Abstract
The present study comprises a new method for enhancing biosorption capacity of isolated cyanobacterial strain to remediate metals (Cr, Pb, Ni, Zn and Cu) from different industrial effluent including dairy, sugar mill, pharma and steel plant by the means of controlled minimum electric current. Random Amplified Polymorphic DNA analysis was performed for determination of genomic variation produced within the cyanobacterial cells due to electricity. Initial metal concentrations were found maximum in steel plant effluent followed by pharma, sugar and dairy effluent. Maximum concentration of metals was recorded in an order of Zn > Cu > Cr > Pb > Ni in dairy and steel plant effluents. While the sugar mill effluent contains metals in Cr > Cu > Zn > Pb > Ni order and in pharma effluent it was found as Cu > Cr > Zn > Pb > Ni. For determination of biotechnological importance and significant role of wild and electricity treated improved strain of A. variabilis GITAM RGP, biosorption experiments were carried out in batch conditions. The electric current treated improved strain was found to be more efficient over wild strain as it was shown maximum removal of copper (87.50%), chromium (82.96%), lead (86.44%), zinc (86.59%) from the sugar mill effluent and nickel (82.76%) which was removed maximum from pharma city effluent.