Bioaccumulation of heavy metals from aqueous solution using indigenous fungal isolates

Bioaccumulation of heavy metals from aqueous solution using indigenous fungal isolates

Abstract

Twenty six fungal strains were isolated from heavy metals contaminated soil of which A. flavus (F4) & R. pusillus (F6) were the most dominant. The growth of isolates were noticed by Pb, Cr & Cd concentration in the growth medium in one- step & two- step process, thus about seven isolates can grow upto 10mg (Pb,Cr, Cd)/100ml medium. The formulation of Sabourad dextrose broth (SDB) medium fortified the isolates by ingredients favored the best growth yields that have the highest biosorption, compared to Chashi medium (CM) and Yeast peptone glucose (YPG) medium. Thus, 99% of Pb & Cr were absorbed in biosorption medium containing 10mg Pb & Cr in 100ml medium while 77% of Cd was absorbed in the biosorption medium containing 10mg Cd in 100ml medium. Uptake capacity of resistant fungal isolates against heavy metals were checked in different medium. With respect to Pb, Cd and Cr maximum uptake of 39.58, 68.02 & 68.87mg.g-1 was observed by fungi Rhizomucor pusillus (F6) & Aspergillus flavus (F4). This indicated the potential of these identified fungi as biosorbent for removal of high concentration metals from soil and industrial effluents and also it was observed that efficiency of two-step process is better than the one-step process.

No. of Pages
499-507
Volume
45
Author's Details
Sadia et al 2016
Research Field
Microbiology