THE INFLUENCE OF MEMBRANE PREPARATION PARAMETERS ON CHITOSAN MEMBRANEMORPHOLOGY

فاقد چكيده

Chitosan is a linear polysaccharide which has been reported to be a suitable biopolymer for the removal of metal ions from wastewater. As the presence of such metals in the nature causes harmful effects, the separation of trace quantities of heavy metal ions is a great concern for achieving environmental standards. Chitosan membrane can separate such ions in low quantities with chelation mechanism. Polymer concentration and accessible amino groups play an important role in the separation. For this, the membrane morphology is really an effective parameter on separation amount. In this paper, the effect of impressive factors (polymer, solvent and nonsolvent concentration) on membrane morphology and copper ions separation amount is studied. By decreasing polymer concentration, increasing solvent and nonsolvent concentration, the membrane becomes more porous, and due to the kind of process which is batch, the polymer amount on the opposite side of the surface decreases and hence the separation is decreased.