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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/038/06/1533-1538

    • Keywords

       

      Iron nanoparticles; green synthesis; Syzygium cumini; dark fermentation; biohydrogen production; Enterobacter cloacae.

    • Abstract

       

      In recent years the application of metal nanoparticles is gaining attention in various fields. The present study focuses on the additive effect of `green’ synthesized iron nanoparticles (FeNPs) on dark fermentative hydrogen (H2) production by a mesophilic soil bacterium Enterobacter cloacae. The FeNPs were synthesized by a rapid green method from FeSO4 using aqueous leaf extract of Syzygium cumini. The synthesized FeNPs showed a characteristic surface plasmon resonance peak at 267 nm. The transmission electron microscopy images confirm that the formation of FeNPs was mainly porous and irregular in shape, with an average particle size of 20–25 nm. The presence of iron (Fe) in the synthesized FeNPs was confirmed by energy-dispersive X-ray spectroscopy. The comparative effect of FeSO4 and FeNPs on batch fermentative H2 production from glucose was investigated. The fermentation experiments reveal that the percentage and yield of H2 in FeNPs supplementation were increased significantly than the control (no supplementation) and FeSO4 containing media. The maximum H2 yield of 1.9 mol mol−1 glucose utilized was observed in 100 mg l−1 FeNPs supplementation, with two-fold increase in glucose conversion efficiency. Thus, the result suggests that FeNPs supplementation in place of FeSO4 could improve the bioactivity of H2 producing microbes for enhanced H2 yield and glucose consumption.

    • Author Affiliations

       

      Dhrubajyoti Nath1 Ajay Kumar Manhar1 Kuldeep Gupta1 Devabrata Saikia1 Shymal Kumar Das2 Manabendra Mandal1

      1. Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Tezpur 784 028, Assam, India
      2. Department of Physics, Tezpur University, Napaam, Tezpur 784 028, Assam, India

    • Dates

       
      Published
      October 2015
      Manuscript received
      9 June 2015
      Accepted
      24 June 2015

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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