Articles | Volume 26, issue 18
https://doi.org/10.5194/acp-26-13387-2026
https://doi.org/10.5194/acp-26-13387-2026
Research article
 | 
23 Sep 2026
Research article |  | 23 Sep 2026

Complexation strength between organic carbon and transition metal ions dominates the photochemical conversion of SO2 to sulfates

Shaojie Yang, Shiwei Lai, Jianwei Zheng, Hao Na, Fu Li, Wangjin Yang, and Chong Han

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Cited articles

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Short summary
Organic carbon (OC) coexists with transition metal ions (TMIs) in atmospheric aerosols. The complexation behaviors of OC and TMIs can occur according to spectroscopic evidences. The specific complexation property of TMIs toward OC significantly modulated the generation of reactive species, especially for hydroxyl radicals (•OH) serving as the key oxidant for sulfate production. This exerts positive or negative roles of TMIs in the photoconversion of SO2 to sulfates on OC.
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