<?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%">Y. Zhao</style></author><author><style face="normal" font="default" size="100%">D. Huang</style></author><author><style face="normal" font="default" size="100%">H.L. Huang</style></author><author><style face="normal" font="default" size="100%">Chen, Z. M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Hydrogen peroxide enhances the oxidation of oxygenated volatile organic compounds on mineral dust particles: a case study of methacrolein</style></title><secondary-title><style face="normal" font="default" size="100%">Environmental Science &amp; Technology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2014</style></year></dates><volume><style face="normal" font="default" size="100%">48</style></volume><pages><style face="normal" font="default" size="100%">10614-10623</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;margin: 0cm 0cm 0pt;&quot;&gt;&lt;span style='font-family: &quot;Times New Roman&quot;,&quot;serif&quot;;'&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;span style=&quot;font-size: medium;&quot;&gt;Heterogeneous oxidation of oxygenated volatile organic compounds (OVOCs) serves as an important sink of OVOCs as well as a source of secondary organic material. However, the roles of gas phase oxidants in these reactions are poorly understood. In this work, we present the first laboratory study of the heterogeneous reactions of methacrolein (MACR) on various mineral dust particles in the presence of gaseous H&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;. It is found that the presence of gaseous H&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; significantly promotes both the uptake and oxidation of MACR on kaolinite, α-Al&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, α-Fe&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, and TiO&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, but not on CaCO&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;. The oxidation of MACR produces organic acids as its major low-molecular-weight product, whose yields are enhanced by a factor of 2−6 in the presence of H2O2. In addition, organic peroxides such as methyl hydroperoxide, peroxyformic acid, and peroxyacetic acid are only formed in the presence of H&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, and the formation of methyl hydroperoxide indicates that MACR oxidation on the surface involves reaction with OH radicals. A probe reaction using salicylic acid verifies the production of OH radicals from H&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; decomposition on kaolinite, α-Al&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, α-Fe&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, and TiO&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, which rationalizes the enhanced MACR oxidation observed on these particles. The uptake coefficients of MACR on kaolinite, α-Fe&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;3&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, and TiO&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; in the presence of H&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;O&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; are on the order of 10&lt;/span&gt;&lt;sup&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;−5&lt;/span&gt;&lt;/sup&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;−10&lt;/span&gt;&lt;sup&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;−4&lt;/span&gt;&lt;/sup&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;. Our results provide new insights into the formation and chemical evolution of organic species in the atmosphere.&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-family: 宋体; font-size: medium;&quot;&gt; &lt;/span&gt;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">18</style></issue></record></records></xml>