Treatment of nickel containing industrial effluents with a hybrid process comprising of polymer complexation–ultrafiltration–electrolysis

Application of the hybrid complexation–ultrafiltration process for metal ion removal from aqueous solutions

“…The aim of the choice of macromolecular weight of the PAASS was for reducing the loss of polymer during this pre-filtration. In fact, after the pre-treatment, the loss of polymer was only 2%, and much lower than that reported by Baticle et al [2] (maximum to 25%). The pre-treated polymer was used for all complexation-ultrafiltration experiments with UEOS-503 membrane.…”

“…In order to treat better these streams, one of the most promising methods is the complexation-ultrafiltration process by the addition of watersoluble polymers in the wastewaters [1][2][3]. This process is based on the principles that the polymers with a larger molecular weight than molecular weight cut-off (MWCO) of ultrafiltration membranes, such as polyethyleneimine [4,5], poly(acrylic acid) [1] and poly(vinyl alcohol) [6] etc.…”

“…The complexation-ultrafiltration process has been applied to treat various wastewaters [2,3,9,10], ground and underground waters [11,12], as well as the removal of radionuclides [13]. Trivunac and Stevanovic [14] tried to remove cadmium and zinc ions by using diethylaminoethyl cellulose as a complexing agent.…”

Experimental studies on extraction of cobalt ions from dilute aqueous solutions by using complexation-ultrafiltration process

“…Furthermore, the bound metal ions must be released from the polyelectrolyte so that there is a possibility for recovering the metals and reusing the polymer. Some research efforts have been carried out to investigate the applicability of CUFP in metal extraction from aqueous solutions [14,15]. Molinari et al [16] used the polyethyleneimine as a complexing agent to study the CUFP in the selective separation of Cu 2+ and Ni 2+ in aqueous media.…”

Recovery and reuse of surfactant SDS from a MEUF retentate containing Cd2+ or Zn2+ by ultrafiltration

“…It is different from conventional ultrafiltration. When the simulated retentate solution had been pretreated and then passed through the membrane, a great deal of free heavy metal ions were forced into permeate solution, which could be recovered with electrolytic process [23] or foam fractionation [24], while the pure SDS micelles retained in retentate to be reclaimed. Two pretreatment methods were tested for separation of Cd 2+ or Zn 2+ from SDS micelles: (1) chelation followed by ultrafiltration; (2) acidification followed by ultrafiltration.…”