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Person: Karine Alain

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Publications > Journal Article

Published: April 6, 2022

Environmental Microbiology

Sulfur disproportionation is exergonic in the vicinity of marine hydrothermal vents

Authors: Karine Alain, Heidi S. Aronson, Maxime Allioux, Stéven Yvenou, Jan P. Amend

C-DEBI Contribution Number: 606

Publications > Journal Article

Environmental Microbiology

Sulfur disproportionation is exergonic in the vicinity of marine hydrothermal vents

Authors: Karine Alain, Heidi S. Aronson, Maxime Allioux, Stéven Yvenou, Jan P. Amend

Published: April 6, 2022

C-DEBI Contribution Number: 606

Abstract

In this article, we use a thermodynamic approach and a range of physico-chemical parameters (i.e. temperature, pressure, salinity, pH, sulfate, sulfide) to predict the Gibbs energy of reaction for S⁰ disproportionation in seawater. We then calculate the free-energy values of S⁰ disproportionation from environmental data at four hydrothermal sites located in different geological settings and characterized by contrasted fluid compositions. We show that S⁰ disproportionation is energetically favourable in most, if not all, niches of the hydrothermal vent ecosystem, whatever the geological and geochemical context and depth.

Source: http://dx.doi.org/10.1111/1462-2920.15975

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