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Merck

The removal of heavy metal ions from aqueous solutions by novel pH-sensitive hydrogels.

Journal of hazardous materials (2010-08-17)
Ufuk Yildiz, Omer Ferkan Kemik, Baki Hazer
RESUMO

Novel non-ionic hydrogels were synthesized by radical homopolymerization of N-vinyl-2-pyrrolidone (VP) or by radical copolymerization of VP with methylacrylate (MA). A macroinimer (MIM) was used as a crosslinker and initiator, as well. The percentage of mass swelling ratios (S(M)), the molecular weight between crosslinks (M(c)) and Young's modulus of the hydrogels were investigated. The hydrogels were used as binding materials for different heavy metal ions such as Cu(2+), Cd(2+), Ni(2+) and Zn(2+) under varying conditions. The binding capability of the hydrogels toward the metal ions decreases in the following order: Cu(2+)>Ni(2+)>Zn(2+)>Cd(2+).

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Sigma-Aldrich
2-Pyrrolidinone, ≥99%
Sigma-Aldrich
Methyl acrylate, 99%, contains ≤100 ppm monomethyl ether hydroquinone as inhibitor
Sigma-Aldrich
2-Pyrrolidinone, 99%
Supelco
Methyl acrylate, analytical standard
Sigma-Aldrich
2-Pyrrolidinone, purum, ≥98.0% (GC)