Forums | HES 健康与环境科学

05 March 2023, 5:25 PM

Speaker: Ziyan Liu (PhD student)

Date: 2023-3-8
Time:13:00-13:30pm
Room: ES354

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Meeting ID: 307-1339-4734

Title: Reactive Oxygen Species-Driven Methane Formation At the Soil-Water Interfaces

Abstract:

Methane is a potent greenhouse gas that contributes to roughly 30% of global warming. Wetlands are the largest natural sources of methane and account for about one-third of total methane emission. Therefore, understanding the processes that form methane in the wetlands is of growing environmental significance. It has been known for long that methane is strictly formed under anaerobic condition by a specific group of archea. But some recent evidences show that oxic methane production exists, and a pathway driven by reactive oxygen species(ROS) has been reported. In this project, it is hypothesized that ROS-driven methane formation occurs in submerged environments where both ROS and organosulfur compounds are present. In the microcosm experiments, ROS formation was confirmed after the sediments and paddy soils incubated anaerobicly was exposed to oxygen. In the meanwhile, potential ROS-driven methane formation was observed. However, this finding needs to be further validated with new experiment design and method development.