<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992017000400605</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.04.05</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[USO DE UN REACTOR DE PLACA PLANA (TiO 2 /VIDRIO) PARA LA DEGRADACIÓN DE 2,5-DICLOROFENOL POR FOTOCATÁLISIS SOLAR]]></article-title>
<article-title xml:lang="en"><![CDATA[USE OF A FLAT PLATE REACTOR (TiO 2 /GLASS) FOR 2,5-DICHLOROPHENOL DEGRADATION BY SOLAR PHOTOCATALYSIS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morones Esquivel]]></surname>
<given-names><![CDATA[Miriam Mirelle]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pantoja Espinoza]]></surname>
<given-names><![CDATA[Juan Candelario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Proal Nájera]]></surname>
<given-names><![CDATA[José Bernardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cháirez Hernández]]></surname>
<given-names><![CDATA[Isaías]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gurrola Reyes]]></surname>
<given-names><![CDATA[J. Natividad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila Santos]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Tecnológica de Rodeo  ]]></institution>
<addr-line><![CDATA[Durango ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>4</numero>
<fpage>605</fpage>
<lpage>616</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000400605&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000400605&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000400605&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La degradación de compuestos orgánicos no biodegradables presentes en aguas residuales es un punto central de la fotocatálisis solar debido a su alta eficiencia y aceptables costos de operación. Se estudió la degradación de 2,5-diclorofenol (2,5-DCF) en solución acuosa con concentración inicial variable (C0 &#8804; 98 mg/L), por fotólisis y fotocatálisis solar con un reactor de placa plana (1 m2) y vidrio impregnado con TiO2 sintetizado por el método sol-gel. Se establecieron dos variables de respuesta, la demanda química de oxígeno y la concentración de 2,5-DCF determinada a 280 nm, por tres factores: ángulo de inclinación (20º y 26º), flujo (355 L/h y 407 L/h) y dos procesos (fotólisis y fotocatálisis). Lo anterior en condiciones de alta (&#295;&#651;prom = 847.4 W/m2) y baja intensidad (&#295;&#651;prom = 453.6 W/m2) de radiación solar, para lo cual se recirculó la solución acuosa sobre la placa de vidrio durante 60 min, bajo régimen laminar y con muestras cada 5 min. Se determinaron las constantes de velocidad K1 (min-1) y K2 (mol/L)-1 de orden primero y cero de reacción, respectivamente. Se consideraron elementos de la dinámica del reactor en la evaluación de la cinética química de reacciones fotocatalíticas. Se alcanzaron porcentajes de degradación de 2,5-DCF superiores al 98 % por fotocatálisis solar.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The interest in solar photocatalysis degradation of non-biodegradable organic compounds in wastewater has raised due to its high efficiency and acceptable operation costs. The degradation of an aqueous 2,5-Dichlorophenol (2,5-DCP) solution with variable initial concentration (C0 &#8804; 98 mg/L) was performed by photolysis and solar photocatalysis, using a flat glass plate (1 m2) impregnated with TiO2 synthetized by the sol-gel method, on a solar photo reactor. Two response variables (chemical oxygen demand and the 2,5-DCP concentration determined at 280 nm) were established by using three factors: slope angle (20º and 26º), flow rate (355 and 407 L/h) and two processes (photolysis and photocatalysis). The latter at high (&#295;&#651;prom = 847.4 W/m2) and low (&#295;&#651;prom = 453.6 W/m2) solar radiation intensity. The aqueous 2,5-DCP solution was recirculated over the glass plate for 60 min at laminar flow rate, and samples of the aqueous solution were taken every 5 min to determine the variables. Rate constants K1 (min-1) and K2 (mol/L)-1 of first and zero order reaction, respectively, were determined by considering elements originating on reactor dynamics in the evaluation of photocatalytic oxidation kinetics. Degradation percentages of 2,5-DCP over 98 % were achieved by solar photocatalysis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[fotocatálisis heterogénea]]></kwd>
<kwd lng="es"><![CDATA[método sol-gel]]></kwd>
<kwd lng="es"><![CDATA[dinámica del reactor]]></kwd>
<kwd lng="en"><![CDATA[heterogeneous photocatalysis]]></kwd>
<kwd lng="en"><![CDATA[sol-gel method]]></kwd>
<kwd lng="en"><![CDATA[reactor dynamics]]></kwd>
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</article-meta>
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