Uranium adsorption and oil emulsification by extracellular polysaccharide (EPS) of a halophilic unicellular marine cyanobacterium Synechococcus elongatus BDU130911

Vijayaragavan Rashmi; Arulraj Darshana; Thangaraj Bhuvaneshwari; Sushanta Kumar Saha; Lakshmanan Uma; Dharmar Prabaharan

Current Research in Green and Sustainable Chemistry (Jan 2021)

Uranium adsorption and oil emulsification by extracellular polysaccharide (EPS) of a halophilic unicellular marine cyanobacterium Synechococcus elongatus BDU130911

Vijayaragavan Rashmi,
Arulraj Darshana,
Thangaraj Bhuvaneshwari,
Sushanta Kumar Saha,
Lakshmanan Uma,
Dharmar Prabaharan

Affiliations

Vijayaragavan Rashmi: National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India
Arulraj Darshana: National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India
Thangaraj Bhuvaneshwari: National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India
Sushanta Kumar Saha: Shannon Applied Biotechnology Centre, Limerick Institute of Technology, V94 E8YF, Moylish Park, Limerick, Ireland
Lakshmanan Uma: National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India
Dharmar Prabaharan: National Facility for Marine Cyanobacteria (Sponsored by DBT, Govt. of India), Department of Marine Biotechnology, Bharathidasan University, Tiruchirappalli, 620024, India; Corresponding author.

Journal volume & issue: Vol. 4
p. 100051

Abstract

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An integrated approach on uranium adsorption and emulsification of oils was evaluated using extracellular polysaccharides (EPS) of a marine unicellular cyanobacterium Synechococcus elongatus BDU130911. EPS gel of S. elongatus BDU130911 was able to adsorb uranium at the rate of 75% per gram dry weight. Uranium follows a monolayer adsorption onto EPS gel surface as revealed by Langmuir isotherm. Energy-dispersive X-ray fluorescence (EDXRF) analysis and powder X-ray diffraction analysis further confirms the uranium adsorption to the EPS gel of S. elongatus BDU130911. The culture filtrate of S. elongatus BDU130911 exhibited biosurfactant property and formed a stable emulsion with petrol (EI24 51.2%) due to the presence of uronic acid and rhamnose sugar. These findings suggest that the EPS of S. elongatus BDU130911 biomass has the potential to be used as a green adsorbing agent for the effective extraction of radionucleotide and petroleum hydrocarbons.

Published in Current Research in Green and Sustainable Chemistry

ISSN: 2666-0865 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/current-research-in-green-and-sustainable-chemistry

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