Recovery of Copper Ions from Wastewater by Hollow Fiber Supported Emulsion Liquid Membrane

• Published in: Chinese journal of chemical engineering Vol. 21; no. 8; pp. 827 - 834
• Main Author: 郑辉东 陈晶晶 王碧玉 赵素英
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2013
• Subjects: copper ion; Emulsions; Extraction; extraction rate; Fibers; Flow rate; hollow fiber; Liquid phases; LIX984N; Stripping; supported emulsion liquid membrane; Surfactants; Waste water; 中空纤维; 乳状液膜; 废水回收; 硫酸溶液; 表面活性剂; 载流子浓度; 铜离子; copper ion; hollow fiber; supported emulsion liquid membrane; extraction rate
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(13)60547-9

Recovery of copper ions from wastewater using a hollow fiber supported emulsion liquid membrane （HFSELM） was studied with LIX984N as carrier, kerosene as diluents, and sulfuric acid solution as stripping phase. Effects of compositions of feed and emulsion liquid phase, flow rates on both sides of membrane, and hollow fiber module parameters were investigated. The stability of the emulsion liquid phase without surfactant and the effect of buffer in the feed phase on the extraction rate were also evaluated. It is found that the stability of the emulsion phase without surfactant is poor. Higher flow velocity gives shorter residence time for the emulsion liquid phase on the tube side, reducing the effect of particle coalescence on the separation process. The extraction rate increases with the increase of feed phase pH, carrier concentration, hydrogen ion concentration in the stripping phase, and ef- fective hollow fiber area. The phase ratio in the emulsion liquid phase has a negative effect on extraction rate. The flow rates on both sides have little influence on the extraction performance of the HFSELM, while buffer addition in the feed solution improves the extraction efficiency.