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Comparison of Hydrogen Production Efficiency by Rhodopseudomonas palustris MP3 and Rhodopseudomonas harwoodiae SP6 Using an Iron Complex as an Enhancement Factor

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  • Fariha Kanwal

    (Environmental Science Department, Lahore College for Women University, Lahore 42000, Pakistan
    Department of Microbiology and Molecular Genetics, University of the Punjab, Lahore 54590, Pakistan
    School of Engineering, Australian National University, Canberra, ACT 2601, Australia
    School of Life and Environmental Sciences, Faculty of Science Engineering & Built Environment, Deakin University, Burwood, VIC 3125, Australia)

  • Arifa Tahir

    (Environmental Science Department, Lahore College for Women University, Lahore 42000, Pakistan)

  • Takuya Tsuzuki

    (School of Engineering, Australian National University, Canberra, ACT 2601, Australia)

  • David Nisbet

    (The Graeme Clark Institute, The University of Melbourne, Melbourne, VIC 3010, Australia
    Department of Biomedical Engineering, Faculty of Engineering and Information Technology, The University of Melbourne, Melbourne, VIC 3010, Australia
    Aikenhead Centre for Medical Discovery, St Vincent’s Hospital Melbourne, Melbourne, VIC 3065, Australia
    The Medical School, Faculty of Medicine, Dentistry and Health Science, The University of Melbourne, Melbourne, VIC 3010, Australia)

  • Junhong Chen

    (Geoscience Australia, Canberra, ACT 2601, Australia)

  • Angel A. J. Torriero

    (School of Life and Environmental Sciences, Faculty of Science Engineering & Built Environment, Deakin University, Burwood, VIC 3125, Australia)

Abstract

In the present study, an iron(II)-nanoscale organic complex (Fe-NO) was used as an enhancement factor by two different Rhodopseudomonas species of purple non-sulphur bacteria (PNSB) to produce hydrogen (H 2 ). The Fe-NO complex was synthesised using FeSO 4 ·7H 2 O and Eucalyptus viminalis —a native Australian plant leaf extract—in a 1:2 and 2:1 concentration ratio. Besides, FeSO 4 ·7H 2 O was also used as a source of iron(II) for comparison with the Fe-NO complex. The photo-fermentative bacterial cultures were isolated from a fishpond, and only two strains, MP3 and SP6, were found viable after several attempts of quadrate streaking. After phylogenetic analysis, these strains were designated as R. palustris MP3 and R. harwoodiae SP6. After comparison with the control, the results showed that the PNSBs manifested an approximately 50% higher H 2 yield when the 1:2 Fe-NO complex was used in the fermentation broth at 10 mg/L concentration, where 10.7 ± 0.54 and 10.0 ± 0.49 mL H 2 /L were obtained by R. palustris MP3 and R. harwoodiae SP6, respectively. The study revealed that the 1:2 Fe-NO complex could be an important material for efficient H 2 production.

Suggested Citation

  • Fariha Kanwal & Arifa Tahir & Takuya Tsuzuki & David Nisbet & Junhong Chen & Angel A. J. Torriero, 2023. "Comparison of Hydrogen Production Efficiency by Rhodopseudomonas palustris MP3 and Rhodopseudomonas harwoodiae SP6 Using an Iron Complex as an Enhancement Factor," Energies, MDPI, vol. 16(13), pages 1-10, June.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:13:p:5018-:d:1181859
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    References listed on IDEAS

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    1. Fariha Kanwal & Angel A. J. Torriero, 2022. "Biohydrogen—A Green Fuel for Sustainable Energy Solutions," Energies, MDPI, vol. 15(20), pages 1-20, October.
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