The removal of heavy metal ions from aqueous solutions by novel pH-sensitive hydrogels.
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+).
Yildiz
Ufuk
U
University of Kocaeli, Department of Chemistry, 41380 Kocaeli, Turkey. uyildiz@kocaeli.edu.tr
Kemik
Omer Ferkan
OF
Hazer
Baki
B
D000179:Acrylates; D002104:Cadmium; D003300:Copper; D020100:Hydrogels / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D019216:Metals, Heavy / Q000302:isolation & purification*; D009532:Nickel; D011760:Pyrrolidinones; D012996:Solutions; D018508:Water Purification / Q000379:methods*; D015032:Zinc
D000179:Acrylates; D020100:Hydrogels; D019216:Metals, Heavy; D011760:Pyrrolidinones; D012996:Solutions; D002104:Cadmium; D003300:Copper; D009532:Nickel; D015032:Zinc; C028537:2-pyrrolidone; C035956:methyl acrylate