Articles | Volume 19, issue 1
https://doi.org/10.5194/acp-19-315-2019
https://doi.org/10.5194/acp-19-315-2019
Research article
 | 
09 Jan 2019
Research article |  | 09 Jan 2019

Diel variation in mercury stable isotope ratios records photoreduction of PM2.5-bound mercury

Qiang Huang, Jiubin Chen, Weilin Huang, John R. Reinfelder, Pingqing Fu, Shengliu Yuan, Zhongwei Wang, Wei Yuan, Hongming Cai, Hong Ren, Yele Sun, and Li He

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Latest update: 14 Dec 2024
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Short summary
Although the specific reactions and mechanisms in fine aerosols could not be explicitly determined from this field study, our results provide isotopic evidence that local daily photochemical reduction of divalent Hg is of critical importance to the fate of PM2.5-Hg in urban atmospheres and that, in addition to variation in sources, photochemical reduction appears to be an important process that affects both the particle mass-specific abundance and isotopic composition of PM2.5-Hg.
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