期刊
SEPARATION SCIENCE AND TECHNOLOGY
卷 48, 期 14, 页码 2196-2203出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2013.793199
关键词
DNPPA; Nd; rare earths; SLM
The transport behavior of Nd (III) through a supported liquid membrane (SLM) containing PTFE as support with organophosphorus extractant dinonyl phenyl phosphoric acid (DNPPA) carrier has been studied. The effect of neutral donors such as TOPO (tri-n-octyl phosphine oxide) TBP (tri-n-butyl phosphate), TEHP (tris 2-ethylhexyl phosphate) and Cyanex 923 (a mixture of four trialkyl phosphine oxides) in combination with DNPPA on transport of Nd (III) from HCl across SLM has been examined and the following trend was observed: TOPO>Cyanex 923>TBP>TEHP. The effect of experimental variables such as feed acidity (0.5 to 5M HCl), neodymium metal ion concentration (6.94x10(-4) to 6.94x10(-3)M), DNPPA concentration (0.2 to 0.6M), stripping reagents in the receiving phase on Nd (III) transport across SLM were investigated. The percentage transport of Nd (III) was 97% after 6hr run with 0.6 MDNPPA+0.13 MTOPO as carrier. The permeability of Nd (III) decreased with increase in HCl and Nd (III) concentration in the feed solution. The transport of Nd (III) decreased with increase in membrane thickness as well as with decrease in pore size. Under optimized conditions transport behavior of other rare earths was also investigated independently, the trend observed was: La>PrNd>Sm>Eu>Gd>Tb>Dy>Ho>Er>Tm>LuY.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据