MEMBRANE EXTRACTION OF SILVER BY DI(2-ETHYLHEXYL)DITHIOPHOSPHORIC ACID

被引：40
|
作者：
BROMBERG, L [1 ]
LEWIN, I [1 ]
WARSHAWSKY, A [1 ]
机构：
[1] WEIZMANN INST SCI,DEPT ORGAN CHEM,IL-76100 REHOVOT,ISRAEL
来源：
JOURNAL OF MEMBRANE SCIENCE | 1992年 / 70卷 / 01期
关键词：
MEMBRANE EXTRACTION; SUPPORTED LIQUID MEMBRANES; WASTE-WATER TREATMENT; CARRIER; DI(2-ETHYLHEXYL)DITHIOPHOSPHORIC ACID;
D O I：
10.1016/0376-7388(92)80077-W
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A membrane-based process for silver recovery from waste solutions was derived. Silver diffused from the feed solution through the supported liquid membrane containing di(2-ethylhexyl)dithiophosphoric acid (DTPA) as a carrier into the receiver solution, which contained thiourea at a low pH. Silver transfer rate and diffusion coefficient in the membrane were found to be up to 1.5 X 10(-9) mol/cm2-sec and 2 X 10(-6) cm2/sec, respectively. The membranes used demonstrated an ability to work in contact with waste solutions from silver reclamation eluants until silver had been transferred even against a very high concentration gradient. The dependencies of silver transfer rate on such factors as pH in the receiver and feed phases, DTPA and thiourea concentrations, were investigated.
引用
收藏
页码：31 / 39
页数：9
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