Abstract
Sequent Adsorption of Phosphate Ions by Copper Ions Adsorbed on Tripolyphosphate Chitosan
Thai Anh Nguyen1,2, Huu Trung Bui3, Vu Bich Hanh Dang1,2
, Thi Bich Huyen Trinh1,2
, Thi Huynh Tram Le1,2 and Vinh Tien Nguyen3*
DOI : http://dx.doi.org/10.13005/ojc/390209
Abstract:
In this study, we successfully crosslinked chitosan using STPP and produced chitosan beads to adsorb copper ions and subsequently phosphate ions from aqueous solutions. The optimal concentrations of chitosan (2% w/v) and STPP (7.5% w/v) during chitosan beads preparation and the optimal pH of 5.0 during adsorption were determined. Several adsorption models, including pseudo-first-order, pseudo-second-order, Langmuir, and Freundlich models, were used to evaluate the static adsorption experimental data. Moreover, the chitosan beads were applied in a dynamic adsorption column and several models including Bohart-Adam, Thomas, Yoon-Nelson, and Clark models were used to describe the system. This study showed that after adsorbing heavy metal ions, chitosan-STPP beads can be used for further adsorption of toxic anions from wastewater.
Keywords:Adsorption; Chitosan; Copper; Phosphate; Sequent Adsorption; STPP
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