<?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>S0188-49992020000200443</article-id>
<article-id pub-id-type="doi">10.20937/rica.53539</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[REMOVAL OF REACTIVE RED 120 IN AQUEOUS SOLUTION USING Mg-HYDROTALCITES AS ADSORBENTS SOLIDS: KINETICS AND ISOTHERMS]]></article-title>
<article-title xml:lang="es"><![CDATA[REMOCIÓN DE ROJO REACTIVO 120 EN SOLUCIÓN ACUOSA USANDO HIDROTALCITAS DE Mg COMO SÓLIDOS ADSORBENTES: CINÉTICA E ISOTERMAS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dávila]]></surname>
<given-names><![CDATA[Ivone Jurado]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosset]]></surname>
<given-names><![CDATA[Morgana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopez]]></surname>
<given-names><![CDATA[Oscar Perez]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Féris]]></surname>
<given-names><![CDATA[Liliana Amaral]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Rio Grande do Sul Department of Chemical Engineering ]]></institution>
<addr-line><![CDATA[Porto Alegre - RS ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>2</numero>
<fpage>443</fpage>
<lpage>453</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000200443&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000200443&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000200443&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Reactive red 120 (RR120) is a widely used dye in the textile industry but its release in aqueous wastewater is a serious problem due to its toxicity and low biodegradability. The aim of this work was to evaluate the effect of the trivalent cation of magnesium-based materials type hydrotalcite as adsorbents applied to RR120 dye removal in aqueous solution. The samples were synthesized by continuous coprecipitation and were characterized by surface area measurements, X-ray diffraction and temperature-programmed desorption of CO2. Dye adsorption tests were carried out using different adsorbent dosages and contact time. The kinetic adsorption was studied for the pseudo-first and pseudo-second order models. The equilibrium adsorption data were fitted to the Langmuir, Freundlich and Redlich-Peterson isotherm models. The most suitable adsorption conditions were found at a residence time of 60 min and solid dosage of 2.5 g/L for HDL-MgFe, 2 g/L for HDL-MgAl and HC-Mg. The results showed that pseudo-second order model, as well as the Langmuir and Redlich-Peterson models best described the removal process. The Al containing compound presented the best results due to a better interaction between strength and number of basic sites.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El rojo reactivo 120 es un colorante ampliamente utilizado en la industria textil, pero su liberación en aguas residuales es un problema grave debido a su toxicidad y baja biodegradabilidad. El objetivo de este trabajo fue evaluar el efecto del catión trivalente de materiales tipo hidrotalcita a base de magnesio como sólidos adsorbentes aplicados a la eliminación del colorante rojo reactivo 120 en solución acuosa. Las muestras se sintetizaron mediante coprecipitación continua y se caracterizaron por medidas de área superficial, difracción de rayos X y desadsorción de CO2 programada por temperatura. Las pruebas de adsorción de colorantes se llevaron a cabo utilizando diferentes concentraciones de adsorbente y tiempo de contacto. La cinética de adsorción se estudió para los modelos de seudoprimer y seudosegundo orden. Los datos de adsorción de equilibrio se ajustaron a los modelos de isotermas de Langmuir, Freundlich y Redlich-Peterson. Las condiciones de adsorción más adecuadas se encontraron en un tiempo de residencia de 60 min y una concentración del sólido de 2.5 g/L para HDL-MgFe, y 2 g/L para HDL-MgAl y HC-Mg. Los resultados mostraron que el modelo de seudosegundo orden y de Langmuir y Redlich-Peterson describían mejor el proceso de eliminación del colorante. Además, el compuesto que contienía Al presentó los mejores resultados debido a una mejor interacción entre la fuerza y el número de sitios básicos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[adsorption]]></kwd>
<kwd lng="en"><![CDATA[dye]]></kwd>
<kwd lng="en"><![CDATA[water]]></kwd>
<kwd lng="en"><![CDATA[materials]]></kwd>
<kwd lng="es"><![CDATA[adsorción]]></kwd>
<kwd lng="es"><![CDATA[colorante]]></kwd>
<kwd lng="es"><![CDATA[agua]]></kwd>
<kwd lng="es"><![CDATA[materiales]]></kwd>
</kwd-group>
</article-meta>
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