Study on a novel flat renewal supported liquid membrane with D2EHPA and hydrogen nitrate for neodymium extraction |
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| Authors: | PEI Liang WANG Liming YU Guoqiang |
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| Affiliation: | 1.Key Laboratory of Water Cycle and Related Land Surface Processes,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China;2.Faculty of Water Resources and Hydraulic Power,Xi’an University of Technology,Xi’an 710048,China;3.School of Environment and Chem-istry Engineering,Xi’an Polytechnic University,Xi’an 710048,China) |
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| Abstract: | The Nd(III) extraction in flat renewal supported liquid membrane(FRSLM),with polyvinylidene fluoride membrane and renewal solution including HNO3 solution as the stripping solution and di(2-ethylhexyl) phosphoric acid(D2EHPA) dissolved in kerosene as the membrane solution,was investigated.The effects of pH in the feed phase,volume ratio of membrane solution to stripping solution,concentra-tion of HNO3 solution and concentration of carrier in the renewal phase on extraction of Nd(III) were also studied,respectively.As a result,the optimum extraction conditions of Nd(III) were obtained when concentration of HNO3 solution was 4.00 mol/L,concentration of D2EHPA was 0.100 mol/L,and volume ratio of membrane solution to stripping solution was 1.00 in the renewal phase,and pH was 4.60 in the feed phase.When initial concentration of Nd(III) was 2.00×10-4 mol/L,the extraction percentage of Nd(III) was up to 92.9% in 75 min. |
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| Keywords: | membrane extraction flat renewal supported liquid membrane di(2-ethylhexyl) phosphoric acid neodymium extraction flux rare earths |
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