Photochemistry of mineral dust surface as a potential atmospheric renoxification process
The nitrate formation on dust particles is considered as a sink for atmospheric NOy (such as HNO3). However mineral dust is shown here to be an effective photocatalyst for transformation of nitrate anions into NO and NO2, without involving its photolysis. The photodecomposition of NO3− at the surfac...
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| Veröffentlicht in: | Geophysical research letters 2009-03, Vol.36 (5), p.n/a |
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| creator | Ndour, Marieme Conchon, Pierre D'Anna, Barbara Ka, Oumar George, Christian |
| description | The nitrate formation on dust particles is considered as a sink for atmospheric NOy (such as HNO3). However mineral dust is shown here to be an effective photocatalyst for transformation of nitrate anions into NO and NO2, without involving its photolysis. The photodecomposition of NO3− at the surface of synthetic mineral dust samples of SiO2, TiO2, mixed TiO2‐SiO2 and authentic sand doped with 6% NO3− was studied by means of a flow‐tube at 298 K with UV‐illumination in the 340–420 nm range at relative humidities between 5 and 80%. Both NO and NO2 are observed during irradiation of films composed of either mixed TiO2‐SiO2, pure TiO2 and authentic minerals from the Sahara. The relative humidity strongly affects the concentration of NOx released into the gas phase. The photoinduced nitrate conversion into NOx is discussed as being a potential renoxification process of the atmosphere. |
| doi_str_mv | 10.1029/2008GL036662 |
| format | Article |
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However mineral dust is shown here to be an effective photocatalyst for transformation of nitrate anions into NO and NO2, without involving its photolysis. The photodecomposition of NO3− at the surface of synthetic mineral dust samples of SiO2, TiO2, mixed TiO2‐SiO2 and authentic sand doped with 6% NO3− was studied by means of a flow‐tube at 298 K with UV‐illumination in the 340–420 nm range at relative humidities between 5 and 80%. Both NO and NO2 are observed during irradiation of films composed of either mixed TiO2‐SiO2, pure TiO2 and authentic minerals from the Sahara. The relative humidity strongly affects the concentration of NOx released into the gas phase. The photoinduced nitrate conversion into NOx is discussed as being a potential renoxification process of the atmosphere.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2008GL036662</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Anions ; Atmospheric aerosols ; Atmospheric sciences ; Catalysis ; Chemical Sciences ; Dust ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Irradiation ; Nitrates ; Nitrogen dioxide ; nitrogen oxides ; Photochemistry ; Photolysis ; Relative humidity ; Titanium dioxide ; Troposphere</subject><ispartof>Geophysical research letters, 2009-03, Vol.36 (5), p.n/a</ispartof><rights>Copyright 2009 by the American Geophysical Union.</rights><rights>2009 INIST-CNRS</rights><rights>Copyright 2009 by American Geophysical Union</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a5651-de580a8c55cc664e15f274c04586610249b6466b876847b90c44e77cc1a2f4c23</citedby><cites>FETCH-LOGICAL-a5651-de580a8c55cc664e15f274c04586610249b6466b876847b90c44e77cc1a2f4c23</cites><orcidid>0000-0003-1578-7056 ; 0000-0001-8915-4097</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2008GL036662$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2008GL036662$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1417,1433,11514,27924,27925,45574,45575,46409,46468,46833,46892</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21386730$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00463256$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Ndour, Marieme</creatorcontrib><creatorcontrib>Conchon, Pierre</creatorcontrib><creatorcontrib>D'Anna, Barbara</creatorcontrib><creatorcontrib>Ka, Oumar</creatorcontrib><creatorcontrib>George, Christian</creatorcontrib><title>Photochemistry of mineral dust surface as a potential atmospheric renoxification process</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>The nitrate formation on dust particles is considered as a sink for atmospheric NOy (such as HNO3). However mineral dust is shown here to be an effective photocatalyst for transformation of nitrate anions into NO and NO2, without involving its photolysis. The photodecomposition of NO3− at the surface of synthetic mineral dust samples of SiO2, TiO2, mixed TiO2‐SiO2 and authentic sand doped with 6% NO3− was studied by means of a flow‐tube at 298 K with UV‐illumination in the 340–420 nm range at relative humidities between 5 and 80%. Both NO and NO2 are observed during irradiation of films composed of either mixed TiO2‐SiO2, pure TiO2 and authentic minerals from the Sahara. The relative humidity strongly affects the concentration of NOx released into the gas phase. The photoinduced nitrate conversion into NOx is discussed as being a potential renoxification process of the atmosphere.</description><subject>Anions</subject><subject>Atmospheric aerosols</subject><subject>Atmospheric sciences</subject><subject>Catalysis</subject><subject>Chemical Sciences</subject><subject>Dust</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Irradiation</subject><subject>Nitrates</subject><subject>Nitrogen dioxide</subject><subject>nitrogen oxides</subject><subject>Photochemistry</subject><subject>Photolysis</subject><subject>Relative humidity</subject><subject>Titanium dioxide</subject><subject>Troposphere</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp9kd2L1DAUxYMoOI6--QcEQUGwepPmq4_Lol2lfrAoii_hTjZlsnaaMWl15783Q5dBfPApIfd3zs3hEPKYwUsGvHnFAUzbQa2U4nfIijVCVAZA3yUrgKbcuVb3yYOcrwGghpqtyLdP2zhFt_W7kKd0oLGnuzD6hAO9mvNE85x6dJ5ipkj3cfLjFMoMp13M-61PwdHkx3gT-uBwCnGk-xSdz_khudfjkP2j23NNvrx5_fn8ouo-tm_Pz7oKpZKsuvLSABonpXNKCc9kz7VwIKRRqoQSzUYJpTZGKyP0pgEnhNfaOYa8F47Xa_J88d3iYPcp7DAdbMRgL846e3wDEKrmUv1ihX22sOWPP2efJ1tSOz8MOPo4Z8tBlK2iKeCTf8DrOKex5LCmjBtZgy7QiwVyKeacfH9az8Ae-7B_91Hwp7eemB0OfcLRhXzScFYbpUspa8IX7ncY_OG_nra97LiU4pisWkSlRX9zEmH6YYuplvbrh9a-f8ek-G4ubVv_AZ9ipiU</recordid><startdate>200903</startdate><enddate>200903</enddate><creator>Ndour, Marieme</creator><creator>Conchon, Pierre</creator><creator>D'Anna, Barbara</creator><creator>Ka, Oumar</creator><creator>George, Christian</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><general>John Wiley & Sons, Inc</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H8D</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>L7M</scope><scope>M2O</scope><scope>M2P</scope><scope>M7S</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0003-1578-7056</orcidid><orcidid>https://orcid.org/0000-0001-8915-4097</orcidid></search><sort><creationdate>200903</creationdate><title>Photochemistry of mineral dust surface as a potential atmospheric renoxification process</title><author>Ndour, Marieme ; Conchon, Pierre ; D'Anna, Barbara ; Ka, Oumar ; George, Christian</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a5651-de580a8c55cc664e15f274c04586610249b6466b876847b90c44e77cc1a2f4c23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Anions</topic><topic>Atmospheric aerosols</topic><topic>Atmospheric sciences</topic><topic>Catalysis</topic><topic>Chemical Sciences</topic><topic>Dust</topic><topic>Earth sciences</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Irradiation</topic><topic>Nitrates</topic><topic>Nitrogen dioxide</topic><topic>nitrogen oxides</topic><topic>Photochemistry</topic><topic>Photolysis</topic><topic>Relative humidity</topic><topic>Titanium dioxide</topic><topic>Troposphere</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ndour, Marieme</creatorcontrib><creatorcontrib>Conchon, Pierre</creatorcontrib><creatorcontrib>D'Anna, Barbara</creatorcontrib><creatorcontrib>Ka, Oumar</creatorcontrib><creatorcontrib>George, Christian</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>ProQuest Engineering Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Engineering Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Engineering Collection</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ndour, Marieme</au><au>Conchon, Pierre</au><au>D'Anna, Barbara</au><au>Ka, Oumar</au><au>George, Christian</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photochemistry of mineral dust surface as a potential atmospheric renoxification process</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2009-03</date><risdate>2009</risdate><volume>36</volume><issue>5</issue><epage>n/a</epage><issn>0094-8276</issn><eissn>1944-8007</eissn><coden>GPRLAJ</coden><abstract>The nitrate formation on dust particles is considered as a sink for atmospheric NOy (such as HNO3). However mineral dust is shown here to be an effective photocatalyst for transformation of nitrate anions into NO and NO2, without involving its photolysis. The photodecomposition of NO3− at the surface of synthetic mineral dust samples of SiO2, TiO2, mixed TiO2‐SiO2 and authentic sand doped with 6% NO3− was studied by means of a flow‐tube at 298 K with UV‐illumination in the 340–420 nm range at relative humidities between 5 and 80%. Both NO and NO2 are observed during irradiation of films composed of either mixed TiO2‐SiO2, pure TiO2 and authentic minerals from the Sahara. The relative humidity strongly affects the concentration of NOx released into the gas phase. The photoinduced nitrate conversion into NOx is discussed as being a potential renoxification process of the atmosphere.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2008GL036662</doi><tpages>4</tpages><orcidid>https://orcid.org/0000-0003-1578-7056</orcidid><orcidid>https://orcid.org/0000-0001-8915-4097</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Geophysical research letters, 2009-03, Vol.36 (5), p.n/a |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library All Journals |
| subjects | Anions Atmospheric aerosols Atmospheric sciences Catalysis Chemical Sciences Dust Earth sciences Earth, ocean, space Exact sciences and technology Irradiation Nitrates Nitrogen dioxide nitrogen oxides Photochemistry Photolysis Relative humidity Titanium dioxide Troposphere |
| title | Photochemistry of mineral dust surface as a potential atmospheric renoxification process |
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