application ofdonnandialysis forcyanide removal fromaqueous solutions

cyanide ion, is an environmentally significant pollutant in many industrial wastewaters.therefore, a considerable number of methods have been studied for the wastewater treatment containingcyanide. the goal of our work consists in applying a simple and economic process for solving this problem ofpollution. the removal of cyanide ions by using three anion exchange membranes has been studied underdonnan dialysis conditions as a function of initial concentration of cyanide, receiver phase composition andco-existence anions in the feed phase. the feasibility of the system was examined and the highest cyanideremoval was obtained when the initial concentration of cyanide on the feed phase was 10-2 m. in addition, theaccompanying counter-anions were also influenced in the cyanide transport in the order chloride >hydrogenocarbonate > sulphate. it was also observed that the cyanide transport efficiency of the neoseptaafn was higher than that of the neosepta am3 and ionac ma3475xl membranes. the better result forafn membrane was obtained with chloride ion as a counter-anion in the receiver phase.