Transport of copper, nickel and zinc ions across ultrafiltration membrane based on modified polysulfone and cellulose acetate

Abstract

In this work, an attempt has been made to separate divalent copper, nickel and zinc ions from aqueous solutions by modified polymeric membranes. Membranes from polysulfone (PSf) and cellulose acetate (CA) were prepared in the absence and presence of the hydrophilic polymer, sulfonated poly ether ether ketone (SPEEK) and additive, polyethyleneglycol (PEG 600), in various compositions. Studies were carried out to find the rejection and permeate flux of Cu(II), Ni(II) and Zn(II) ions using polyethyleneimine (PEI) as the chelating ligand. On increasing concentrations of SPEEK and PEG in PSf and CA casting solution, the rejection of metal ions is decreasing while the permeate flux has an increasing trend. These effects are due to the increased pore formation in the PSf and CA membranes because of the hydrophilic polymer and additive. In general, it was found that CA/SPEEK/PEG blend membranes displayed higher permeate flux and lower rejection compared to PSf/SPEEK/PEG blend membranes at all additive concentrations. It has also been demonstrated that the extent of removal of metal ions depend on the affinity of metal ions to PEI to form macromolecular complexes and the thermodynamic stability of the formed complexes. 

Optical Sensing of Copper and Its Removal by Different Environmental Technologies

“…Polyvinyltetrazole‐co‐polyacrylonitrile derived membrane is found effective for the sorption of copper as well as an effective membrane . Similar to this, sulfated chitosan/polyvinyl alcohol membranes are found to be effective sorptive membrane for both nickel and copper removal; polyethersulfone nanocomposite membrane coupled with self‐produced polyaniline/magnetite nanoparticles was found effective for copper removal; and modified polysulfone and cellulose acetate based ultrafiltration membrane was found to be effective membrane for copper and nickel removal . Sorption capacity of the sulfated chitosan/polyvinyl alcohol membrane for copper is higher than that of nickel.…”

Influence of bentonite in polymer membranes for effective treatment of car wash effluent to protect the ecosystem

“…Moreover ozonation leads to the formation of undesirable toxic products such as aldehydes, ketones and carboxylic acids and require high investmental cost (Metcalf and Eddy, 2006). Lately, membrane technology has been considered as a promising technology in treatment of effluents from various industries such as paper (Saranya et al, 2014), textile (Srivastava et al, 2011), metal ion removal (Arthanareeswaran et al, 2007b;Arthanareeswaran and Thanikaivelan, 2012). The main advantage of membrane separation process is low cost, easy to scale up, low footprint and less energy consumption (Chelme-Ayala et al, 2009) though it suffers from limitations such as fouling and concentration polarization.…”