Recherche sur les biopolymères

Abstrait

Synthesis of environmental friendly chelating biopolymers for the selective adsorption of metal ions to be used in effluent treatment

Mamta Ahuja and Anu Agarwal

Chemical modification of naturally occurring polysaccharide, guaran has been made by incorporating 5- amino salicylic hydroxamate moiety to improve its selectivity and capacity for heavy metal ions. 5- Amino salicylic acid hydroxamate derivative of guaran (ASAH-G) was synthesized, characterized and its adsorption behaviour with Fe(II), Co(II), Ni(II), Cu(II), Zn(II), Cd(II), U(VI), W(VI), Cr(VI) and Ca(II) metal
ions was studied at equilibrium in terms of molar distribution coefficient values (Kd). The metal adsorption ability of the resin was compared with the hydroxamate derivative of dialdehyde guaran (HADA-G). Separation of a mixture of Fe(II) and Co(II) was achieved using column chromatography.