Biosorption of Pb (II) and Zn (II) from aqueous solution by Oceanobacillus profundus isolated from an abandoned mine

The present study investigated biosorption of Pb (II) and Zn (II) using a heavy metal tolerant bacterium Oceanobacillus profundus KBZ 3-2 isolated from a contaminated site. The effects of process parameters such as effect on bacterial growth, pH and initial lead ion concentration were studied. The r...

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Bibliographic Details
Published in:Scientific reports 2020-12, Vol.10 (1), p.21189, Article 21189
Main Authors: Mwandira, Wilson, Nakashima, Kazunori, Kawasaki, Satoru, Arabelo, Allison, Banda, Kawawa, Nyambe, Imasiku, Chirwa, Meki, Ito, Mayumi, Sato, Tsutomu, Igarashi, Toshifumi, Nakata, Hokuto, Nakayama, Shouta, Ishizuka, Mayumi
Format: Article
Language:English
Subjects:
631/61
704/172
Abandoned mines
Adsorption
Anthropogenic factors
Aqueous solutions
Bacillaceae - drug effects
Bacillaceae - growth & development
Bacillaceae - metabolism
Bacteria
Bioaccumulation
Biodegradation, Environmental
Biosorption
Chelation
Contamination
Culture Media
Exports
Heavy metals
Humanities and Social Sciences
Hydrogen-Ion Concentration
Investigations
Lead
Lead - metabolism
Localization
Metabolism
Metabolites
Mining
multidisciplinary
Oceanobacillus
pH effects
Pollutants
Polysaccharides
Saccharides
Science
Science (multidisciplinary)
Solutions
Water Pollutants, Chemical - metabolism
Water pollution
Zambia
Zinc
Zinc - metabolism
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Summary:The present study investigated biosorption of Pb (II) and Zn (II) using a heavy metal tolerant bacterium Oceanobacillus profundus KBZ 3-2 isolated from a contaminated site. The effects of process parameters such as effect on bacterial growth, pH and initial lead ion concentration were studied. The results showed that the maximum removal percentage for Pb (II) was 97% at an initial concentration of 50 mg/L whereas maximum removal percentage for Zn (II) was at 54% at an initial concentration of 2 mg/L obtained at pH 6 and 30 °C. The isolated bacteria were found to sequester both Pb (II) and Zn (II) in the extracellular polymeric substance (EPS). The EPS facilitates ion exchange and metal chelation-complexation by virtue of the existence of ionizable functional groups such as carboxyl, sulfate, and phosphate present in the protein and polysaccharides. Therefore, the use of indigenous bacteria in the remediation of contaminated water is an eco-friendly way of solving anthropogenic contamination.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-020-78187-4