Articles | Volume 18, issue 8
https://doi.org/10.5194/acp-18-5607-2018
https://doi.org/10.5194/acp-18-5607-2018
Research article
 | 
24 Apr 2018
Research article |  | 24 Apr 2018

Sources and oxidative potential of water-soluble humic-like substances (HULISWS) in fine particulate matter (PM2.5) in Beijing

Yiqiu Ma, Yubo Cheng, Xinghua Qiu, Gang Cao, Yanhua Fang, Junxia Wang, Tong Zhu, Jianzhen Yu, and Di Hu

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Latest update: 06 Jun 2023
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Short summary
Water-soluble humic-like substances (HULISWS) are a potential toxic component of PM2.5 for their redox activity. In this study, we measured HULISWS and associated redox activity in PM2.5 sampled during a 1-year period in Beijing and investigated their sources. We found biomass burning and secondary aerosol formation were the major contributors (> 59 %) to both HULISWS and redox activity, and the combustion-related primary sources accounted for > 70 % of HULISWS and redox activity.
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