Heating-Induced Redox Property Dynamics of Peat Soil Dissolved Organic Matter in a Simulated Peat Fire: Electron Exchange Capacity and Molecular Characteristics

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 2, 2025

Peatlands store one-third of the world's soil organic carbon. Globally increased fires altered peat matter chemistry, yet redox property and molecular dynamics peat-dissolved (PDOM) during remain poorly characterized, limiting our understanding postfire biogeochemical processes. Clarifying these dynamic changes is essential for effective peatland fire management. This study demonstrates temperature-dependent in electron exchange capacity (EEC) PDOM by simulating burning, significantly affecting microbial iron reduction. At low temperatures (200-250 °C), EEC remains constant releasing more phenolic moieties to enhance electron-donating (EDC). Higher (500 °C) diminish 90% consuming phenolic-quinone moieties. Pyrolytic (pyPDOM) contributes 40% soil, with this contribution declining at higher temperatures. Phenolic-quinone primary redox-active pyPDOM. Fourier transform ion cyclotron resonance mass spectrometry analysis shows that EDC depends on types than abundance, monophenol-like molecules (

Language: Английский

Reduction of iron-organic carbon associations shifts net greenhouse gas release after initial permafrost thaw

Soil Biology and Biochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 109735 - 109735

Published: Jan. 1, 2025

Language: Английский

Effective elimination of azithromycin antibiotic using nanoparticles prepared from curry neem tree bark

International Journal of Environmental & Analytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 21

Published: March 31, 2025

Language: Английский