<?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>S0188-49992020000100073</article-id>
<article-id pub-id-type="doi">10.20937/rica.2020.36.53201</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[STUDY OF THE DEGRADATION OF CHLORPYRIFOS IN CONTAMINATED SOILS IN THE PRESENCE OF THE RED CALIFORNIA EARTHWORM Eisenia foetida]]></article-title>
<article-title xml:lang="es"><![CDATA[ESTUDIO DE LA DEGRADACIÓN DE CLORPIRIFOS EN SUELOS CONTAMINADOS EN PRESENCIA DE LOMBRIZ ROJA CALIFORNIANA Eisenia foetida]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonzales-Condori]]></surname>
<given-names><![CDATA[Elvis Gilmar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Choquenaira-Quispe]]></surname>
<given-names><![CDATA[Celia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Revilla]]></surname>
<given-names><![CDATA[Stamber Álvaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Católica de Santa María Facultad de Ciencias Farmacéuticas, Bioquímicas y Biotecnológicas Laboratorio del Proyecto Mercurio]]></institution>
<addr-line><![CDATA[Umacollo Arequipa]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Privada Autónoma del Sur  ]]></institution>
<addr-line><![CDATA[Urb. Santa Isabel Arequipa]]></addr-line>
<country>Perú</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Tecnológica del Perú (UTP)  ]]></institution>
<addr-line><![CDATA[Arequipa ]]></addr-line>
<country>Peru</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>1</numero>
<fpage>73</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000100073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Pesticides containing organophosphorus compounds, such as chlorpyrifos (CPF), are frequently used in agricultural activities, and their use has been increasing due to the presence of multiple plant diseases which threaten the production of vegetable food products. As a result of this practice, the soils in question are often found to be contaminated due to the fact that these pesticides do not immediately degrade and hence remain for long periods of time. The objective of this study was to evaluate the degradation of CPF in the presence and absence of the worm Eisenia foetida (EF) in soils contaminated with 40 mg/kg of CPF during a 28-day period. The D group, whose soil was sterilized and in which no EF worms were present, yielded a CPF-degradation result of 33.68 %. The C group, in which the soil was unsterilized and there were no EF worms present, yielded a degradation percentage of 37.16 %. On the other hand, the B group, containing sterilized soil in which the EF worms were present, yielded a degradation percentage of 60.76 %. Finally, with the A group, in which the soil was unsterilized and EF worms were present, degraded in 74.85 %.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Los pesticidas que contienen compuestos organofosforados, como clorpirifos (CPF), se utilizan con frecuencia en actividades agrícolas, y su uso ha ido en aumento debido a la presencia de múltiples plagas en plantas, las cuales amenazan la producción de alimentos de origen vegetal. Como resultado de esta actividad, los suelos en estudio se encuentran a menudo contaminados, ya que estos pesticidas no se degradan inmediatamente y por lo tanto permanecen durante largos periodos de tiempo. El objetivo de este estudio, realizado en suelos contaminados con 40 mg/kg de CPF durante un periodo de 28 días, fue evaluar la degradación de CPF en presencia y ausencia de la lombriz Eisenia foetida (EF). En el grupo D, cuyo suelo estaba esterilizado y en ausencia de EF, se obtuvo una degradación del CPF de 33.68 %. En el grupo C, donde el suelo no estaba esterilizado y en ausencia de EF, se obtuvo un porcentaje de degradación de 37.16 %. Por otro lado, el grupo B, que contenía suelo esterilizado en presencia de EF, mostró un porcentaje de degradación de 60.76 %. Finalmente, el grupo A, cuyo suelo no estaba esterilizado y en presencia de EF, se degradó en un 74.85 %.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[organophosphorus]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[remediation]]></kwd>
<kwd lng="en"><![CDATA[chlorpyrifos]]></kwd>
<kwd lng="en"><![CDATA[worm]]></kwd>
<kwd lng="es"><![CDATA[organofosforados]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[remediación]]></kwd>
<kwd lng="es"><![CDATA[clorpirifos]]></kwd>
<kwd lng="es"><![CDATA[lombriz]]></kwd>
</kwd-group>
</article-meta>
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