Metal removal and reduction potential of an exopolysaccharide produced by Arctic psychrotrophic bacterium Pseudomonas sp. PAMC 28620
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- Title
- Metal removal and reduction potential of an exopolysaccharide produced by Arctic psychrotrophic bacterium Pseudomonas sp. PAMC 28620
- Authors
- Sathiyanarayanan, Ganesan
Bhatia, Shashi Kant
Kim, Hyun Joong
Kim, Jung-Ho
Jeon, Jong-Min
Kim, Yun-Gon
Park, Sung-Hee
Lee, Sang Hyun
Lee, Yoo Kyung
Yang, Yung-Hun
- Subject
- Chemistry
- Keywords
- Arctic; Metal removal; Pseudomonas; Exopolysaccharide; Psychrotrophic bacterium
- Issue Date
- 2016
- Citation
- Sathiyanarayanan, Ganesan., et al. 2016. Metal removal and reduction potential of an exopolysaccharide produced by Arctic
psychrotrophic bacterium Pseudomonas sp. PAMC 28620. RSC Adv., 6(99):96870-96881.
- Abstract
- An exopolysaccharide (EPS) was produced from psychrotrophic Arctic glacier fore-field soil bacterium
Pseudomonas sp. PAMC 28620 using glycerol enriched medium, where the maximum productivity 7.24 ± 0.31 g L-1 with 8.74 ± 0.14 g L-1 of biomass was obtained after 168 h of fermentation. The EPS was purified and analysed by
HPLC, GC-MS, FT-IR, 1H and 13C NMR. The EPS obtained from Arctic strain PAMC 28620 exhibits a distinctive
structural composition and the constituent sugar monomers are rhamnose, galactose, glucose, fucose, mannose and
ribose. The purified EPS had shown excellent flocculating and emulsification capacities with promising biotechnological
and ecological implications. From the metal removal experiments, the EPS exhibited remarkable metal adsorption (99%)
potential adopting the order Fe2+>Cu2+>Mg2+>Zn2+>Mn2+>Ca2+. FE-SEM combined with EDX analysis has shown that the
metal ions were complexed or immobilized onto the EPS matrix and further reduced to nanoparticles (150-950 nm). This
study is significant in terms of metal removal and reduction potential of Arctic bacterial EPS and the possible
ecological roles of the EPS in Arctic environment.
- DOI
- 10.1039/c6ra17450g
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