Removal of metal ions from electroplating effluent by EDI process and recycle of purified water

Biosorption of nickel and copper onto treated alga (Undaria pinnatifida): Application of isotherm and kinetic models

“…Treatment processes for metals contaminated include chemical precipitation, membrane filtration, ion exchange, carbon adsorption and coprecipitation/adsorption [3][4][5][6][7]; nevertheless, it * Corresponding author. is not very available for these methods that high capital investment for membrane filtration, expensive running cost for ion exchange, active carbon adsorption and rewaste for chemical precipitation and coprecipiation/adsorption.…”

Ion and ionic current sinks for electrodeionization of simulated cadmium plating rinse waters

“…Furthermore, these processes cannot avoid the precipitation of bivalent metal hydroxide occurring at the resins interface and the anion exchange membranes [9][10][11]. Improvements with new configuration of the electrodeionization membrane stack to overcome the undesirable hydroxide precipitation have been reported by Feng et al [8]. Ion exchange membranes are troublesome and expensive.…”

“…Several treatment processes have been suggested for the removal of cadmium from aqueous waste streams, such as adsorption on activated charcoal [1], biosorption on marine algae [2], ion exchange [3], cathodic reduction [4,5], chemical precipitation [6], electrodialysis [7], and electrodeionization [8][9][10][11].…”

“…Continuous processes such as electrodialysis [7] and filled cell electrodialysis or otherwise called continuous electrodeionization [8][9][10][11], comprise alternating permselective cation exchange membranes and anion exchange membranes. These membranes under the influence of the electric field allow only cations or only anions, respectively, to permeate their mass and simultaneously retain cations so that diluate and concentrate compartments are created and deionization occurs.…”

San copolymer membranes with ion exchangers for Cu(II) removal from synthetic wastewater by electrodialysis

“…This method has already been applied for the removal of Cu 2+ , Ni 2+ and Cr 6+ ions from the dilute solutions (Dzyazko, 2006;Dzyazko et al, 2008;Spoor et al, 2002;Mahmoud et al, 2007;Feng et al, 2007). But in these cases the process is complicated by the deposition of insoluble compounds on the ion exchange membrane.…”