US EPA

1786489 

Journal Article 

Equilibrium and Kinetic Studies on Biosorption of Cr (VI) using Novel Aspergillus Jegita isolated from Tannery Effluent 

Reya, I; Prabha, LM; Renitta, ER 

2013 

1 

Research Journal of Chemistry and Environment
ISSN: 0972-0626 

17 

4 

72-78 

WOS:000316687100012 

http://://WOS:000316687100012
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The present work is concerned to remove Cr (VI) using the biosorption potential of the novel fungal biomass Aspergillus jegita isolated from tannery effluent. The dry fungal biomass was used to optimize various parameters such as contact time, initial metal ion concentration, pH, biomass loading etc. The percentage removal of chromium using various chemical pre-treatments was carried out. Maximum of 90.86% Cr (VI) removal was observed in 25 mg/L initial Cr (VI) metal ion concentration using dry Aspergillus jegita biomass. Maximum of 92.8% Cr (VI) removal was observed in 25 mg/L initial Cr (VI) metal ion concentration using dry alkali treated A. jegita biomass at 37 degrees C, pH 2.0 and 150 rpm. Further equilibrium modeling was carried out using Langmuir and Freundlich adsorption isotherm and the data were fitted. The kinetics of hexavalent chromium biosorption has been evaluated with respect to first order and second order kinetic equations. The characterization studies were carried out using SEM. The Cr (VI) metal was found to desorb effectively using 0.1M HCl and removal efficiency was found to be 96.3 % and can be recycled.