI) with DGA derivative into organic system from aqueous solution

Lili Xiao, Peng Ren, Yang Li, Rong Hua, Zhifen Wang, Zhanggao Le, Yanxia Geng, and Tao Yu

East China University of Technology, Nanchang, People’s Republic of China

 

E-mail: renp2300@126.com

Abstract: 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.

Keywords: Bisdiglycolamide ; Extraction behavior ; Uranium(VI) ; Extraction mechanism ; Extracted pieces 

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-019-00697-x

 

Chemical Papers 73 (6) 1459–1467 (2019)

Sunday, July 12, 2020

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