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Characterization of sophorolipid biosurfactant produced by Cryptococcus sp. VITGBN2 and its application on Zn(II) removal from electroplating wastewater
Geetanjali Basak,
Published in
2014
Volume: 35
   
Issue: 6
Pages: 1087 - 1094
Abstract
The present study aimed at elucidating the role of biosurfactant produced by yeast for the removal of Zn(l I) ions from electroplating wastewater. The yeast species isolated from CETP, Vellore, Tamilnadu was identified as Cryptococcus sp.VITGBN2, based on molecular techniques and was found to be potent producer of biosurfactant in mineral salt media containing vegetable oil as additional carbon source. Chemical structure of the purified biosurfactantwas identified as acidic diacetate sophorolipid through CC- MS analysis. Interaction of Zn(ll) ions with biosurfactant was monitored using FT-IR, SEM and EDS analysis. Zn (II) removal at 100 mg 11 concentration was 84.8{\%} compared were other synthetic surfactants (Tween 80 and sodium dodecyl sulphate), yeast mediated biosurfactant showed enhanced Zn (II) removal in batch mode. The role of biosurfactant on Zn(ll) removal was evaluated in column mode packed with biosurfactant entrapped in sodium alginate beads. At a flow rate of 1 ml mm1 and bed height of 12 cm, immobilized biosurfactant showed 94.34 {\%} Zn(ll) removal from electroplating wastewater. The present study confirmed that Zn(ll) removal was biosurfactant mediated. This is the first report establishing the involvement of yeast mediated biosurfactant in Zn(ll) removal from wastewater.
About the journal
JournalJournal of Environmental Biology
ISSN23940379