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

Abstract

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 removalmore » of heavy metals.« less

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Xiamen Univ., Xiamen (China). State Key Lab. of Marine Environmental Science, Inst. of Marine Microbes and Ecospheres
Publication Date:
Research Org.:
Univ. of Georgia, Athens, GA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1423643
Grant/Contract Number:  
FG02-93ER20097
Resource Type:
Accepted Manuscript
Journal Name:
Marine Drugs
Additional Journal Information:
Journal Volume: 15; Journal Issue: 12; Journal ID: ISSN 1660-3397
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; exopolysaccharide; marine bacteria; Alteromonas; metal adsorption

Citation Formats

Zhang, Zilian, Cai, Ruanhong, Zhang, Wenhui, Fu, Yingnan, and Jiao, Nianzhi. A Novel Exopolysaccharide with Metal Adsorption Capacity Produced by a Marine Bacterium Alteromonas sp. JL2810. United States: N. p., 2017. Web. doi:10.3390/md15060175.
Zhang, Zilian, Cai, Ruanhong, Zhang, Wenhui, Fu, Yingnan, & Jiao, Nianzhi. A Novel Exopolysaccharide with Metal Adsorption Capacity Produced by a Marine Bacterium Alteromonas sp. JL2810. United States. https://doi.org/10.3390/md15060175
Zhang, Zilian, Cai, Ruanhong, Zhang, Wenhui, Fu, Yingnan, and Jiao, Nianzhi. Mon . "A Novel Exopolysaccharide with Metal Adsorption Capacity Produced by a Marine Bacterium Alteromonas sp. JL2810". United States. https://doi.org/10.3390/md15060175. https://www.osti.gov/servlets/purl/1423643.
@article{osti_1423643,
title = {A Novel Exopolysaccharide with Metal Adsorption Capacity Produced by a Marine Bacterium Alteromonas sp. JL2810},
author = {Zhang, Zilian and Cai, Ruanhong and Zhang, Wenhui and Fu, Yingnan and Jiao, Nianzhi},
abstractNote = {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.},
doi = {10.3390/md15060175},
journal = {Marine Drugs},
number = 12,
volume = 15,
place = {United States},
year = {Mon Jun 12 00:00:00 EDT 2017},
month = {Mon Jun 12 00:00:00 EDT 2017}
}

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