The present communication makes use of purified
biopolymeric materials like sawdust and groundnut shells
for adsorption of heavy metal ions namely, Cu(II), Ni(II) and
Zn(II) from their aqueous solutions. These materials possess
both cellulose and lignin as major components, which have
been shown to adsorb metal ions from their aqueous solutions.
Further, these materials were loaded with a reactive
dye, C.I. Reactive Orange 13, of specific structural features
in order to enhance the metal ion uptake [18]. The specific
reactive dye possesses a monochlorotriazine group, which
forms a strong covalent linkage with the primary hydroxyl
group of the cellulose and a chromophoric group, which has
azo and hydroxyl group in favourable position so as to form
a stable six membered ring chelate. The effect of pH of the
metal ion solutions on their adsorption, the regenerative capacity
and reusability of the adsorbing materials were also
assessed in the present study
The present communication makes use of purified
biopolymeric materials like sawdust and groundnut shells
for adsorption of heavy metal ions namely, Cu(II), Ni(II) and
Zn(II) from their aqueous solutions. These materials possess
both cellulose and lignin as major components, which have
been shown to adsorb metal ions from their aqueous solutions.
Further, these materials were loaded with a reactive
dye, C.I. Reactive Orange 13, of specific structural features
in order to enhance the metal ion uptake [18]. The specific
reactive dye possesses a monochlorotriazine group, which
forms a strong covalent linkage with the primary hydroxyl
group of the cellulose and a chromophoric group, which has
azo and hydroxyl group in favourable position so as to form
a stable six membered ring chelate. The effect of pH of the
metal ion solutions on their adsorption, the regenerative capacity
and reusability of the adsorbing materials were also
assessed in the present study
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