Graphene/hydroxyapatite nano-composite for enhancement of hydrogen productivity from delignified duckweed

Theodor Bilharz Research Institute

Bibliographic Information

Authors: Tawfik A.; Tan X.; Elsamadony M.; Qyyum M.A.; Azzam A.M.; Mubashir M.; Ng H.S.; Akhtar M.S.; Khoo K.S.

Journal: Fuel

Publisher: Elsevier Ltd

Publication Date: December 2022

Volume / Issue: Volume 330

Article No.: 125537

ISSN: 162361

DOI: 10.1016/j.fuel.2022.125537

Scopus: View on Scopus

Document Type: Article

Authors and Affiliations

Tawfik A., Water Pollution Research Department, National Research Centre, 12622, Dokki, Cairo, Egypt; Tan X., College of Materials and Chemical Engineering, Heilongjiang Institute of Technology, Harbin, 150050, China, State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; Elsamadony M., Department of Public Works Engineering, Faculty of Engineering, Tanta University, Tanta City, 31521, Egypt; Qyyum M.A., Department of Petroleum & Chemical Engineering, Sultan Qaboos University, Muscat, Oman; Azzam A.M., Environmental Research Department, Theodor Bilharz Research Institute, Cairo, 12411, Egypt; Mubashir M., Department of Petroleum Engineering, School of Engineering, Asia Pacific University of Technology and Innovation, Kuala Lumpur, 57000, Malaysia; Ng H.S., Centre for Research and Graduate Studies, University of Cyberjaya, Persiaran Bestari, Cyberjaya, 63000, Selangor, Malaysia; Akhtar M.S., School of Chemical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea; Khoo K.S., Department of Chemical Engineering and Materials Science, Yuan Ze University, Taoyuan, Taiwan

Abstract

The incredible growth of the duckweed (DW) in the water ecosystem causes severe environmental problems and reduces biodiversity. Harvesting and valorization of such plants represents a challenge due to its richness with organics. Hydrogen productivity (HP) from dark fermentation of delignified duckweed (DDW) is the main objective of current research. The anaerobes cultures were immobilized on the Graphene/hydroxyapatite nano-composite (nG/HAP) for enhancement of hydrogen yield (HY) and enzymes activities. The HP of 13.5 ± 0.78 mL was obtained from the fermentation of native DW and significantly increased up to 208.9 ± 12.6 mL for delignified one. This was linked to an increase of the hydrogenase enzyme (HE) activities from 0.02 ± 0.0003 to 0.109 ± 0.004 mg M.B reduced/min. The HP was further increased up to 387.1 ± 13.6 mL for batches containing 80 mg/gVS of nG/HAP. nG/HAP inhibited the competitors and promoted the cooperators for the Firmicutes hydrogen producers. © 2022 Elsevier Ltd

Keywords

Duckweed; Microbial community; Nano-composite; Pre-treatment; Total reducing sugars; Biodiversity; Enzymes; Fermentation; Graphene; Hydrogen; Nanocomposites; Environmental problems; Enzymes activity; Microbial communities; Nano composite; Organics; Pre-treatments; Valorisation; Water ecosystems; Productivity

Citation Information

Scopus Citations: 17

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