<?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>S0188-49992019000100101</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.01.07</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[ENVIROMENTAL RISK ASSESMENT OF HEAVY METALS IN SURFACE SEDIMENTS OF THE GULF OF CARIACO]]></article-title>
<article-title xml:lang="es"><![CDATA[EVALUACIÓN DEL RIESGO AMBIENTAL DE METALES PESADOS EN LOS SEDIMENTOS SUPERFICIALES DEL SACO DEL GOLFO DE CARIACO]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fuentes-Hernández]]></surname>
<given-names><![CDATA[María Valentina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanguinetti-Gamboa]]></surname>
<given-names><![CDATA[Octavio Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas De Astudillo]]></surname>
<given-names><![CDATA[Luisa Lucina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Oriente Núcleo de Sucre Escuela de Ciencias]]></institution>
<addr-line><![CDATA[Cumaná Estado Sucre]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Politécnica Antonio José de Sucre  ]]></institution>
<addr-line><![CDATA[Ciudad Guayana Estado Bolívar]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2019</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>101</fpage>
<lpage>114</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000100101&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The aim of this study was to assess the potential risk of heavy metals to the ecosystem of the gulf of Cariaco. To this end, we determined the concentration of heavy metals and the contamination and environmental risk indices in sediments. In addition, a survival test with Artemia salina was applied. The total metal concentrations (µg/g) were: Cu (29-91, X&#773; = 58), Cd (1.9-4.9, X&#773; = 3.7), Cr (4-36, X&#773; = 21), Ni (10-33, X&#773; =21), Pb (3-9, X&#773; = 6) and Zn (32-112, X&#773; = 75). Metal concentrations were lower than the sediment quality standards (SQS). In the bioavailable fraction of sediments, the concentration of metals was innocuous. The enrichment factor (EF) showed that Zn, Cd and Cu were enriched by anthropogenic sources. The geoaccumulation index (Igeo) revealed high contamination by Cd. The risk assessment code (RAC) showed that the concentrations of Cd and Cr were innocuous, Cu and Ni were between harmless and scarecely dangerous, and Zn and Mn were moderately hazardous. Finally, Cd, Cu and Ni were the only metals with concentrations ranging between effects range low (ERL) and median (ERM) and the combined toxic potential of the metals was low (21 %). Despite this, no specimen of Artemia salina had negative effects on sedimentary extracts. Therefore, the ecosystem can be considered healthy, which is favored by very fine and anoxic sediments that lead to accumulation of metals.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de esta investigación fue evaluar la potencialidad de algunos metales pesados para provocar daños al ecosistema del golfo de Cariaco. Para ello se determinaron las concentraciones de los metales en los sedimentos y los índices de contaminación y riesgo ambiental. Además, se realizó una prueba de supervivencia con Artemia salina. Las concentraciones totales (µg/g) fueron: Cu (29-91, X&#773; = 58), Cd (1.9-4.9, X&#773; = 3.7), Cr (4-36, X&#773; = 21), Ni (10-33, X&#773; = 21), Pb (3-9, X&#773; = 6) y Zn (32-112, X&#773; = 75). Todas las concentraciones de metales fueron menores que los estándares de calidad de sedimentos marinos (SQS). En la fracción biodisponible, los metales mostraron concentraciones no tóxicas. El factor de enriquecimiento (FE) reveló incrementos por fuentes antrópicas en Zn, Cd y Cu. El índice de geoacumulación (Igeo) indicó contaminación por Cd. El código de riesgo ambiental (CRA) mostró que las concentraciones de Cd y Pb fueron inocuas; las de Cr, Cu y Ni entre inocuas y poco peligrosas, y las de Zn y Mn medianamente peligrosas. Finalmente, las concentraciones de Cd, Cu y Ni se ubicaron entre el intervalo de efectos bajos (ERL) y medios (ERM), y la potencialidad tóxica combinada (m-ERM-Q) fue baja (21 %). A pesar de esto, ningún ejemplar de Artemia salina tuvo efecto negativo en los extractos sedimentarios. Por tanto, el ecosistema se considera saludable, condición favorecida por sedimentos muy finos y anóxicos que benefician la retención de metales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[enrichment factor]]></kwd>
<kwd lng="en"><![CDATA[geoaccumulation index]]></kwd>
<kwd lng="en"><![CDATA[toxic probability]]></kwd>
<kwd lng="es"><![CDATA[factor de enriquecimiento]]></kwd>
<kwd lng="es"><![CDATA[índice de geoacumulación]]></kwd>
<kwd lng="es"><![CDATA[probabilidad tóxica]]></kwd>
</kwd-group>
</article-meta>
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