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Adsorption capacity, kinetics, and mechanism of copper(II) uptake on gelatin‐based hydrogels
Author(s) -
Kumari Manju,
Chauhan Ghanshyam S.
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32632
Subject(s) - self healing hydrogels , ammonium persulfate , gelatin , kinetics , polymer chemistry , adsorption , langmuir adsorption model , monomer , acrylamide , swelling , polyacrylamide , fourier transform infrared spectroscopy , materials science , nuclear chemistry , chemical engineering , polyelectrolyte , swelling capacity , methacrylate , chemistry , polymer , organic chemistry , composite material , physics , quantum mechanics , engineering
Gelatin‐based hydrogels were synthesized and characterized for use as Cu 2+ ‐ion sorbents. Gelatin was crosslinked in the presence of two different monomers, that is, acrylamide (AAm) and/or 2‐hydroxypropyl methacrylate, with N,N ‐methylenebisacrylamide, ammonium persulfate, and sodium bicarbonate. The as‐prepared hydrogels were further characterized by scanning electron microscopy, Fourier transform spectroscopy, and the study of their swelling behavior as a function of temperature, time, and pH to evaluate their structure–property relationships. The hydrogels were observed to be good sorbents of Cu 2+ , and a maximum uptake of 84.8% was observed within 2 h at 37°C and with 10 ppm of the Cu 2+ ‐ion solution for the gelatin and polyacrylamide hydrogel, which also exhibited the maximum retention capacity at 14.9 mg/g after four feeds. All of the experimental data exhibited good matches with the Langmuir isotherm and followed pseudo‐second‐order kinetics. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011