Dépôt numérique

Tropospheric H2 budget and the response of its soil uptake under the changing environment

Constant, Philippe ORCID logoORCID: https://orcid.org/0000-0003-2739-2801; Poissant, Laurier et Villemur, Richard ORCID logoORCID: https://orcid.org/0000-0001-9768-8937 (2009). Tropospheric H2 budget and the response of its soil uptake under the changing environment Science of the Total Environment , vol. 407 , nº 6. pp. 1809-1823. DOI: 10.1016/j.scitotenv.2008.10.064.

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Mol. hydrogen (H2) is an indirect greenhouse gas present at the trace level in the atm. So far, the sum of its sources and sinks is close to equil., but its large-scale utilization as an alternative energy carrier would alter its atm. burden. The magnitude of the emissions assocd. with a future H2-based economy is difficult to predict and remains a matter of debate. Previous attempts to predict the impact that a future H2-based economy would exert on tropospheric chem. were realized by considering a steady rate of microbial-mediated soil uptake, which is currently responsible of ∼ 80% of the tropospheric H2 losses. Although soil uptake, also known as dry deposition is the most important sink for tropospheric H2, microorganisms involved in the activity remain elusive. Given that microbial-mediated H2 soil uptake is influenced by several environmental factors, global change should exert a significant effect on the activity and then, assuming a steady H2 soil uptake rate for the future may be mistaken. Here, we present an overview of tropospheric H2 sources and sinks with an emphasis on microbial-mediated soil uptake process. Future researches are proposed to investigate the influence that global change would exert on H2 dry deposition and to identify microorganisms involved H2 soil uptake activity.

Type de document: Article
Mots-clés libres: Dry deposition; Global change; Hydrogen-based economy; Microbial soil uptake; Molecular Hydrogen
Centre: Centre INRS-Institut Armand Frappier
Date de dépôt: 29 juin 2024 21:00
Dernière modification: 29 juin 2024 21:00
URI: https://espace.inrs.ca/id/eprint/14508

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