Biosorption of Cr(VI) from Aqueous Solution by Aspergillus Niger

Abstract:

Article Preview

In this study, Biosorption of hexavalent chromium ions from aqueous solution by using biomass of Aspergillus niger was investigated. Different parameters such as initial pH, biosorbent amount, contact time and temperature were explored. The biosorption of Cr (VI) ions was highly pH dependent and the optimum pH for biosorption of Cr (VI) ions was found to be 2.0. Biosorption capacity of Cr (VI) ions decreased with increased biosorbent dosage. The biosorption equilibrium was established in about 120min of contact time. Equilibrium uptake of Cr (VI) ions onto biomass increased from 12.57 mg/g at 20°C to 19.48 mg/g at 40 °C for 20mg/L Cr (VI) ions concentration. The biosorption process followed the pseudo-second order kinetic model and the correlation coefficients from the pseudo-second order model were all higher than 0.997 in all studied temperatures. These results suggest that the biomass of Aspergillus niger is a promising biosorbent for removal of chromium (VI) ions from the wastewater.

Info:

Periodical:

Advanced Materials Research (Volumes 236-238)

Edited by:

Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao

Pages:

155-158

DOI:

10.4028/www.scientific.net/AMR.236-238.155

Citation:

L. F. Zhang et al., "Biosorption of Cr(VI) from Aqueous Solution by Aspergillus Niger", Advanced Materials Research, Vols. 236-238, pp. 155-158, 2011

Online since:

May 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.