Stable Isotopes Reveal Photoreduction of Particle-Bound Mercury Driven by Water-Soluble Organic Carbon during Severe Haze
Ke Zhang, Wang Zheng, Ruoyu Sun, Sheng He, Wangcai Shuai, Xiongfei Fan, Shengliu Yuan, Pingqing Fu, Junjun Deng, Xiaodong Li, Shuxiao Wang, Jiubin Chen
Abstract
Hg with WSOC and relative humidity and confirmed by our laboratory-controlled photoreduction experiment. The results show that, on average, 21% of PBM are likely photoreduced and re-emitted back to the atmosphere as Hg(0), potentially requiring revision of atmospheric Hg budgeting and modeling. This study highlights the release of large portions of PBM back to the gas phase through photoreduction, which needs to be taken into account while evaluating the atmospheric Hg cycle and the relative ecological effects.
Topics & Concepts
HazeEnvironmental chemistryRelative humidityTotal organic carbonDissolved organic carbonParticle (ecology)ChemistryEnvironmental scienceAtmospheric sciencesAtmospheric chemistryMeteorologyOzoneEcologyBiologyPhysicsGeologyOrganic chemistryMercury impact and mitigation studiesAir Quality and Health ImpactsToxic Organic Pollutants Impact