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Application of a Liquid Membrane to Recover Cadmium
Author(s) -
Bansal B.,
Mahajan R.,
Hossain Md M.,
Liaw M. S.
Publication year - 2006
Publication title -
developments in chemical engineering and mineral processing
Language(s) - English
Resource type - Journals
eISSN - 1932-2143
pISSN - 0969-1855
DOI - 10.1002/apj.5500140120
Subject(s) - cadmium , membrane , stripping (fiber) , extraction (chemistry) , chemistry , aqueous solution , solvent , ammonium acetate , wastewater , chromatography , membrane technology , ionic liquid , ammonium , chemical engineering , materials science , waste management , organic chemistry , catalysis , engineering , high performance liquid chromatography , biochemistry , composite material
Recoveiy of toxic metals from industrial wastewaters is an important environmental issue. The use of liquid membrane technology has gained momentum in recent years as it allows the reuse of water and toxic metals. In this study, a bulk liquid membrane consisting of D2EHPA (ionic extractant) in n‐hexane (solvent) was used to extract cadmium from an aqueous solution simulating industrial wastewater, and ammonium acetate solution was used to strip cadmium from the membrane phase. Initially, equilibrium and kinetics experiments were performed to identrfL favourable operating conditions as well as extraction and stripping rates. Then bulk liquid membrane experiments, with simultaneous extraction and stripping, were performed. More than 90% of the cadmium was recovered using the bulk liquid membrane in 120 minutes.