Metal anion removal Cr (Vi)‎ from wastewater using chitosan extracted from fish shells

الملخص EN

In this research work natural bio polymer ''chitosan'' was synthesized using fish shells and adsorption of chromium by chitosan was studied.

Synthesize of chitosan involved four main stages as preconditioning, demineralization, deproteinization, decolorization and deacetylation.

Chitosan was characterized using Fourier Transform Infrared Spectroscopy (FTIR) and solubility in 1 % acetic acid.

The affinity of chitosan for chromium was studied using K2Cr2O7 solution as the heavy metal solution containing Cr (VI) ions.

The ability of chitosan as an adsorbent for Cr (VI) ions in aqueous solution was studied.

The capacity of chitosan to trap chromium ions in aqueous solution was carried out at 30oC using concentration as parameters.

Our results show that the adsorption process is concentration-driven with high capacity of chitosan for the adsorption of these metal ions.

The Infra red spectroscopic study on the chitosan and the metal-chitosan complexes reveal a metal coordination based on the observed characteristic band changes.

At initial chromium concentrations of 1, 3, 5 and 8 mg / L, the adsorbed chromium ion concentrations are 0.74, 2.36, 4.34, and 7.38 mg / L, respectively.