Molecular Fingerprints and Reactivity Evolution of Dissolved Organic Matter Leached from Coal under Geothermal Conditions.

ABSTRACT: Understanding the thermal behavior of coal-derived dissolved organic matter (DOM) is essential for assessing its environmental reactivity in deep mining environments. Accordingly, in this study, gas coal (GC) and anthracite, representing distinct coal ranks, were subjected to temperature-controlled static incubation experiments at 25 and 50 °C to investigate the temperature-induced release dynamics and molecular evolution of Coal-DOM under simulated subsurface conditions. A multianalytical strategy combining excitation-emission matrix spectroscopy, Fourier transform ion cyclotron resonance mass spectrometry, and machine learning (XGBoost-SHapley Additive exPlanations [SHAP]) was applied to characterize the molecular-level transformations of Coal-DOM. The results indicated that elevated tem

SUBMITTER: Wan Z 

PROVIDER: S-EPMC12809330 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature