Performance evaluation of isolated electrogenic microalga coupled with graphene oxide for decolorization of textile dye wastewater and subsequent lipid production

[Display omitted] •Graphene oxide and microalgae bionanocomposite was synthesized.•Enhanced dye degradation and lipid generation was achieved by bionanocomposite.•GO/algae bionanocomposite was rich in C16 and C18 fatty acids. Microalgae are photosynthetically competent organisms that utilize solar e...

Full description

Saved in:
Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2019-11, Vol.375, p.121950, Article 121950
Main Authors: Behl, Kannikka, Joshi, Monika, Sharma, Mahima, Tandon, Simran, Chaurasia, Akhilesh K., Bhatnagar, Amit, Nigam, Subhasha
Format: Article
Language:English
Subjects:
Bionanocomposite
Desmodesmus sp
Extracellular electron transfer
Graphene oxide
Lipid profile
Textile azo dye
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:[Display omitted] •Graphene oxide and microalgae bionanocomposite was synthesized.•Enhanced dye degradation and lipid generation was achieved by bionanocomposite.•GO/algae bionanocomposite was rich in C16 and C18 fatty acids. Microalgae are photosynthetically competent organisms that utilize solar energy to perform several metabolic activities. In this study, electrogenic microalga Desmodesmus sp. was isolated from discharge site of textile dyeing mill effluent and was explored for its potential for dye degradation and lipid production. Extracellular electron transfer (EET) by microbes displays their capability to associate with its surrounding environment. To attain an efficient alternative, a nanobiotechnological approach was applied, wherein; extracellular electrons of Desmodesmus sp. was coupled with graphene oxide (GO) nanosheets on its electron-rich draper region to form a GO/algae bionanocomposite. Electrochemical tests of the bionanocomposite revealed that amalgamation of GO sheets with Desmodesmus sp. enhanced its electron availability (redox potential) without affecting its viability, demonstrating a sustainable and efficient reduction of azo dye along with enhanced lipid production to be used for biodiesel generation. The current bionanocomposite, thus, offers an eco-friendly, reusable, economical and sustainable solution towards water remediation and subsequent biofuel production.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2019.121950