<?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>S0188-49992019000100047</article-id>
<article-id pub-id-type="doi">10.20937/rica.2019.35.01.04</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[CARACTERIZACIÓN HIDROGEOQUÍMICA EN LA CUENCA HIDROLÓGICA EL CARRIZAL, BAJA CALIFORNIA SUR, MÉXICO]]></article-title>
<article-title xml:lang="en"><![CDATA[HYDROGEOCHEMICAL CHARACTERIZATION IN THE EL CARRIZAL HYDROLOGICAL BASIN, BAJA CALIFORNIA SUR, MEXICO]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Pedroza]]></surname>
<given-names><![CDATA[Karen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murillo-Jiménez]]></surname>
<given-names><![CDATA[Janette Magalli]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marmolejo-Rodríguez]]></surname>
<given-names><![CDATA[Ana Judith]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nava-Sánchez]]></surname>
<given-names><![CDATA[Enrique Hiparco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Puente]]></surname>
<given-names><![CDATA[Pedro Abelardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wurl]]></surname>
<given-names><![CDATA[Jobst]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Pérez]]></surname>
<given-names><![CDATA[Eliseo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Departamento de Oceanología Centro Interdisciplinario de Ciencias Marinas]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geología Departamento de Geoquímica]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Baja California Sur Departamento Académico de Ciencias de la Tierra ]]></institution>
<addr-line><![CDATA[La Paz Baja California Sur]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Geociencias Departamento de Hidrogeoquímica]]></institution>
<addr-line><![CDATA[Juriquilla Querétaro]]></addr-line>
<country>Mexico</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>47</fpage>
<lpage>64</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992019000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992019000100047&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992019000100047&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La cuenca hidrológica El Carrizal se ubica al suroeste del estado de Baja California Sur, México. El distrito minero El Triunfo-San Antonio, donde se localizan jales mineros con altas concentraciones de elementos potencialmente tóxicos (EPT), se encuentra en la parte alta de la cuenca. El crecimiento demográfico en la ciudad de La Paz ha ejercido presión para la transferencia de agua de esta cuenca, por lo que el objetivo de este trabajo fue caracterizar la composición hidrogeoquímica del agua subterránea y evaluar su calidad para consumo humano. En 2015, durante las épocas de estiaje (abril-mayo) y lluvias (noviembre-diciembre), se muestrearon 19 pozos de la cuenca El Carrizal y 11 pozos de las cuencas La Paz, La Matanza y Santa Inés-La Muela. Los parámetros físicos y químicos fueron medidos in situ y los iones mayores (Na+, K+, Ca2+, Mg2+, Cl-, SO4 2-, HCO3 - y NO3 -) y EPT (As y Cd) se determinaron en el laboratorio. Se encontró que los tipos de agua están asociados principalmente a la litología de la zona en la parte alta de la cuenca El Carrizal, y que el tipo de agua que predomina es bicarbonatada cálcica (Ca2+-HCO3 -). En el área de estudio el 67 % de los pozos en época de estiaje rebasaron el límite de la concentración de As (10 µg/L). Es necesario establecer un monitoreo continuo de estos pozos de agua subterránea para apoyar los programas de abasto a la población.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The El Carrizal hydrological basin is located in the southwest zone of the state of Baja California Sur, Mexico. The El Triunfo-San Antonio mining district, where mine tailings are located with high concentrations of potentially toxic elements (PTEs), is located in the higher part of the basin. The demographic growth of the city of La Paz has pushed to transfer water from this basin, so the aim of this work was to characterize the hydrogeochemical composition of groundwater and to evaluate the water quality for human consumption. In the year 2015, 19 wells in the El Carrizal basin and 11 wells in the basins of La Paz, La Matanza and Santa Inés-La Muela were sampled during the dry (April-May) and rainy (November-December) seasons. The physicochemical parameters were measured in situ, the major ions (Na+, K+, Ca2+, Mg2+, Cl-, SO4 2-, HCO3 - and NO3 -) and PTEs (As, Cd) were determined in the laboratory. The results indicated that the types of water are mainly associated with the lithology of the area in the upper part of the El Carrizal basin, and that the type of water that predominates contains Ca2+ and HCO3 -. In the study area, 67 % of the wells in the dry season exceeded the concentration limit of As (10 &#956;g/L). A continuous monitoring of these groundwater wells is necessary to support the supply programs for the population.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[pozos de agua]]></kwd>
<kwd lng="es"><![CDATA[iones mayores]]></kwd>
<kwd lng="es"><![CDATA[elementos potencialmente tóxicos]]></kwd>
<kwd lng="es"><![CDATA[As]]></kwd>
<kwd lng="es"><![CDATA[jales]]></kwd>
<kwd lng="es"><![CDATA[minería]]></kwd>
<kwd lng="en"><![CDATA[water well]]></kwd>
<kwd lng="en"><![CDATA[major ions]]></kwd>
<kwd lng="en"><![CDATA[potential toxic elements]]></kwd>
<kwd lng="en"><![CDATA[As]]></kwd>
<kwd lng="en"><![CDATA[tailings]]></kwd>
<kwd lng="en"><![CDATA[mining]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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