EMULSION LIQUID MEMBRANES FOR WASTE-WATER TREATMENT - EQUILIBRIUM-MODELS FOR LEAD-DI-2-ETHYLHEXYL AND CADMIUM-DI-2-ETHYLHEXYL PHOSPHORIC-ACID SYSTEMS

被引：37

作者：

RAGHURAMAN, BJ ^{[1
]}

TIRMIZI, NP ^{[1
]}

KIM, BS ^{[1
]}

WIENCEK, JM ^{[1
]}

机构：

[1] RUTGERS STATE UNIV,DEPT CHEM & BIOCHEM ENGN,PISCATAWAY,NJ 08855

来源：

ENVIRONMENTAL SCIENCE & TECHNOLOGY | 1995年 / 29卷 / 04期

关键词：

D O I：

10.1021/es00004a018

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Extraction and recovery of heavy metals from wastewater is more attractive than methods such as precipitation which result in sludges that have to be disposed in landfills. Emulsion liquid membranes are capable of extracting metals from dilute waste streams to levels much below those possible by equilibrium-limited solvent extraction. Binary equilibrium data are reported for lead and cadmium with extractants that can be used in emulsion liquid membrane formulations. Predictive models that incorporate aqueous phase nonidealities and all aqueous phase ionic reactions have been developed. Equilibrium constant values have been reported for Pb- and Cd-di-2-ethylhexyl phosphoric acid systems. Emulsion liquid membrane extractions of Pb and Cd from aqueous phases are successfully demonstrated.

引用

页码：979 / 984

页数：6

共 18 条

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