Research article - Peer-reviewed, 2021
Perspectives on Potential Applications of Nanometal Derivatives in Gaseous Bioenergy Pathways: Mechanisms, Life Cycle, and Toxicity
Elsamadony, Mohamed; Elreedy, Ahmed; Mostafa, Alsayed; Fujii, Manabu; Gescher, Johannes; Yekta, Sepehr Shakeri; Schnurer, Anna; Gaillard, Jean-Francois; Pant, DeepakAbstract
Nanosized metal derivatives (NMDs), referring to metals and their oxides, are extensively utilized as additives for anaerobic digestion (AD) and dark fermentation (DF) processes, for enhancing the production of methane (CH4) and hydrogen (H-2), respectively. NMDs-derived positive impacts were widely confirmed in many previous studies; however, no consensus exists about how these have been acquired. Undoubtedly, NMDs affect extracellular electron transfer (EET). Consequently, we explore how biotic-biotic interactions, referring to direct interspecies electron transfer (DIET) among AD partners, and biotic-abiotic exchanges, which are mediated by redox reactions with metals, are affected. In this perspective, the mechanisms behind all those effects are reviewed and explained in detail, considering the specific properties of each NMD, e.g., size and type. We discuss previous studies that offer contradicting interpretations about which process dominates metal oxidation, metal reduction, or DIET. In addition, the fate of NMDs residues in the digestate after the treatment process is discussed, focusing on NMDs toxicity. From previous literature, the environmental impacts are evaluated for the production process of NMDs that are utilized in AD and DF processes via life-cycle assessment. This review provides a comprehensive understanding of NMDs-microbes interactions, which are mandatory for (i) building clear scientific knowledge about processes in play and (ii) engineering favorable conditions to achieve optimum yields in AD and DF processes.Keywords
Nanoparticle; Direct interspecies electron transfer (DIET); Metal corrosion; Dissimilatory metal reduction; Toxicity; Lifecycle assessmentPublished in
ACS Sustainable Chemistry and Engineering2021, volume: 9, number: 29, pages: 9563-9589
Publisher: AMER CHEMICAL SOC
Authors' information
Elsamadony, Mohamed
Tanta University
Elreedy, Ahmed
Karlsruhe Institute of Technology
Mostafa, Alsayed
Inha University
Fujii, Manabu
Tokyo Institute of Technology
Gescher, Johannes
Karlsruhe Institute of Technology
Yekta, Sepehr Shakeri
Linkoping University
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Gaillard, Jean-Francois
Tokyo Institute of Technology
Pant, Deepak
VITO
Sustainable Development Goals
SDG7 Affordable and clean energy
UKÄ Subject classification
Chemical Process Engineering
Publication Identifiers
DOI: https://doi.org/10.1021/acssuschemeng.1c02260
URI (permanent link to this page)
https://res.slu.se/id/publ/113297