JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status
 

Search the Journal web-site through Google:


        Abstract - Issue Nov 2014, 35 (6)                                                                                                             Back



nstantaneous and historical temperature effects on a-pinene

Characterization of sophorolipid biosurfactant produced by Cryptococcus sp. VITGBN2 and its application on Zn(II) removal from electroplating wastewater

 

 

Geetanjali Basak and Nilanjana Das*

Environmental Biotechnology Division, School of Biosciences and Technology VIT University, Vellore-632 014, India

*Corresponding Author E-mail: nilanjana00@lycos.com 

  

  

Publication Data

Paper received:

19 July 2013

 

Revised received:

20 October 2013

 

Re-revised received:

25 December 2013

 

Accepted:

11 March 2014

 

Abstract

The present study aimed at elucidating the role of biosurfactant produced by yeast for the removal of Zn(II) 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 biosurfactant was identified as acidic diacetate sophorolipid through GC-MS analysis. Interaction of Zn(II) ions with biosurfactant was monitored using FT-IR, SEM and EDS analysis. Zn (II) removal at 100 mg l-1 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(II) removal was evaluated in column mode packed with biosurfactant entrapped in sodium alginate beads. At a flow rate of 1 ml min-1 and bed height of 12 cm, immobilized biosurfactant showed 94.34 % Zn(II) removal from electroplating wastewater. The present study confirmed that Zn(II) removal was biosurfactant mediated. This is the first report establishing the involvement of yeast mediated biosurfactant in Zn(II)? removal from wastewater.

 

Key words

Cryptococcus sp. VITGBN2, Sophorolipid, Zn (II) removal 

 

Copyright ? 2014 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).