<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">M.R. Qin</style></author><author><style face="normal" font="default" size="100%">Chen, Z. M.</style></author><author><style face="normal" font="default" size="100%">H.Q. Shen</style></author><author><style face="normal" font="default" size="100%">H. Li</style></author><author><style face="normal" font="default" size="100%">H.H. Wu</style></author><author><style face="normal" font="default" size="100%">Y. Wang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Impacts of heterogeneous reactions to atmospheric peroxides: Observations and budget analysis study</style></title><secondary-title><style face="normal" font="default" size="100%">Atmospheric Environment</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2018</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1352231018302309</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">183</style></volume><pages><style face="normal" font="default" size="100%">144-153,</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Atmospheric peroxides play important roles in atmospheric chemistry, acting as reactive oxidants and reservoirs&lt;br&gt;of HO&lt;sub&gt;x&lt;/sub&gt; and RO&lt;sub&gt;x&lt;/sub&gt; radicals. Field measurements of atmospheric peroxides were conducted over urban Beijing from&lt;br&gt;2015 to 2016, including dust storm days, haze days and different seasons. We employed a box model based on&lt;br&gt;RACM2 mechanism to conduct concentration simulation and budget analysis of hydrogen peroxide (H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;) and&lt;br&gt;peroxyacetic acid (PAA). In this study, heterogeneous reaction is found to be a significant sink for atmospheric&lt;br&gt;H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; and PAA in urban Beijing. Here, we recommend a suitable uptake coefficient formula considering the&lt;br&gt;water effect for model research of peroxides. It is found that H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt; and PAA unexpectedly maintained considerable&lt;br&gt;concentrations on haze days, even higher than that on non-haze days. This phenomenon is mainly&lt;br&gt;ascribed to relatively high levels of volatile organic compounds and ozone on haze days. In addition, high levels&lt;br&gt;of water vapor in pollution episode can promote not only the heterogeneous uptake to aerosol phase but also the&lt;br&gt;production of H&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;. Atmospheric PAA formation is suggested to be sensitive to alkenes and NO&lt;sub&gt;x&lt;/sub&gt; in urban&lt;br&gt;Beijing. In particular, with the help of peroxides, sulfate formation rate from heterogeneous uptake could increase&lt;br&gt;by ∼4 times on haze days, indicating the potential effect of peroxides on enhancement of aerosol oxidative&lt;br&gt;property and secondary sulfate formation.&lt;/p&gt;</style></abstract></record></records></xml>