Extraction of Cesium and Rubidium with 4-tert-butyl-2-(α-methylbenzyl) phenol from Salt Lake Brine

摘要:This work shows the extraction of cesium (Cs^+) and rubidium (Rb^+) from salt lake brine containing potassium (K^+) and magnesium (Mg^2+). The results show that 4-tert-butyl-2-(α-methylbenzyl) phenol ( t -BAMBP) diluted in sulfonated kerosene (SK) has an excellent extraction effect. Infrared spectroscopic studies indicate that polymerize to form the dimer in the t -BAMBP when Cs^+ or Rb^+ were extracted. The effects of K^+, Mg^2+, t -BAMBP concentration, the volume ratio of organic phase to aqueous phase (O/A) and the alkalinity (pH) of aqueous phase were investigated. The K^+ and Mg^2+ should be eliminated through precipitating before the extraction and separation of Cs^+ and Rb^+.The optimum extraction conditions of the experimental brine were as follows: 0.8 mol/L t -BAMBP diluted in SK, pH≥13, a phase ratio of 1:1, and an extraction contact time of 2 min at room temperature. The optimal extraction yields of Cs^+ and Rb^+ were as high as 100% and 85.8%, in addition, 8.76% of K^+ was co-extracted. Further work would increase the extraction yield and selectivity of Rb^+ and realize the efficient separation of Cs^+ and Rb^+ from brine.

关键词:
  • salk  
  • lake  
  • brine  
  • extraction  
  • t  
  • separation  
  • cesium  
  • rubidium  
作者:
PANG; Deng-ke; FU; Zhen-hai; ZHANG; Zhi-hong; ZHANG; Yong-ming; MA; Yan-fang; WANG; Jing; ZHAO; Dong-mei
单位:
Key; Laboratory; of; Comprehensive; and; Highly; Efficient; Utilization; of; Salt; Lake; Resources; Qinghai; Institute; of; Salt; Lakes; Chinese; Academy; of; Sciences; Xining; 810008; China; Key; Laboratory; of; Salt; Lake; Resources; Chemistry; of; Qinghai; Province; Xining; 810008; China; University; of; Chinese; Academy; of; Sciences; Beijing; 100049; China
刊名:
盐湖研究

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期刊名称:盐湖研究

盐湖研究杂志紧跟学术前沿,紧贴读者,国内刊号为:63-1026/P。坚持指导性与实用性相结合的原则,创办于1992年,杂志在全国同类期刊中发行数量名列前茅。