期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 35, 期 -, 页码 309-317出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2016.01.010
关键词
(PVA-g-AA-AMPS) hydrogel; Pb2+ adsorption mechanism; Network structure
Polyvinyl alcohol-g-acrylic acid-2-acrylamido-2-methyl-1-propanesulfonic acid hydrogel (PVA-g-AA-AMPS) with varying AMPS/AA molar ratio was synthesized. The shear storage modulus and effective network density of the hydrogel increased with AMPS dosage, and more uniform and dense porous network structure formed. Pb2+ adsorption capacity of the hydrogel increased with AMPS/AA molar ratio, while Langmuir isotherm fitted well with the experimental data, indicating homogeneous nature of monolayer adsorption of Pb2+. The adsorption was rapid and spontaneous, favorable at high temperature, and belonged to the second-order kinetic model, indicating chemical adsorption with ion-exchange mechanism. Good reusability of the hydrogel was achieved. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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