Characterization of Cr(VI)-reducing indigenous bacteria from a long-term tannery waste-contaminated soil

Kabir, MM; Akter, T; Sabur, GM; Sultana, N; Fazlul Karim Mamun, M; Kabir, N; Didar-ul-Alam, M; Islam, MM; Chaity, FS; Tijing, L; Shon, HK

Characterization of Cr(VI)-reducing indigenous bacteria from a long-term tannery waste-contaminated soil

Kabir, MM Akter, T Sabur, GM Sultana, N Fazlul Karim Mamun, M Kabir, N Didar-ul-Alam, M Islam, MM Chaity, FS Tijing, L

Shon, HK

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Publisher:: ELSEVIER SCIENCE INC
Publication Type:: Journal Article
Citation:: Desalination and Water Treatment, 2024, 320
Issue Date:: 2024-10-01

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Field	Value	Language
dc.contributor.author	Kabir, MM
dc.contributor.author	Akter, T
dc.contributor.author	Sabur, GM
dc.contributor.author	Sultana, N
dc.contributor.author	Fazlul Karim Mamun, M
dc.contributor.author	Kabir, N
dc.contributor.author	Didar-ul-Alam, M
dc.contributor.author	Islam, MM
dc.contributor.author	Chaity, FS
dc.contributor.author	Tijing, L https://orcid.org/0000-0001-9398-6355
dc.contributor.author	Shon, HK
dc.date.accessioned	2025-03-17T01:51:34Z
dc.date.available	2025-03-17T01:51:34Z
dc.date.issued	2024-10-01
dc.identifier.citation	Desalination and Water Treatment, 2024, 320
dc.identifier.issn	1944-3994
dc.identifier.issn	1944-3986
dc.identifier.uri	http://hdl.handle.net/10453/185865
dc.description.abstract	This paper investigated the Cr (VI) detoxification potential of 4 novel bacterial strains isolated from a long-term tannery waste-contaminated soil. Molecular techniques were used to identify the bacterial strains using 16 S rDNA gene sequencing. The Cr (VI) detoxification capacity of the bacteria was determined by 1,5-diphenylcarbazide (DPC) methods. The identified bacterial strains were Bacillus subterraneus MMKT-10, Klebsiella quasivariicola MMKT-15, Acinetobacter seohaensis MMKT-19, and Staphylococcus saprophyticus MMKT-25. All the strains showed maximum tolerance concentration (MTC) of Cr (VI) up to 4000 mg/L. However, in terms of Cr(VI) reduction rate, K. quasivariicola can be considered the most efficient, reducing the two preliminary Cr(VI) concentrations (10 and 20 mg/L) at 15 and 18 h, respectively, while the rest of the strains needed 30 h to reduce the same concentrations from the culture medium. The favorable temperature for Cr(VI) detoxification ranged from 30–40 °C. However, 100 % Cr (VI) reduction was achieved by all the strains at 35 0C. Interestingly, all the bacterial strains reduced a significant amount of Cr (VI) at 50 0C, indicative of their thermotolerant nature. The ideal pH for Cr (VI) reduction was 7 for B. subterraneus MMKT-10 and K. quasivariicola MMKT-15, whereas it was 8 for Acinetobacter seohaensis MMKT-19 and Staphylococcus saprophyticus MMKT-25. The indigenous bacterial strains isolated in this study could be one of the promising candidates for the detoxification of Cr (VI) contaminated sites.
dc.language	English
dc.publisher	ELSEVIER SCIENCE INC
dc.relation	http://purl.org/au-research/grants/arc/ARC IH170100009
dc.relation.ispartof	Desalination and Water Treatment
dc.relation.isbasedon	10.1016/j.dwt.2024.100861
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4011 Environmental engineering
dc.title	Characterization of Cr(VI)-reducing indigenous bacteria from a long-term tannery waste-contaminated soil
dc.type	Journal Article
utslib.citation.volume	320
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-03-17T01:51:31Z
pubs.publication-status	Published
pubs.volume	320

Abstract:

This paper investigated the Cr (VI) detoxification potential of 4 novel bacterial strains isolated from a long-term tannery waste-contaminated soil. Molecular techniques were used to identify the bacterial strains using 16 S rDNA gene sequencing. The Cr (VI) detoxification capacity of the bacteria was determined by 1,5-diphenylcarbazide (DPC) methods. The identified bacterial strains were Bacillus subterraneus MMKT-10, Klebsiella quasivariicola MMKT-15, Acinetobacter seohaensis MMKT-19, and Staphylococcus saprophyticus MMKT-25. All the strains showed maximum tolerance concentration (MTC) of Cr (VI) up to 4000 mg/L. However, in terms of Cr(VI) reduction rate, K. quasivariicola can be considered the most efficient, reducing the two preliminary Cr(VI) concentrations (10 and 20 mg/L) at 15 and 18 h, respectively, while the rest of the strains needed 30 h to reduce the same concentrations from the culture medium. The favorable temperature for Cr(VI) detoxification ranged from 30–40 °C. However, 100 % Cr (VI) reduction was achieved by all the strains at 35 0C. Interestingly, all the bacterial strains reduced a significant amount of Cr (VI) at 50 0C, indicative of their thermotolerant nature. The ideal pH for Cr (VI) reduction was 7 for B. subterraneus MMKT-10 and K. quasivariicola MMKT-15, whereas it was 8 for Acinetobacter seohaensis MMKT-19 and Staphylococcus saprophyticus MMKT-25. The indigenous bacterial strains isolated in this study could be one of the promising candidates for the detoxification of Cr (VI) contaminated sites.

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