IJBLST 2016 Volume 8 Issue 1
International Journal of Biological Sciences and Technology (IJBLST) ISSN: 0975–8704
An Open Access Journal -- NO Fees -- NO Processing Charges -- 100% Non Profit Initiatives
A Study on Biological Removal of Cr(VI) by Growing Aspergillus sp. isolated from Industrial Wastewaters. Mousumi Sen. IJBLST (2016), 8(1):1-10
A Study on Biological Removal of Cr(VI) by Growing Aspergillus sp. isolated from Industrial Wastewaters
Authors & Affiliation:
Department of Applied Chemistry, Amity School of Engineering & Technology, Bijwasan, New Delhi-110061, India
The present study was undertaken in batch bioreactor with an aim to examine the Cr(VI) removal potential of the growing filamentous fungal biomass of Aspergillus sp. isolated from industrial wastewaters. The effects of pH, initial Cr(VI) concentration, inoculum concentration and presence of other heavy metals (zinc and nickel) on specific Cr(VI) removal (mg g -1) were studied. The optimum pH value was found to be 5.0 for both growth and Cr(VI) removal. The maximum specific Cr(VI) removal (41.2 mg g -1) was achieved at 500 mg l -1 initial Cr(VI) concentration and at pH 5.0. The effect of inoculum 5-20 % (v/v) on specific Cr(VI) removal was also studied and a maximum 13.34 mg g -1removal was obtained using 20 % (v/v) inoculum at 100 mg l -1 initial Cr(VI) concentration. At the same Cr(VI) concentration (500 mg l -1), thespecificCr(VI) removal decreasedwith increase in zinc and nickel concentration upto 100 mg l -1. The organism was alsofound to remove 30.5 mg g -1 Cr(VI) from an effluent generated from an electroplating industry.
Keywords :Aspergillus sp., Batch Biosorption, Cr (VI), Growing cells, Effluent.