<?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>S0188-49992016000400413</article-id>
<article-id pub-id-type="doi">10.20937/RICA.2016.32.04.05</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Obtención de un medio enriquecido para hacer más eficiente la biodisponibilidad de los hidrocarburos intemperizados en un suelo costero]]></article-title>
<article-title xml:lang="en"><![CDATA[Obtaining of an enriched medium to increasing the bioavailability of weathered hydrocarbons in a coastal soil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jiménez Hernández]]></surname>
<given-names><![CDATA[Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra Sánchez]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Innovación Aplicada en Tecnologías Competitivas, Asociación Civil  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<volume>32</volume>
<numero>4</numero>
<fpage>413</fpage>
<lpage>424</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992016000400413&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992016000400413&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992016000400413&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los hidrocarburos intemperizados presentan una composición formada principalmente por la fracción pesada del petróleo, los cuales son altamente persistentes. La complejidad química del suelo dificulta la biodegradación de los hidrocarburos. El objetivo de este trabajo fue incrementar la biodisponibilidad de hidrocarburos altamente persistentes, obteniendo las mejores condiciones nutrimentales para que los microorganismos nativos en un consorcio adaptado desarrollaran el máximo potencial de degradación en un suelo contaminado con hidrocarburos intemperizados, a través de un proceso de bioestimulación. Se utilizó un diseño de experimentos factorial fraccionado del tipo Plackett-Burman para encontrar la combinación de nutrientes específicos que aporten los requerimientos mínimos necesarios para que las bacterias hidrocarbonoclastas desarrollen sus procesos metabólicos de manera eficiente. La biodegradación de los hidrocarburos fue estimada con base en el contenido de hidrocarburos de fracción pesada (HFP)/kg suelo seco, producción de CO2/kg suelo seco, así como la alteración de algunas características fisicas y químicas como el pH, CE (µS/cm), porcentaje de humedad y porcentaje de materia orgánica. Este trabajo realiza una contribución al estudio de la biodisponibilidad de los hidrocarburos persistentes mediante el control de las condiciones nutrimentales en un proceso de bioestimulación a través de un diseño de experimentos. Por otro lado, la adición de un consorcio microbiano adaptado a concentraciones de 1 % de crudo Maya incrementó la degradación de los hidrocarburos intemperizados en el suelo costero hasta en un 97 %, expresados como HFP en un periodo de 28 días de degradación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The weathered hydrocarbons are mainly constituted of highly persistent heavy petroleum fractions. Thus, the soil chemical complexity delays the hydrocarbon biodegradation. The objective of this study was to increase the bioavailability of highly persistent compounds by obtaining the greatest nutritional conditions for indigenous microorganisms. A consortium was previously adapted in order to achieve the full potential of degradation through the biostimulation process which was carried out by the Plackett-Burman analytic method experiments. These experiments conducted to a specific combination of nutrients, which provided the minimum requirements for the hydrocarbonoclastic bacteria to efficiently improve their metabolic processes. The biodegradation of hydrocarbons were estimated based on the heavy oil/kg dry soil, CO2 production/kg dry soil, as well as the alteration of certain physicochemical characteristics, such as pH, EC (µS/cm), moisture and organic matter percentage. In conclusion, these analyses provide a contribution to the study of bioavailability of weathered hydrocarbons by controlling conditions in a nutrient biostimulation process and through the design of experiments. Likewise, a microbial consortium adapted to a 1 % concentration of Mayan crude, resulted in an up to 97 % increase in hydrocarbon degradation in the coastal weathered soil, which were expressed as a heavy fraction of hydrocarbons in a period of 28 days of degradation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[petróleo crudo]]></kwd>
<kwd lng="es"><![CDATA[intemperismo]]></kwd>
<kwd lng="es"><![CDATA[recalcitrancia]]></kwd>
<kwd lng="es"><![CDATA[bioestimulación]]></kwd>
<kwd lng="en"><![CDATA[crude oil]]></kwd>
<kwd lng="en"><![CDATA[weathering]]></kwd>
<kwd lng="en"><![CDATA[recalcitrance]]></kwd>
<kwd lng="en"><![CDATA[biostimulation]]></kwd>
</kwd-group>
</article-meta>
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