Investigation of Organic Matter Release in Emulsion Liquid Membrane Treatments

Authors : Levent GÜREL

Pages : 265-271

Doi:10.3906/tar-1101-1671

View : 13 | Download : 10

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The emulsion liquid membrane insert ignore into journalissuearticles values(ELM); technique is a process used for separation. It uses organic diluents, extractants, and surfactants. Due to the organic nature of these constituents, an unwanted organic matter release to the external phase occurs during the separation process. The present study demonstrates this organic matter release to the external phase in the ELM process used for the removal of lead ions from industrial storage battery wastewater. Toluene, kerosene, mineral oil, and xylene, as organic diluents, sorbitan monooleate insert ignore into journalissuearticles values(Span 80); and polyoxyethylene insert ignore into journalissuearticles values(20); sorbitan trioleate insert ignore into journalissuearticles values(Tween 85);, as surfactants, and di-2-ethylhexyl phosphoric acid insert ignore into journalissuearticles values(D2EHPA);, as extractant, were used. In the process of lead ion removal from storage battery wastewater, while lead ion concentration decreased to < 0.4 mg/l from its initial value of 2.8 mg/l, the organic matter load insert ignore into journalissuearticles values(COD); of the treated wastewater increased to about 160 mg/l. Additionally, Span 80 exhibited better results than Tween 85 in terms of CODs and lead removal. Kerosene had a more stable membrane than the other organic diluents used. The optimum membrane components and their rates were 70% kerosene, 18% mineral oil, 3% Span 80, and 9% D2EHPA. When wastewater pH was adjusted to improve lead ion removal, COD of the treated wastewater increased to > 200 mg/l.
Keywords : Emulsion liquid membrane, Industrial storage battery wastewater, Lead ion, Organic matter release