Abdul Aziz, Ainul Husna and Engliman, Nurul Sakinah and Mansor, Mariatul Fadzillah and Mohamed Abdul, Peer and Arisht, Shalini Narayanan and Jamali, Nur Syakina and Ming, Foong Tiang (2022) Synergistic enhancement of biohydrogen production by supplementing with green synthesized magnetic iron nanoparticles using thermophilic mixed bacteria culture. International Journal of Hydrogen Energy. ISSN 0360-3199 (In Press)
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Abstract
The production of biohydrogen can be improved by focusing on the nutrients needed by fermentative bacteria like iron. Iron reacts with the [Fe-Fe]-hydrogenase enzyme within the mixed bacteria culture for optimum hydrogen release. Iron nanoparticles (NPs) are attractive due to its unique properties and high reactivity. It can be produced through green synthesis, a more eco-friendly and relatively lower cost process, by using iron salt as precursor and green coconut shell extracted by deep eutectic solvent (DES) as reducing agent. The coconut shell extract consists of phytochemicals that help in producing poly�disperse magnetic iron oxide nanoparticles at ~75 nm in size. The addition of optimum concentration of 200 mg Fe/L magnetic iron NPs resulted in the maximum cumulative hydrogen production, glucose utilization and hydrogen yield of 101.33 mL, 9.12 g/L and 0.79 mol H2/mol glucose respectively. Furthermore, the kinetic analysis on Gompertz model using the optimum magnetic iron NPs concentration showed that the hydrogen production potential (P) and hydrogen production rate (Rm) increased to 50.69 mL and 3.30 mL/h respectively and the lag phase time reduced about 7.12 h as compared with the control experiment (0 mg Fe/L). These results indicated the positive effects of magnetic iron NPs supplementation on fermentative biohydrogen production of mixed bacteria culture and proved the feasibility of adding the magnetic iron NPs as the micronutrient for enhancement of such hydrogen production system.
| Item Type: | Article (Journal) |
|---|---|
| Uncontrolled Keywords: | Biohydrogen production Mixed bacteria culture Green synthesized magnetic nanoparticles |
| Subjects: | T Technology > TP Chemical technology > TP315 Fuel T Technology > TP Chemical technology > TP500 Fermentation industries. Beverages. Alcohol |
| Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): | Kulliyyah of Engineering > Department of Biotechnology Engineering Kulliyyah of Engineering |
| Depositing User: | Dr Nurul Sakinah Engliman |
| Date Deposited: | 17 Oct 2022 12:21 |
| Last Modified: | 17 Oct 2022 12:21 |
| URI: | http://irep.iium.edu.my/id/eprint/100679 |
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