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Preparation and adsorption characters of Cu(II)-imprinted chitosan/attapulgite polymer
Yingying Shi,Qianghua Zhang,Liangdong Feng,Qingping Xiong,Jing Chen 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.5
Using attapulgite (ATP) as matrix, chitosan (CS) as functional monomer, and introducing the surface ionimprintingconcept, a new Cu(II)-IIP was prepared, and characterized by SEM, XRD and FT-IR. The adsorption ofCu(II) aqueous solution with Cu(II)-IIP was investigated by flame atomic adsorption spectroscopy (FAAS). The polymerhas good selectivity for Cu(II) from competitive metal ions, and the selectivity coefficient of Cu(II) relation to Pb(II),Cd(II) was 78.45 and 82.44, respectively. Sorption equilibrium isotherms could be described by Langmuir and Freundlichmodels; the Freundlich isotherm has shown the best agreement with experimental data, and experimental value of maximumadsorption capacity for Cu(II) was 35.20 mg/g. The obtained thermodynamic parameter (ΔGo, ΔHo, ΔSo) showedthat the Cu(II) adsorption process is a spontaneous and endothermic process. The kinetic data showed that pseudosecond-order kinetic model agrees very well with the dynamic behavior for the sorption of Cu(II) onto Cu(II)-IIP.