We prepared chitosan bead to remove some contaminants in water and wastewater treatment and determined the effect of chemically and physically modifying chitosan beads (CBs) on the simultaneous removal of a cation and anion. Hydrogel chitosan bead (HCB) were first prepared and then modified by crosslinking and air drying. Both the Cu(II) and phosphate removal were investigated based on the batch removal efficiency, a pH test, kinetics, and an isotherm test. The highest Cu(II) uptake (approximately 83%) was obtained for the HCB; crosslinking by glutaraldehyde (GA) and air drying decreased this to approximately 60%, while phosphate removal was not affected by crosslinking and drying. Below pH 4.0, the removal efficiency of Cu(II) was decreased by approximately 20% for all type of CB, while phosphate uptake was determined by the type of CB, regardless of the initial pH. The maximum Cu(II) and phosphate uptake (<i>Q</i>) were 129 and 232 mg/g for the HCB and dried chitosan bead (DCB), respectively. The phosphate sorption rate was faster than Cu(II) at the beginning of the reaction for the hydrogel bead, and while the dried bead reached the equilibrium in 72 h. This study will fill a major research gap and expand the use of chitosan in water and wastewater treatment.

Effect of physical and chemical modification for cation and anion removal by natural organic polymer

2019 Spring National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.