<?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%">Q.Q. Wu</style></author><author><style face="normal" font="default" size="100%">L.B. Huang</style></author><author><style face="normal" font="default" size="100%">H. Liang</style></author><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%">Chen, Z. M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Heterogeneous reaction of peroxyacetic acid and hydrogen peroxide on ambient aerosol particles under dry and humid conditions: kinetics, mechanism and implications</style></title><secondary-title><style face="normal" font="default" size="100%">Atmospheric Chemistry and Physics</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2015</style></year></dates><volume><style face="normal" font="default" size="100%">15</style></volume><pages><style face="normal" font="default" size="100%">6851-6866</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-family: 宋体; font-size: medium;&quot;&gt; &lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;span style=&quot;font-size: medium;&quot;&gt;Hydrogen peroxide (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;) and organic peroxides play important roles in the cycle of oxidants and the formation of secondary aerosols in the atmosphere. Recent field observations have suggested that the budget of peroxyacetic acid (PAA, CH&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;C(O)OOH) is potentially related to the aerosol phase processes, especially to secondary aerosol formation. Here, we present the first laboratory measurements of the uptake coefficient of gaseous PAA and 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; onto ambient fine particulate matter (PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;) as a function of relative humidity (RH) at 298 K. The results show that the PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, which was collected in an urban area, can take up PAA and 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; at the uptake coefficient (r&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;span style=&quot;font-size: medium;&quot;&gt;) of 10&lt;/span&gt;&lt;sup&gt;&lt;span style=&quot;font-size: small;&quot;&gt;-4&lt;/span&gt;&lt;/sup&gt;&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, and both&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;g&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;span style=&quot;font-size: medium;&quot;&gt; r&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;PAA&lt;/span&gt;&lt;/sub&gt;&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; and r&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;H&lt;/span&gt;&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;O&lt;/span&gt;&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span style=&quot;font-size: medium;&quot;&gt; increase with increasing RH. The value of r&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;PAA&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;font-size: medium;&quot;&gt; at 90%RH is 5.4±1.9 times that at 3%RH, whereas r&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;H&lt;/span&gt;&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;sub&gt;&lt;span style=&quot;font-size: small;&quot;&gt;O&lt;/span&gt;&lt;/sub&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span style=&quot;font-size: medium;&quot;&gt; at 90%RH is 2.4±&lt;/span&gt;&lt;/span&gt;&lt;span style=&quot;color: rgb(0, 0, 0);&quot;&gt;&lt;span style=&quot;font-size: medium;&quot;&gt;0.5 times that at 3%RH, which suggests that PAA is more sensitive to the RH variation than 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; is. Considering the larger Henry’s law constant 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; than that of PAA, the smaller RH sensitivity of the 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; uptake coefficient suggests that the enhanced uptake of peroxide compounds on PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; under humid conditions is dominated by chemical processes rather than dissolution. Considering that mineral dust is one of the main components of PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; in Beijing, we also determined the uptake coefficients of gaseous PAA and 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; on authentic Asian Dust storm (ADS) and Arizona Test Dust (ATD) particles. Compared to ambient PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, ADS shows a similar value and RH dependence in its uptake coefficient for PAA and 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;, while ATD gives a negative dependence on RH. The present study indicates that, in addition to the mineral dust in PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;, other components (e.g., soluble inorganic salts) are also important to the uptake of peroxide compounds. When the heterogeneous reaction of PAA on PM&lt;/span&gt;&lt;sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: small;&quot;&gt;2.5&lt;/span&gt;&lt;/sub&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt; is considered, its atmospheric lifetime is estimated to be 3.0 h on haze days and 7.1 h on non-haze days, values that are in good agreement with the field observations.&lt;/span&gt;&lt;/p&gt;
&lt;p&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-size: medium;&quot;&gt;&lt;span style=&quot;color: rgb(0, 0, 0); font-family: 宋体; font-size: medium;&quot;&gt; &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%">12</style></issue></record></records></xml>