Poly(Acrylonitril-co-Vinylimidazol) (p(AN-co-VI)) based hydrogels were prepared in bulk (macro) dimensions with different mole ratios by employing a redox polymerization technique and used in heavy metal removal such as As(V), Cr(II), and Cr(VI) form aqueous environments. The prepared hydrogels were quaternized (positively charged) for VI moieties, and amidoximated for AN moieties (conversion of hydrophobic nitrile groups in AN structure to hydrophilic amidoxime groups). The prepared p(AN-co-VI) hydrogels swelling behaviors in water and at different pH were investigated. And the functional groups and thermal behaviors were characterized using FT-IR and TG analysis. The adsorption of As(V), Cr(III) and Cr(VI) from aqueous solutions onto p(AN-co-VI) and amid-p(AN-co-VI) investigated. Various parameters affecting the absorption characteristic of these metal ions such as pH, initial metal ion concentration, contact times and the absorbent amounts were investigated. Three different of kinetic models (i.e., pseudo-first-order second-order equations and intraparticular diffusion model) were used to investigate the adsorption mechanisms.

Removal of As(V), Cr(III) and Cr(VI) from aqueous environment by modifiable hydrogels

245th National Meeting (2013)

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