<?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>S0188-49992019000200307</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.02.04</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[RESIDUOS DE PLAGUICIDAS EN SUELOS DE USO AGRÍCOLA Y RIESGO DE EXPOSICIÓN EN LA MICROCUENCA LOS ZARZALES, MUNICIPIO RIVAS DÁVILA, ESTADO MÉRIDA, VENEZUELA]]></article-title>
<article-title xml:lang="en"><![CDATA[PESTICIDE RESIDUES IN AGRICULTURAL SOILS OF LOS ZARZALES MICRO-WATERSHED, RIVAS DÁVILA MUNICIPALITY, MÉRIDA STATE, VENEZUELA]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Fernández]]></surname>
<given-names><![CDATA[José Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez-Díaz]]></surname>
<given-names><![CDATA[Pedro Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivas-Rojas]]></surname>
<given-names><![CDATA[Edgard Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Miranda-Contreras]]></surname>
<given-names><![CDATA[Leticia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Los Andes Centro de Microscopía Electrónica ]]></institution>
<addr-line><![CDATA[ Mérida]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Los Andes Facultad de Ciencias Forestales y Ambientales Escuela de Ingeniería Forestal]]></institution>
<addr-line><![CDATA[ Mérida]]></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>2</numero>
<fpage>307</fpage>
<lpage>315</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000200307&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000200307&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000200307&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La preocupación sobre la presencia de residuos de plaguicidas en suelos de uso agrícola es cada vez mayor debido a que constituyen un riesgo ambiental y una fuente de exposición humana. En este trabajo se determinó la presencia de estos residuos y el riesgo de exposición en la microcuenca Los Zarzales, municipio Rivas Dávila, Mérida, Venezuela. Se tomaron muestras de suelos en la etapa inicial, media y final de cultivos de ciclo corto, se extrajeron los principios activos y se analizaron por cromatografía líquida de alta resolución. El riesgo de exposición se estimó calculando la dosis de plaguicidas a través de la ingesta no dietética de suelo y polvo contaminado, según los criterios de la US-EPA. La mayor concentración y variedad de compuestos se registró durante la etapa media: 26 ± 7 mg/kg de residuos totales y 100 % de frecuencia de detección, destacando entre ellos paraquat (15 ± 7 mg/kg), carbendazim (8 ± 2 mg/kg), mancozeb (3.7 ± 0.7 mg/kg) y carbofurano (1.2 ± 0.5 mg/kg). Con base en estos valores, las dosis diarias calculadas fueron: 1.5, 0.8, 0.37 y 0.12 µg/día, respectivamente, todas las cuales resultaron estar por debajo de la ingesta diaria admisible establecida por la Organización de las Naciones Unidas para la Agricultura y la Alimentación y la Organización Mundial de la Salud, que es utilizada como referencia. A pesar de ello, la dosis total alcanzó los 2.8 µg/día, lo cual se considera que puede constituir un riesgo de exposición.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT There is a growing concern about the presence of pesticide residues in agricultural land because they constitute an environmental risk and a source of human exposure. In this work, the presence of these residues and the risk of exposure was determined in the micro-watershed of Los Zarzales, Rivas Dávila municipality, Mérida, Venezuela. Soil samples were taken in the initial, middle and final stages of short cycle crops, and the active ingredients were extracted and analyzed by HPLC. The risk of exposure was estimated by calculating the dose of pesticides through non-dietary intake of contaminated soil and dust, according to the US-EPA criteria. The highest concentration and variety of compounds was recorded during the middle stage: 26 ± 7 mg/kg of total residues and 100% detection frequency, standing out among them paraquat (15 ± 7 mg/kg), carbendazim (8 ± 2 mg/kg), mancozeb (3.7 ± 0.7 mg/kg) and carbofuran (1.2 ± 0.5 mg/kg). Based on these values, the calculated daily doses were 1.5, 0.8, 0.37 and 0.12 &#956;g/day, respectively, all of which were below the admissible daily intake established by FAO/WHO, which is used as reference. Despite of this, the total dose reached 2.8 &#956;g/day, which is considered as a risk of exposure.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[carbendazim]]></kwd>
<kwd lng="es"><![CDATA[carbofurano]]></kwd>
<kwd lng="es"><![CDATA[mancozeb]]></kwd>
<kwd lng="es"><![CDATA[paraquat]]></kwd>
<kwd lng="es"><![CDATA[agroquímicos]]></kwd>
<kwd lng="en"><![CDATA[carbendazim]]></kwd>
<kwd lng="en"><![CDATA[carbofuran]]></kwd>
<kwd lng="en"><![CDATA[mancozeb]]></kwd>
<kwd lng="en"><![CDATA[paraquat]]></kwd>
<kwd lng="en"><![CDATA[agrochemicals]]></kwd>
</kwd-group>
</article-meta>
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