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Title: A Novel Exopolysaccharide with Metal Adsorption Capacity Produced by a Marine Bacterium Alteromonas sp. JL2810

Journal Article · · Marine Drugs
DOI:https://doi.org/10.3390/md15060175· OSTI ID:1423643
 [1];  [1];  [1];  [1];  [1]
  1. Xiamen Univ., Xiamen (China). State Key Lab. of Marine Environmental Science, Inst. of Marine Microbes and Ecospheres

Most marine bacteria can produce exopolysaccharides (EPS). However, very few structures of EPS produced by marine bacteria have been determined. The characterization of EPS structure is important for the elucidation of their biological functions and ecological roles. In this study, the structure of EPS produced by a marine bacterium, Alteromonas sp. JL2810, was characterized, and the biosorption of the EPS for heavy metals Cu2+, Ni2+, and Cr6+ was also investigated. Nuclear magnetic resonance (NMR) analysis indicated that the JL2810 EPS have a novel structure consisting of the repeating unit of [-3)-α-Rhap-(1→3)-α-Manp-(1→4)-α-3OAc-GalAp-(1→]. The biosorption of the EPS for heavy metals was affected by a medium pH; the maximum biosorption capacities for Cu2+ and Ni2+ were 140.8-8.2 mg/g and 226.3-3.3 mg/g at pH 5.0; however, for Cr6+ it was 215.2-5.1 mg/g at pH 5.5. Infrared spectrometry analysis demonstrated that the groups of O-H, C=O, and C-O-C were the main function groups for the adsorption of JL2810 EPS with the heavy metals. The adsorption equilibrium of JL2810 EPS for Ni2+ was further analyzed, and the equilibrium data could be better represented by the Langmuir isotherm model. The novel EPS could be potentially used in industrial applications as a novel bio-resource for the removal of heavy metals.

Research Organization:
Univ. of Georgia, Athens, GA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-93ER20097
OSTI ID:
1423643
Journal Information:
Marine Drugs, Vol. 15, Issue 12; ISSN 1660-3397
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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Cited By (8)

Nanoparticles for the Treatment of Oral Biofilms: Current State, Mechanisms, Influencing Factors, and Prospects journal November 2019
Kinetics and mechanisms of mercury biosorption by an exopolysaccharide producing marine isolate Bacillus licheniformis journal September 2017
Microalgal extracellular polymeric substances and their interactions with metal(loid)s: A review journal March 2019
Multiple Megaplasmids Confer Extremely High Levels of Metal Tolerance in Alteromonas Strains journal November 2019
Exploration of an Extracellular Polymeric Substance from Earthworm Gut Bacterium (Bacillus licheniformis) for Bioflocculation and Heavy Metal Removal Potential journal January 2020
Deep-sea Hydrothermal Vent Bacteria as a Source of Glycosaminoglycan-Mimetic Exopolysaccharides journal May 2019
Halomonas Rhizobacteria of Avicennia marina of Indian Sundarbans Promote Rice Growth Under Saline and Heavy Metal Stresses Through Exopolysaccharide Production journal May 2019
Genome Sequencing of Mesonia algae K4-1 Reveals Its Adaptation to the Arctic Ocean journal December 2019

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