Extraction of rubidium and cesium from brine solutions using a room temperature ionic liquid system containing 18-crown-6-Reference-Cited by-同舟云学术

Extraction of rubidium and cesium from brine solutions using a room temperature ionic liquid system containing 18-crown-6

Published:2018-06-01 Issue:2 Volume:20 Page:40-46
ISSN:1899-4741
Container-title:Polish Journal of Chemical Technology
language:en
Short-container-title:

Author:

Huang Dongfang¹²³,Zheng Hong⁴,Liu Zeyu¹²³,Bao Amin¹²³,Li Bo¹²

Affiliation:

1. Chinese Academy of Sciences , Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources , Qinghai Institute of Salt Lakes , 810008 Xining , China

2. Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources , 810008 Xining , China

3. University of Chinese Academy of Sciences , 100049 Beijing , China

4. Department of Chemistry , Chongqing Normal University , Chongqing , 400047 , China

Abstract

Abstract Application of 1-butyl-3-metyhlimidazaolium hexafluorophosphate ([C4mim][PF6]), in the extraction of rubidium and cesium from brine solutions using 1,4,7,10,13,16-hexaoxacyclooctadecane (18C6) as extractant was investigated. Parameters that affect the extraction including pH of aqueous phase, equilibration time, dosage of the ionic liquid, phase ratio, concentration of 18C6 were studied. Under the optimal conditions, the single extraction efficiency of rubidium ions and cesium ions were up 84.11% and 94.99%, respectively. The stripping of alkali metal ions from the loaded organic phase with different stripping agents and concentrations were also investigated. The initial value of the K/Cs and K/Rb ratios were 93.0 and 104.3, respectively, which have dropped 91.21% and 88.01%, respectively, after the extraction and stripping experiments. It was taken a big step in the separation and enrichment of cesium (rubidium) ion and potassium ion. The extraction mechanism was revealed most likely to be a cation exchange mode in this system.

Publisher

Walter de Gruyter GmbH

Subject

General Chemical Engineering,General Chemistry,Biotechnology

Link

https://www.sciendo.com/pdf/10.2478/pjct-2018-0021

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