<?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>S0188-49992018000100127</article-id>
<article-id pub-id-type="doi">10.20937/rica.2018.34.01.11</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[RESPIRACIÓN POTENCIAL DURANTE LA BIOESTIMULACIÓN DE UN SUELO CONTAMINADO CON HIDROCARBUROS AROMÁTICOS POLICÍCLICOS]]></article-title>
<article-title xml:lang="en"><![CDATA[POTENTIAL RESPIRATION DURING THE BIOSTIMULATION OF A SOIL CONTAMINATED WITH AROMATIC POLICYCLIC HYDROCARBONS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torri]]></surname>
<given-names><![CDATA[Silvana Irene]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[Marisol Natalia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alberti]]></surname>
<given-names><![CDATA[Cecilia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Buenos Aires Facultad de Agronomía Departamento de Recursos Naturales y Ambiente]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Buenos Aires Facultad de Ciencias Exactas y Naturales ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Tecnología Industrial-Química  ]]></institution>
<addr-line><![CDATA[Buenos Aires ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>34</volume>
<numero>1</numero>
<fpage>127</fpage>
<lpage>136</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992018000100127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992018000100127&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992018000100127&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los hidrocarburos aromáticos policíclicos (HAP) son compuestos orgánicos que pueden persistir en el ambiente debido a su hidrofobicidad y a su baja solubilidad en agua, lo que representa un riesgo de ingresar a la cadena trófica. Ciertos microorganismos edáficos son potencialmente capaces de degradarlos. La incorporación de nutrientes puede acelerar la tasa de biodegradación si las condiciones del suelo son favorables. Los objetivos del presente trabajo fueron estudiar el efecto disipador de los microorganismos edáficos nativos en un suelo contaminado artificialmente con dos HAP (antraceno o fenantreno), además de evaluar el efecto en la disponibilidad de macro y micro nutrientes. Adicionalmente, se estudió la influencia de la estructura química del contaminante en el proceso de biorremediación. Se realizó un ensayo de incubación con un suelo hapludol típico contaminado artificialmente con antraceno o con fenantreno. La actividad microbiana se estimó en forma indirecta través de la producción de CO2. La presencia de antraceno o de fenantreno no afectó la actividad microbiana edáfica inicial. Se observó un incremento en la emisión total de CO2 en los suelos contaminados comparado con los suelos sin contaminar debido a la degradación de los contaminantes. Al término de 60 días se analizaron los suelos por cromatografía gaseosa con detector de espectrometría de masas. Según los tratamientos, la concentración de antraceno y de fenantreno disminuyó un 75 - 77 % o un 89 - 91 %, respectivamente. Lo que indica la capacidad de los microorganismos nativos edáficos para degradar rápidamente ambos contaminantes. La disipación del fenantreno fue mayor que la correspondiente al antraceno, lo que fue atribuido a su diferente biodisponibilidad en el suelo. No se observaron diferencias significativas entre tratamientos con y sin nutrientes, por lo que se concluye que la disponibilidad de éstos no fue limitante para la actividad catabólica de los microorganismos edáficos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Polycyclic aromatic hydrocarbons (PAHs) are organic compounds that may persist in the environment due to their hydrophobicity and insolubility in water, posing the risk of entering the food chain. Some soil microorganisms are potentially capable of degrading PAHs. The addition of nutrients may accelerate the rate of biodegradation if soil conditions are favorable. The objectives were to study the degradation capacity of native soil microorganisms to degrade selected PAHs in an artificially contaminated soil, and to evaluate the effect of nutrient availability. The influence of the chemical structure of the contaminant was also studied. An incubation assay was performed, using a typic hapludoll soil artificially contaminated with anthracene or phenanthrene. Microbial activity was indirectly estimated through the production of CO2. Soil contamination with anthracene or phenanthrene did not affect the initial soil microbial activity. The total emission of CO2 increased in contaminated soils compared to the pristine ones, due to the degradation of contaminants. At 60 days, soil samples were analyzed by gas chromatography-mass spectrometry. The removal of anthracene and phenanthrene from the soil was different, and it was related to bioavailability. Anthracene and phenanthrene concentration decreased 75 - 77 % or 89 - 91 %, respectively, indicating the ability of native soil microorganisms to rapidly degrade both pollutants. No significant differences were observed between treatments with and without nutrients, concluding that nutrient availability was not a limiting factor for the catabolic activity of soil microorganisms.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biodegradación]]></kwd>
<kwd lng="es"><![CDATA[antraceno]]></kwd>
<kwd lng="es"><![CDATA[fenantreno]]></kwd>
<kwd lng="es"><![CDATA[microorganismos]]></kwd>
<kwd lng="es"><![CDATA[suelos]]></kwd>
<kwd lng="es"><![CDATA[HAP]]></kwd>
<kwd lng="en"><![CDATA[biodegradation]]></kwd>
<kwd lng="en"><![CDATA[anthracene]]></kwd>
<kwd lng="en"><![CDATA[phenanthrene]]></kwd>
<kwd lng="en"><![CDATA[miroorganisms]]></kwd>
<kwd lng="en"><![CDATA[soil]]></kwd>
<kwd lng="en"><![CDATA[PAHs]]></kwd>
</kwd-group>
</article-meta>
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