학술논문
Structure of polyvinyl alcohol-g-acrylic acid-2-acrylamido-2-methyl- 1-propanesulfonic acid hydrogel and adsorption mechanism for advanced Pb(II) removal
Document Type
Article
Source
Journal of Industrial and Engineering Chemistry, 35(0), pp.309-317 Mar, 2016
Subject
Language
English
ISSN
1876-794X
1226-086X
1226-086X
Abstract
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 effectivenetwork density of the hydrogel increased with AMPS dosage, and more uniform and dense porousnetwork 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 ofmonolayer adsorption of Pb2+. The adsorption was rapid and spontaneous, favorable at hightemperature, and belonged to the second-order kinetic model, indicating chemical adsorption withion-exchange mechanism. Good reusability of the hydrogel was achieved.