Biosorption of Metal Ions by Exopolysaccharide Produced by Azotobacter chroococcum XU1

Bakhtiyor A. Rasulov, Abulimiti Yili, Haji A. Aisa

1Institute of Genetics and Plant Experimental Biology, Uzbekistan Academy of Sciences, Yukori Yuz, Uzbekistan; 2The Key Labora- tory of Plant Resources and Chemistry of Arid Zone, China Xinjiang Technical Institute of Physics & Chemistry, CAS, Urumqi, China.
1The Key Labora- tory of Plant Resources and Chemistry of Arid Zone, China Xinjiang Technical Institute of Physics & Chemistry, CAS, Urumqi, China; 2Central Asian Drug Discoveries and Development Center of Chinese Academy of Sciences, Urumqi, China..

DOI: 10.4236/jep.2013.49114                

Abstract

This paper deals with adsorption of Pb and Hg on the exopolysaccharide produced by Azotobacter chroococcum XU1. The adsorption of metal ions was significantly affected by the pH of metal solutions (Pb(NO₃)₂ and Hg(NO₃)₂), metal ions concentration and exopolysaccharide concentrations. At optimum pH the uptakes of the metals were 40.48% and 47.87% respectively. The metal ions biosorption was high at 4, 5-5.

Keywords

Azotobacter chroococcum XU1; Exopolysaccharide; Biosorption; Lead; Mercury

Conflicts of Interest

The authors declare no conflicts of interest.

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