Pyrylium salt-photosensitised degradation of phenolic contaminants present in olive oil wastewaters with solar light
Identifieur interne : 000614 ( Main/Exploration ); précédent : 000613; suivant : 000615Pyrylium salt-photosensitised degradation of phenolic contaminants present in olive oil wastewaters with solar light
Auteurs : Miguel A. Miranda [Espagne] ; Francisco Galindo [Espagne] ; Ana M. Amat [Espagne] ; Antonio Arques [Espagne]Source :
- Applied Catalysis B: Environmental [ 0926-3373 ] ; 2000.
Descripteurs français
- Wicri :
- topic : Huile d'olive.
English descriptors
- KwdEn :
Abstract
Solar light photodegradation, catalysed by a pyrylium salt, of seven benzoic acids present in olive oil mill, has been studied. Significant percentages of photodegradation (20–40%) have been achieved after 6h of solar exposure for six of the acids, even though they were expected to be difficult to oxidise, due to the presence of an electron-withdrawing carboxylic acid group directly attached to the aromatic ring. Quenching constants for the electron-transfer process between the substrate and the excited catalyst were calculated by means of fluorescence measurements for syringic acid (66×109M−1s−1), gallic acid (51×109M−1s−1), veratric acid (51×109M−1s−1), vanillic acid (48×109M−1s−1), protocatechuic acid (37×109M−1s−1) and p-hydroxybenzoic acid (15×109M−1s−1); no quenching was found for benzoic acid. These photophysical measurements are in good correlation with the yields obtained in the pyrylium salt photocatalysed degradation of those phenolic acids.
Url:
DOI: 10.1016/S0926-3373(00)00259-9
Affiliations:
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Amat</name></author><author><name sortKey="Arques, Antonio" sort="Arques, Antonio" uniqKey="Arques A" first="Antonio" last="Arques">Antonio Arques</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:503439B34189DFCC40DE4F04332B0C3575DC29F8</idno><date when="2001" year="2001">2001</date><idno type="doi">10.1016/S0926-3373(00)00259-9</idno><idno type="url">https://api.istex.fr/document/503439B34189DFCC40DE4F04332B0C3575DC29F8/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000520</idno><idno type="wicri:Area/Istex/Curation">000451</idno><idno type="wicri:Area/Istex/Checkpoint">000579</idno><idno type="wicri:doubleKey">0926-3373:2001:Miranda M:pyrylium:salt:photosensitised</idno><idno type="wicri:Area/Main/Merge">000644</idno><idno type="wicri:Area/Main/Curation">000638</idno><idno type="wicri:Area/Main/Exploration">000614</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Pyrylium salt-photosensitised degradation of phenolic contaminants present in olive oil wastewaters with solar light</title><author><name sortKey="Miranda, Miguel A" sort="Miranda, Miguel A" uniqKey="Miranda M" first="Miguel A." last="Miranda">Miguel A. Miranda</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Quı́mica e Instituto de Tecnologı́a Quı́mica, UPV-CSIC, Universidad Politécnica de Valencia, Apartado 22012, E-46071 Valencia</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation><affiliation><wicri:noCountry code="no comma">Corresponding author. Tel.: +34-96-387-7343; fax: +34-96-387-7349</wicri:noCountry></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Espagne</country></affiliation></author><author><name sortKey="Galindo, Francisco" sort="Galindo, Francisco" uniqKey="Galindo F" first="Francisco" last="Galindo">Francisco Galindo</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Quı́mica e Instituto de Tecnologı́a Quı́mica, UPV-CSIC, Universidad Politécnica de Valencia, Apartado 22012, E-46071 Valencia</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author><author><name sortKey="Amat, Ana M" sort="Amat, Ana M" uniqKey="Amat A" first="Ana M." last="Amat">Ana M. Amat</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Ingenierı́a Textil y Papelera, EPSA-UPV, Universidad Politécnica de Valencia, Paseo Viaducto 1, E-03801 Alcoy Alicante</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation><affiliation><wicri:noCountry code="no comma">1 Co-corresponding author.</wicri:noCountry></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Espagne</country></affiliation></author><author><name sortKey="Arques, Antonio" sort="Arques, Antonio" uniqKey="Arques A" first="Antonio" last="Arques">Antonio Arques</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Ingenierı́a Textil y Papelera, EPSA-UPV, Universidad Politécnica de Valencia, Paseo Viaducto 1, E-03801 Alcoy Alicante</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté valencienne</region></placeName></affiliation></author></analytic><monogr></monogr><series><title level="j">Applied Catalysis B: Environmental</title><title level="j" type="abbrev">APCATB</title><idno type="ISSN">0926-3373</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000">2000</date><biblScope unit="volume">30</biblScope><biblScope unit="issue">3–4</biblScope><biblScope unit="page" from="437">437</biblScope><biblScope unit="page" to="444">444</biblScope></imprint><idno type="ISSN">0926-3373</idno></series><idno type="istex">503439B34189DFCC40DE4F04332B0C3575DC29F8</idno><idno type="DOI">10.1016/S0926-3373(00)00259-9</idno><idno type="PII">S0926-3373(00)00259-9</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0926-3373</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>2,4,6-Triphenylpyrylium</term><term>Benzoic acids</term><term>Fluorescence</term><term>Olive oil</term><term>Oxidation</term><term>Photocatalysis</term><term>Photodegradation</term><term>Solar light</term><term>Wastewaters</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Huile d'olive</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Solar light photodegradation, catalysed by a pyrylium salt, of seven benzoic acids present in olive oil mill, has been studied. Significant percentages of photodegradation (20–40%) have been achieved after 6h of solar exposure for six of the acids, even though they were expected to be difficult to oxidise, due to the presence of an electron-withdrawing carboxylic acid group directly attached to the aromatic ring. Quenching constants for the electron-transfer process between the substrate and the excited catalyst were calculated by means of fluorescence measurements for syringic acid (66×109M−1s−1), gallic acid (51×109M−1s−1), veratric acid (51×109M−1s−1), vanillic acid (48×109M−1s−1), protocatechuic acid (37×109M−1s−1) and p-hydroxybenzoic acid (15×109M−1s−1); no quenching was found for benzoic acid. These photophysical measurements are in good correlation with the yields obtained in the pyrylium salt photocatalysed degradation of those phenolic acids.</div></front></TEI><affiliations><list><country><li>Espagne</li></country><region><li>Communauté valencienne</li></region></list><tree><country name="Espagne"><region name="Communauté valencienne"><name sortKey="Miranda, Miguel A" sort="Miranda, Miguel A" uniqKey="Miranda M" first="Miguel A." last="Miranda">Miguel A. Miranda</name></region><name sortKey="Amat, Ana M" sort="Amat, Ana M" uniqKey="Amat A" first="Ana M." last="Amat">Ana M. Amat</name><name sortKey="Amat, Ana M" sort="Amat, Ana M" uniqKey="Amat A" first="Ana M." last="Amat">Ana M. Amat</name><name sortKey="Arques, Antonio" sort="Arques, Antonio" uniqKey="Arques A" first="Antonio" last="Arques">Antonio Arques</name><name sortKey="Galindo, Francisco" sort="Galindo, Francisco" uniqKey="Galindo F" first="Francisco" last="Galindo">Francisco Galindo</name><name sortKey="Miranda, Miguel A" sort="Miranda, Miguel A" uniqKey="Miranda M" first="Miguel A." last="Miranda">Miguel A. Miranda</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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