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Rapid removal of Cr(VI) ions from aqueous solutions by the macroporous poly( N, N ′‐dimethylamino ethyl methacrylate) hydrogels
Author(s) -
Zhu Weixia,
Song Hang,
Du Kaifeng,
Zeng Hao,
Yao Shun
Publication year - 2012
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.38409
Subject(s) - methacrylate , self healing hydrogels , adsorption , aqueous solution , materials science , monomer , polymer chemistry , copolymer , chemical engineering , nuclear chemistry , scanning electron microscope , chemistry , polymer , organic chemistry , composite material , engineering
To improve the adsorption ability of hexavalent chromium [Cr(VI)], the macroporous poly( N, N ′‐dimethylamino ethyl methacrylate) [poly(DMAEMA)] hydrogels were successfully fabricated by free‐radical copolymerization in ethanol/water mixture using N, N ′‐dimethylamino ethyl methacrylate (DMAEMA) as the monomer, N, N ′‐methylenebisacrylamide (MBAA) as the cross‐linker, and Na 2 SO 4 solution as the porogen. The effects of various parameters, such as the concentration of Na 2 SO 4 solutions, the dosage of MBAA, pH values, adsorption kinetic, and isotherm curves, were all investigated through systematic experiments. Scanning electron microscope (SEM) was employed to characterize the various pore structures. The experimental results showed that the influence of Na 2 SO 4 solution to the pore morphology in the matrix was significant. The poly(DMAEMA) hydrogels can effectively adsorb Cr(VI) ions in aqueous media, and the macroporous structures could obvious improve the response rate and adsorption capacity. These results prove that the macroporous poly(DMAEMA) gels can be treated as a potential material for environmental pollution control. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013