<?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>S0188-49992017000100141</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.01.13</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ARCILLAS ESMECTÍTICAS DE LA REGIÓN NORPATAGÓNICA ARGENTINA COMO BARRERAS HIDRÁULICAS DE RELLENOS SANITARIOS Y AGENTES DE RETENCIÓN DE METALES PESADOS]]></article-title>
<article-title xml:lang="en"><![CDATA[SMECTITIC CLAYS FROM NORTHPATAGONIC REGION OF ARGENTINA AS HYDRAULIC BARRIERS OF LANDFILLS AND HEAVY METALS RETENTION AGENTS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Musso]]></surname>
<given-names><![CDATA[Telma Belén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pettinari]]></surname>
<given-names><![CDATA[Gisela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parolo]]></surname>
<given-names><![CDATA[María Eugenia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mesquín]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional del Comahue Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas y Facultad de Ingeniería Consejo Nacional de Investigaciones Científicas y Técnicas]]></institution>
<addr-line><![CDATA[Neuquén ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional del Comahue Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas ]]></institution>
<addr-line><![CDATA[Neuquén ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional del Comahue Instituto de Investigación en Toxicología Ambiental y Agrobiotecnología, CITAAC (CONICET-UNCo), Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Neuquén ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional del Comahue Facultad de Ingeniería ]]></institution>
<addr-line><![CDATA[Neuquén ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2017</year>
</pub-date>
<volume>33</volume>
<numero>1</numero>
<fpage>141</fpage>
<lpage>152</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000100141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000100141&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000100141&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La principal preocupación en los rellenos sanitarios es la posible migración de lixiviado y eventual contaminación del agua subterránea. Esta migración se controla interponiendo barreras constituidas por capas de arcilla compactadas que poseen baja conductividad hidráulica y alta capacidad de retención de contaminantes. El objetivo de este estudio fue evaluar la conductividad hidráulica y la capacidad de retención de metales pesados de dos arcillas esmectíticas con el fin de determinar sus aptitudes como barreras hidráulicas y geoquímicas de rellenos sanitarios. Se realizaron ensayos de conductividad hidráulica de mezclas arcilla-arena con agua destilada y un lixiviado real de residuos sólidos urbanos como fluidos permeantes. Adicionalmente, se realizaron ensayos de adsorción en lotes a partir de soluciones monometálicas de Cu(II), Zn(II), Ni(II) y Cd(II). La conductividad hidráulica determinada con lixiviado fue entre uno y tres órdenes de magnitud mayor en relación con el agua, debido principalmente a la elevada salinidad de dicho lixiviado, lo que contribuye a generar un estado mas floculado de las arcillas y a la desaparición de fases minerales solubles. Los datos de adsorción de los metales estudiados sobre las arcillas se ajustaron a la isoterma de Langmuir. La capacidad de adsorción de los metales analizados fue en el orden: Zn(II) &gt; Cu(II) &gt; Ni(II) &gt; Cd(II) para la bentonita CATAE y Zn(II) &gt; Ni(II) &gt; Cu(II) &gt; Cd(II) para la fangolita NTOL. La capacidad de adsorción de Cu(II) y Zn(II) fue superior a la capacidad de intercambio catiónico de las arcillas, mientras que para Cd(II) y Ni(II), la cantidad retenida no supera este valor. Por otro lado, la conductividad hidráulica de las mezclas arcilla-arena fue menor a 1 x 10-9 m/s. En función de estos resultados, las arcillas analizadas muestran una aptitud adecuada para ser usadas como barreras hidráulicas y geoquímicas de rellenos sanitarios de acuerdo con lo estipulado en la legislación internacional para barreras arcillosas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Groundwater contamination through leachates migration in landfills is one of the main concerns in this kind of disposal sites. To control this migration, compacted clay liners of low hydraulic conductivity and high retention capacity are widely used to isolate urban waste leachate. The aim of this work was to evaluate the hydraulic conductivity and heavy metal adsorption capacity of two smectitic clays to determine their hydraulic and geochemical properties to be used as clay barriers in landfills. Hydraulic conductivity tests of sand-clay mixtures permeated with distilled water and a real leachate were performed. Adsorption of Cu(II), Zn(II), Ni(II) and Cd(II) from monometal solutions on clay fractions was evaluated through batch adsorption tests. Hydraulic conductivity of the specimens permeated with a real leachate was of 1 to 3 orders of magnitude higher than the ones permeated with water. This could be attributed to the highly salinity of the leachate which contributed to a more flocculated state of the clays and the dissolution of soluble mineral phases. The heavy metal adsorption data were fitted with Langmuir model. The adsorption capacities of the analyzed metals were in the following order: Zn(II) &gt; Cu(II) &gt; Ni(II) &gt; Cd(II) for CATAE bentonite and Zn(II) &gt; Ni(II) &gt; Cu(II) &gt; Cd(II) for NTOL mudstone. The adsorption capacity of Cu(II) and Zn(II) was higher than the cation exchange capacity (CEC) of the analyzed clays, whereas for Cd(II) and Ni(II), the retained quantity is lower than the CEC. On the other hand, the hydraulic conductivity of the sand-clay mixtures was lower than 1 x 10-9 m/s. These results indicate the suitability of the tested clays to be used as hydraulic and geochemical barriers in landfills according to the international legislation requirements for clay liners.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[conductividad hidráulica]]></kwd>
<kwd lng="es"><![CDATA[adsorción]]></kwd>
<kwd lng="es"><![CDATA[lixiviados]]></kwd>
<kwd lng="es"><![CDATA[residuos sólidos urbanos]]></kwd>
<kwd lng="en"><![CDATA[hydraulic conductivity]]></kwd>
<kwd lng="en"><![CDATA[adsorption]]></kwd>
<kwd lng="en"><![CDATA[leachates]]></kwd>
<kwd lng="en"><![CDATA[urban solid waste]]></kwd>
</kwd-group>
</article-meta>
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