Toward sulfur retention and H2S mitigation in composting: elucidating and validating the molecular pathway of Fe(II)/Fe(III)-driven sulfur incorporation into humic acid

Green Chem., 2026, Advance Article
DOI: 10.1039/D5GC05649G, Paper

Jin Zhou, Yiqi Yin, Jiaran Chen, Yu Deng, Rui Sun, Caihong Song, Zimin Wei
Fe(III) drives sulfur oxidation and stable fixation in humic acid, boosting sulfur–HA by 58.04% and slashing H₂S emissions by 94.68%, while Fe(II) leads to unstable intermediates. This work aids sulfur pollution control and waste resource recovery.
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