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Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity

Author

Listed:
  • Shanewaz Hossan

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh
    Department of Microbiology, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh
    These authors contributed equally to this work.)

  • Saddam Hossain

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh
    Industrial Microbiology Research Division, Bangladesh Council of Scientific and Industrial Research, Chittagong 4220, Bangladesh
    These authors contributed equally to this work.)

  • Mohammad Rafiqul Islam

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • Mir Himayet Kabir

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • Sobur Ali

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • Md Shafiqul Islam

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • Khan Mohammad Imran

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • M. Moniruzzaman

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

  • Taslin Jahan Mou

    (Department of Microbiology, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh)

  • Anowar Khasru Parvez

    (Department of Microbiology, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh)

  • Zahid Hayat Mahmud

    (Laboratory of Environmental Health, Laboratory Sciences and Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka 1212, Bangladesh)

Abstract

Chromium (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 Klebsiella sp. via 16S rRNA sequencing. In Luria–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—Langmuir and Freundlich—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).

Suggested Citation

  • Shanewaz Hossan & Saddam Hossain & Mohammad Rafiqul Islam & Mir Himayet Kabir & Sobur Ali & Md Shafiqul Islam & Khan Mohammad Imran & M. Moniruzzaman & Taslin Jahan Mou & Anowar Khasru Parvez & Zahid , 2020. "Bioremediation of Hexavalent Chromium by Chromium Resistant Bacteria Reduces Phytotoxicity," IJERPH, MDPI, vol. 17(17), pages 1-19, August.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:17:p:6013-:d:400740
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    References listed on IDEAS

    as
    1. Arezoo Dadrasnia & Kelvin Swee Chuan Wei & Nasser Shahsavari & Mohd Sofian Azirun & Salmah Ismail, 2015. "Biosorption Potential of Bacillus salmalaya Strain 139SI for Removal of Cr(VI) from Aqueous Solution," IJERPH, MDPI, vol. 12(12), pages 1-18, December.
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