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

Journal article

Mwandira, W., Nakashima. K., Kawasaki, S, Arabelo, A., Banda, K., Nyambe, I., Chirwa, M., Ito, M., Sato, T., Igarashi, T., Nakayama, N., Hakuto, N. and Ishizuka, M (2022). Biosorption of Pb (II) and Zn (II) from aqueous solution by Oceanobacillus profundus isolated from an abandoned mine. Scientific Reports. 10 (21189). https://doi.org/10.1038/s41598-020-78187-4
AuthorsMwandira, W., Nakashima. K., Kawasaki, S, Arabelo, A., Banda, K., Nyambe, I., Chirwa, M., Ito, M., Sato, T., Igarashi, T., Nakayama, N., Hakuto, N. and Ishizuka, M
Abstract

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.

Year2022
JournalScientific Reports
Journal citation10 (21189)
PublisherSpringer
ISSN2045-2322
Digital Object Identifier (DOI)https://doi.org/10.1038/s41598-020-78187-4
Web address (URL)https://www.nature.com/articles/s41598-020-78187-4#citeas
Publication dates
Print03 Dec 2020
Publication process dates
Accepted20 Nov 2020
Deposited29 Apr 2022
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Open
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