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Reference type: Journal
Authors: He J, Lu YC, Luo GS
Article Title: Ca(II) imprinted chitosan microspheres: An effective and green adsorbent for the removal of Cu(II), Cd(II) and Pb(II) from aqueous solutions.
Publication date: 2014
Journal: Chemical Engineering Journal
Volume: 244
Page numbers: 202-208.
DOI: 10.1016/j.cej.2014.01.096
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1385894714001211

Abstract: Ca(II)-CS microspheres with uniform size and morphology were first synthesized as a green and effective absorbent for the treatment of hazardous wastewater containing heavy metal ions. The adsorption capacities for Pb(II), Cd(II) and Cu(II) reached 47.1 mg, 49.9 mg and 41.5 mg per gram of Ca(II)-CS microsphere within 30 min, respectively. The pseudo-first-order equation and Langmuir isotherm model are fit to describe the adsorption kinetics and equilibrium separately. The orders of Δ G, Δ H and Δ S for three metal ions adsorption were in accordance with the theoretical analysis. TGA, FTIR and XPS measurements verified that Ca(II) ions played a role in tuning crosslinking degree by a weak complexation of NH2-Ca(II), and only amino groups were well-recognized as active sites for metal ions adsorption. An insight can be gained into the use of Ca(II)-CS microspheres for various heavy metal ions treatment in packed column
Template and target information: calcium ion, Ca(II), lead ion, Pb(II), cadmium ion, Cd(II), copper ion, Cu(II)
Author keywords: Ca(II) imprinted chitosan, Heavy metals, adsorption, microsphere


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