<?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>0250-5460</journal-id>
<journal-title><![CDATA[Revista Boliviana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Bol. Quim]]></abbrev-journal-title>
<issn>0250-5460</issn>
<publisher>
<publisher-name><![CDATA[Universidad Mayor de San Andrés]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0250-54602023000400001</article-id>
<article-id pub-id-type="doi">10.34098/2078-3949.40.4.1</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de la concentración de metales pesados en las aguas superficiales del río chacapalca para fines de riego]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villanueva Alvarado]]></surname>
<given-names><![CDATA[Tanya Luz]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Belizario Quispe]]></surname>
<given-names><![CDATA[Germán]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chui Betancur]]></surname>
<given-names><![CDATA[Heber N.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perez Argollo]]></surname>
<given-names><![CDATA[Katia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,aff2  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,aff3  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2023</year>
</pub-date>
<volume>40</volume>
<numero>4</numero>
<fpage>1</fpage>
<lpage>8</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S0250-54602023000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S0250-54602023000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S0250-54602023000400001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se evaluó la concentración de metales pesados como posibles contaminantes en el lecho y cauce del rio Chacapalca, hasta su desembocadura en el lago Titicaca. Las concentraciones por encima de la norma impactan negativamente en las poblaciones aledañas afectando diversas actividades humanas. Se definieron dos puntos geográficos de muestreo de aguas superficiales, RChac1 y RChac2 según protocolo de muestreo. El monitoreo se realizó en dos épocas del año 2017 al 2018, para evaluar la variación estacional de los parámetros más resaltantes de mayor concentración determinados analíticamente in situ. Los resultados obtenidos demostraron que no existen altas concentraciones de cadmio, plomo y mercurio en los dos mencionados puntos de estudio. Sin embargo, el punto RChac1 puede ser considerado como punto crítico.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Evaluation of the concentration of heavy metals in the surface waters of the Chacapalca river for irrigation purposes. The concentration of heavy metals was evaluated as possible contaminants in the bed and channel of the Chacapalca River, until its drainage into Lake Titicaca. Concentrations above the norm negatively impact surrounding populations, affecting various human activities. Two geographical sampling points of surface waters were defined, RChac1 and RChac2 according to the sampling protocol. The monitoring was carried out in two periods from 2017 to 2018, to evaluate the seasonal variation of the most notable parameters with the highest concentration determined analytically in situ. The results obtained demonstrated that there are no high concentrations of cadmium, lead and mercury in the two aforementioned study points. However, the point RCac1 can be considered as a critical point.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Surface waters]]></kwd>
<kwd lng="en"><![CDATA[Pollution]]></kwd>
<kwd lng="en"><![CDATA[Heavy metals]]></kwd>
<kwd lng="en"><![CDATA[Chacapalca]]></kwd>
<kwd lng="en"><![CDATA[River]]></kwd>
<kwd lng="es"><![CDATA[Aguas superficiales]]></kwd>
<kwd lng="es"><![CDATA[Contaminación]]></kwd>
<kwd lng="es"><![CDATA[
<kwd lng="es"><![CDATA[Chacapalca]]></kwd>
<kwd lng="es"><![CDATA[Río]]></kwd>
</kwd-group>
</article-meta>
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