<?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>S0188-49992017000200247</article-id>
<article-id pub-id-type="doi">10.20937/rica.2017.33.02.06</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[BIODEGRADACIÓN AEROBIA DE FRACCIONES DE HIDROCARBUROS PROVENIENTES DE LA ACTIVIDAD PETROLERA EN UN SUELO DE LA REGIÓN PATAGONIA NORTE, ARGENTINA]]></article-title>
<article-title xml:lang="en"><![CDATA[AEROBIC BIODEGRADATION OF HYDROCARBONS FROM OIL ACTIVITY IN ARGENTINE NORTH PATAGONIAN SOILS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alvaro]]></surname>
<given-names><![CDATA[Cecilia E. Silvana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arocena]]></surname>
<given-names><![CDATA[Lucas Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Miguel Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nudelman]]></surname>
<given-names><![CDATA[Norma Ethel S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional del Comahue Facultad de Ingeniería-Instituto de Investigaciones y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas Laboratorio de Recuperación de Suelos Regionales]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional del Comahue Facultad de Ingeniería Laboratorio de Recuperación de Suelos Regionales]]></institution>
<addr-line><![CDATA[Buenos Aires Argentina]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional del Comahue Facultad de Tecnología y Ciencia de los Alimentos ]]></institution>
<addr-line><![CDATA[Río Negro ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</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>2</numero>
<fpage>247</fpage>
<lpage>257</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992017000200247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992017000200247&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992017000200247&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las técnicas recientes de evaluación de sitios contaminados con hidrocarburos se fundamentan en la metodología del análisis de riesgo. El efecto sobre la salud y el ecosistema que producen agentes químicos presentes en un ambiente contaminado es estimado como la sumatoria de riesgos individuales, siendo la concentración de hidrocarburos un dato relevante. La biorremediación es una tecnología sustentable que acelera la degradación del petróleo en suelos contaminados y posee una relación costo beneficio favorable frente a otros métodos de remediación. El presente trabajo, realizado a escala de laboratorio, estudia la velocidad de degradación de distintas fracciones del petróleo mediante la incorporación de biosólidos (lodos cloacales) a un suelo contaminado de la Norpatagonia Argentina. Se determinó la concentración de hidrocarburos totales y el recuento de microorganismos presentes en el suelo al iniciar y finalizar el proceso de biorremediación. La degradación de las fracciones de hidrocarburos se analizó a intervalos regulares del proceso. Los resultados obtenidos mostraron una marcada disminución en la concentración de alcanos e hidrocarburos aromáticos de menor peso molecular a los 14 días de tratamiento. Los hidrocarburos de fracción pesada, resistentes a la biodegradación, mostraron reducciones significativas durante todo el proceso; su baja volatilidad y escasa migración por lixiviación indicarían que la degradación se debió principalmente al metabolismo de los microorganismos nativos presentes en suelos norpatagónicos. La comparación con el tratamiento convencional indica que la adición de biosólidos mejoró la remediación y que la biodiversidad de microorganismos presentes en el suelo es un factor importante para lograr una degradación significativa de fracciones del petróleo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Recent techniques for assessing hydrocarbon contaminated sites are mainly based on risk analysis methodology. The effects of chemicals present in contaminated sites on the human health and the ecosystem are usually estimated as the addition of individual risks. In this sense, the hydrocarbon concentration is a relevant data. Bioremediation is a sustainable technology that accelerates the full or partial degradation of petroleum in contaminated soils and it shows a suitable cost-benefit ratio over other remediation methods. This work describes a laboratory scale study of the degradation rate for petroleum fractions by the incorporation of &#8220;biosolids&#8221; (sewage sludge) in an oil contaminated Patagonian soil. The determination of the total hydrocarbon concentration and the count of microorganisms in soil were performed both at the beginning and the end of the bioremediation process. The hydrocarbon degradation was analyzed at regular intervals during the study. The observed results showed that alkanes and lower molecular weight aromatic hydrocarbon concentrations were negligible after 14 days of treatment. The heavy hydrocarbon fraction, considered recalcitrant to biodegradation, was also significantly reduced during the biodegradation process. Since heavy hydrocarbons have low volatility and scarse migration by leaching, the observed decrease indicates that heavy hydrocarbon elimination could be mainly due to the native microorganism activity in the north Patagonian soils. Comparison with conventional treatment indicates that addition of &#8220;biosolids&#8221; enhances hydrocarbon remediation and that the biodiversity of microorganisms in soils is an important factor in achieving significant petroleum degradation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biorremediación]]></kwd>
<kwd lng="es"><![CDATA[petróleo]]></kwd>
<kwd lng="es"><![CDATA[explotación]]></kwd>
<kwd lng="es"><![CDATA[biosólidos]]></kwd>
<kwd lng="es"><![CDATA[suelos norpatagónicos]]></kwd>
<kwd lng="es"><![CDATA[microorganismos nativos]]></kwd>
<kwd lng="en"><![CDATA[bioremediation]]></kwd>
<kwd lng="en"><![CDATA[petroleum exploitation]]></kwd>
<kwd lng="en"><![CDATA[biosolids]]></kwd>
<kwd lng="en"><![CDATA[north Patagonian soils]]></kwd>
<kwd lng="en"><![CDATA[native microorganisms]]></kwd>
</kwd-group>
</article-meta>
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