<?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%">Chen, Z. M.</style></author><author><style face="normal" font="default" size="100%">X.L. Shen</style></author><author><style face="normal" font="default" size="100%">D. Huang</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Heterogeneous reactions of gaseous hydrogen peroxide on pristine and acidic gas-processed calcium carbonate particles: effects of relative humidity and surface coverage of coating</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%">2013</style></year></dates><volume><style face="normal" font="default" size="100%">67</style></volume><pages><style face="normal" font="default" size="100%">63-72</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;Atmospheric aging appears to alter physical and chemical properties of mineral dust aerosol and thus its role as reactive surface in the troposphere. Yet, previous studies in the atmosphere have mainly focused on the pristine surfaces of mineral dust aerosol, and the reactivity of aged mineral dust toward atmospheric trace gases is poorly recognized. This work presents the first laboratory investigation of heterogeneous reactions of gaseous 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;), an important atmospheric oxidant, on the surfaces of HNO&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 SO&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;-processed calcium carbonate particles as surrogates of atmospheric mineral dust aged by acidic trace gases. It is found that the processing of the calcium carbonate particles with HNO&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 SO&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; has a strong impact on their reactivity toward 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 HNO&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;-processed particles, the presence of nitrate acts to either decrease or increase 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, greatly depending on RH and surface coverage of nitrate. On SO&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;-processed particles, the presence of surface sulfite appears to enhance the intrinsic reactivity of the mineral particles due to its affinity for 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 uptake 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; increases significantly relative to the pristine particles, in particular at high RH. The mechanisms for heterogeneous reactions 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; with these processed particles are discussed, as well as their potential implications on tropospheric chemistry. The results of our study suggest that the reactivity of mineral dust aerosol toward 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 maybe other trace gases is markedly dependent on the chemical composition and coverage of the coatings as well as ambient RH, and thus will vary considerably in different polluted air masses.&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></record></records></xml>