Polyethyleneimine integrated sodium alginate hydrogel for effective uptake of toxic metallic ions and catalysis in effluents
발표자
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초록
내용
In this study, we represent, a biobased sodium alginate (SA) hydrogel functionalized by polyethyleneimine (PEI) for the effective and practical uptake of copper (Cu2+) and lead (Pb2+) ions in sewages. Thanks to the immense active sites, the SA/PEI hydrogel demonstrated excellent uptake of Cu2+ and Pb2+ ions in a mono-ion adsorption system with the adsorption kinetics and isotherm well-abide with the pseudo-second-order and Langmuir models, respectively. Based on the X-ray photoelectron spectroscopic analysis, the metal ion binding process found to be followed by the chelation within the metal ions and chemical moieties of the SA/PEI hydrogel. In addition, the Cu2+ ions adsorbed on the hydrogel network, were insitu reduced, forming a Cu nanoparticles-templated SA/PEI hydrogel which verified superior catalytic property in the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol.