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Studies on the grafting of acrylic acid on starch

✍ Scribed by F.E. Okieimen; J.E. Nkumah; F. Egharevba

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
212 KB
Volume
25
Category
Article
ISSN
0014-3057

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✦ Synopsis

Graft copolymers of acrylic acid on starch were prepared b~ the use of ceric ion at various concentrations in aqueous media at 29vC. The attachment of the grafts to starch led to marked improvement in the water retention capacity and metal ion binding capacity of the polymeric substrate. The equilibrium sorption data for Cu(II) ions on starch graft copolymers fitted the Freundlich isotherm, with the coefficient and exponent of the isotherm being 0.40 and 0.60 respectively. The distribution coefficient for Cu(II) ions between the polymeric substrate and ~che bulk aqueous phase depended on the concentration of the metal ion in solution, indicating that Cu(II) ions may be strongly adsorbed on the starch graft copolymers.

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