Water recycling from mixed chromic acid waste effluents by membrane technology

Separation of Cd and Ni from multicomponent aqueous solutions by nanofiltration and characterization of membrane using IT model

“…The value of P M is highly dependent on the type of anion of the electrolyte solute. Strongly solvated anions (SO 4 2− ) lead to lower values of P M in comparison with the less solvated anions (Cl − ). Similar trends are reported in literature for different monovalent and divalent salts by several researchers [20,21,25,31,32].…”

“…Heavy metals are harmful to the environment because of their higher toxicity, non-biodegradable and persistent nature [1]. The pollution sources of these metals in water are industrial activities, such as electroplating, mining, battery manufacturing, metal finishing, textile industries, and automotive industries [2][3][4]. Different treatment techniques, such as coagulation-flocculation, chemical precipitation, ion exchange and floatation have been tried to treat these wastewaters [5][6][7][8][9].…”

Effect of solvents on performance of polyethersulfone ultrafiltration membranes: Investigation of metal ion separations

“…From these waste streams heavy metals such as Cr(VI), Cr (III), Cu(II), Zn(II), etc., could be separated and concentrated through binding of the target metal ions to water soluble polyelectrolyte and subsequent ultrafiltration of the bound metals from the unbound components [10,11]. Below we investigate the removal of metal ions from aqueous solutions by complexation-ultrafiltration and PES UF membranes are used for this purpose.…”

Metal ion separation and protein removal from aqueous solutions using modified cellulose acetate membranes: Role of polymeric additives

“…From these waste streams heavy metals such as Cr(VI), Cu(II), Zn(II), etc., could be separated and concentrated through binding of the target metal ions to water soluble polyelectrolyte and subsequent ultrafiltration of the bound metals from the unbound components [10,11]. In a previous investigation, 99.8% rejection of chromate from water has been achieved by polyelectrolyte enhanced ultrafiltration [12].…”