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Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity

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dc.contributor.authorHossan, Shanewazen
dc.contributor.authorHossain, Saddamen
dc.contributor.authorIslam, Mohammad Rafiqulen
dc.contributor.authorKabir, Mir Himayeten
dc.contributor.authorAli, Soburen
dc.contributor.authorIslam, Md Shafiqulen
dc.contributor.authorImran, Khan Mohammaden
dc.contributor.authorMoniruzzaman, M.en
dc.contributor.authorMou, Taslin Jahanen
dc.contributor.authorParvez, Anowar Khasruen
dc.contributor.authorMahmud, Zahid Hayaten
dc.date.accessioned2020-08-21T15:06:25Zen
dc.date.available2020-08-21T15:06:25Zen
dc.date.issued2020-08-19en
dc.date.updated2020-08-21T13:50:43Zen
dc.description.abstractChromium (Cr) (VI) has long been known as an environmental hazard that can be reduced from aqueous solutions through bioremediation by living cells. In this study, we investigated the efficiency of reduction and biosorption of Cr(VI) by chromate resistant bacteria isolated from tannery effluent. From 28 screened Cr(VI) resistant isolates, selected bacterial strain SH-1 was identified as <i>Klebsiella</i> sp. via 16S rRNA sequencing. In Luria&ndash;Bertani broth, the relative reduction level of Cr(VI) was 95%, but in tannery effluent, it was 63.08% after 72 h of incubation. The cell-free extract of SH-1 showed a 72.2% reduction of Cr(VI), which indicated a higher activity of Cr(VI) reducing enzyme than the control. Live and dead biomass of SH-1 adsorbed 51.25 mg and 29.03 mg Cr(VI) per gram of dry weight, respectively. Two adsorption isotherm models&mdash;Langmuir and Freundlich&mdash;were used for the illustration of Cr(VI) biosorption using SH-1 live biomass. Scanning electron microscopy (SEM) analysis showed an increased cell size of the treated biomass when compared to the controlled biomass, which supports the adsorption of reduced Cr on the biomass cell surface. Fourier-transform infrared analysis indicated that Cr(VI) had an effect on bacterial biomass, including quantitative and structural modifications. Moreover, the chickpea seed germination study showed beneficial environmental effects that suggest possible application of the isolate for the bioremediation of toxic Cr(VI).en
dc.description.versionPublished versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationHossan, S.; Hossain, S.; Islam, M.R.; Kabir, M.H.; Ali, S.; Islam, M.S.; Imran, K.M.; Moniruzzaman, M.; Mou, T.J.; Parvez, A.K.; Mahmud, Z.H. Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity. Int. J. Environ. Res. Public Health 2020, 17, 6013.en
dc.identifier.doihttps://doi.org/10.3390/ijerph17176013en
dc.identifier.urihttp://hdl.handle.net/10919/99827en
dc.language.isoenen
dc.publisherMDPIen
dc.rightsCreative Commons Attribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjecthexavalent chromiumen
dc.subjectchromium resistant bacteriaen
dc.subjectbiosorptionen
dc.subjectisothermen
dc.subjectphytotoxicityen
dc.titleBioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicityen
dc.title.serialInternational Journal of Environmental Research and Public Healthen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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