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Alpha-glucan: a novel bacterial polysaccharide and its application as a biosorbent for heavy metals.

Authors
  • Abd-El-Haleem, Desouky1
  • 1 Environmental Biotechnology Department, Genetic Engineering and Biotechnology Institute, City of Scientific Research and Technological Applications, Burgelarab, Alexandria, 21934, Egypt. [email protected]. , (Egypt)
Type
Published Article
Journal
Journal, genetic engineering & biotechnology
Publication Date
Nov 22, 2023
Volume
21
Issue
1
Pages
133–133
Identifiers
DOI: 10.1186/s43141-023-00609-3
PMID: 37993735
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

This study identified an extracellular bacterial polysaccharide produced by Bacillus velezensis strain 40B that contains more than 90% of the monosaccharide glucose as alpha-glucan. A prominent peak at 1074 cm-1, a characteristic of glycoside couplings, was visible in the FTIR spectrum. There were traces of xylose, sucrose, and lactose, according to the HPLC study. The ability of this bacterial glucan to operate as a biosorbent of the heavy metals cobalt, chromium, copper, and lead from aqueous solutions was investigated in conjunction with Ca-alginate beads. It proved that glucan 40B has a low affinity for chromium ions and is selective for lead. Initial concentration measurements showed an inverse relationship between concentration and the amount of metal ions eliminated. Lead and chromium removal increased as the glucan dose was increased. It was shown that as the pH of the starting solution is elevated, there is an increase in the sorption of metal ions onto the glucan. It was clear that when the temperature increased, the fraction of metal ion sorption slightly increased. Glucan has a wide range of industrial applications, from food and medicine to health and nutrition. As a result, the investigation's scope was expanded to include heavy metal removal. © 2023. The Author(s).

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