Static and dynamic adsorption of copper ions on chitosan/polyvinyl alcohol thin adsorptive membranes: Combined effect of polyethylene glycol and aminated multi-walled carbon nanotubes

Adsorption of Ca(II), Mg(II), Zn(II), and Cd(II) on Chitosan Membrane Blended with Rice Hull Ash Silica and Polyethylene Glycol

“…It has attracted great attention for preparation of affinity membranes due to high binding capacity, broad availability and excellent membraneforming property [6][7]. However, membranes formed of pure chitosan are fragile and brittle which limits their application.…”

“…Increasing the silica to chitosan ratio of the membrane leads to higher porosity and roughness, increased copper ion adsorption [2]. CPMP membrane containing combined MWCNT-NH 2 and PEG was used Salehi et al for Cu(II) removal from water [6]. CPMP membrane provided superior adsorption performance compared to the CPMP membrane without PEG.…”

“…Some studies focus on adsorptive membranes to remove heavy metal ions from aqueous solutions. Heavy metal ions can be removed when the ions are in contact with the surface of the membrane, even when the pore sizes of the membrane are much larger than the dimensions of the metal ions [1][2][3][4][5][6][7][8].…”

“…Porogens (pore generator) are employed to generate membrane pores. In preparation of adsorptive membranes, porogens play two roles: enhancement of internal sorption (pore) capacity and dispersivity improvement [6][7]9]. Generally, the porogens for chitosan based membranes are polyethylene glycol, polyvinyl pyrrolidine (PVP), silica and salts (e.g.…”

“…NaCl) [10][11][12][13][14][15][16]. Blending chitosan with compatible polymers such polyethylene glycol and silica results in spongy membranes also resulted in highly effective metal-affinity membranes [6,[14][15][16].…”