<?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>S0188-49992022000100119</article-id>
<article-id pub-id-type="doi">10.20937/rica.54307</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fluoruro en aguas subterráneas de la región centro-norte de México y su posible origen]]></article-title>
<article-title xml:lang="en"><![CDATA[Fluoride in groundwater in the north-central region of Mexico and its possible origin]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[Mélida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón-Herrera]]></surname>
<given-names><![CDATA[María Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Missouri State University  ]]></institution>
<addr-line><![CDATA[Springfield Missouri]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación en Materiales Avanzados, Unidad Durango  ]]></institution>
<addr-line><![CDATA[Durango Durango]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>38</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992022000100119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992022000100119&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992022000100119&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las concentraciones más altas de fluoruro (F-) en México se encuentran principalmente en el agua subterránea de dos áreas: las zonas áridas de la zona centro-norte del país y las áreas geotermales. La primera se utiliza como suministro de agua potable para un gran número de personas, y es el objeto de este estudio. Se utilizó una base de datos con 1117 registros (2017-2019) para profundizar en el origen de este contaminante y su asociación con el contenido de arsénico (As) y con parámetros físicos y químicos reportados como posibles factores de enriquecimiento. La abundancia de rocas volcánicas félsicas en el material de aluvión, su distribución y su elevado contenido de F, las señalan como uno de los principales materiales generadores de este contaminante. En la región analizada, la concentración de F- varió en un rango de 0.03 a 27.9 mg/L, con 52, 45 y 36 % de muestras por encima del límite de 1.5 mg/L establecido por la NOM-127-SSA1-1994 para los estados de Zacatecas, Chihuahua y Durango, respectivamente. Se encontró correlación entre F- y As en los tres estados, siendo la más alta la de Zacatecas (r = 0.801, p &lt; 0.01). No se encontró asociación entre F- y la temperatura, F- y sólidos disueltos totales ni F- y Ca/Na. La elevada concentración de F- y su relación con As en agua de pozo hace imperativa la aplicación de un plan estratégico para salvaguardar la salud humana mediante la implementación de sistemas de potabilización para pozos con alto contenido de este elemento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The highest concentrations of fluoride (F-) in groundwater in Mexico occurs in mainly two areas: arid zones in the north-central part of the country and in regions containing hot springs. The former is the drinking water source for a large number of people, and it is the focus of this study. A database containing 1117 data (2017-2019) was used to investigate the origin of this contaminant and its association to arsenic (As) content as well as several physical and chemical parameters reported as potential enrichment factors. The higher abundance of felsic volcanic rocks in the alluvial fill, their distribution and high F content, point to these rocks as the main source of this contaminant. The concentration of F- varied between 0.03 and 27.9 mg/L, with 52, 45 and 36 % of samples above the 1.5 mg/L guideline established by the NOM-127, for the states of Zacatecas, Chihuahua and Durango, respectively. Significant correlation was found between F- and As in all three states; the highest correlation was obtained in Zacatecas (r = 0.801, p &lt; 0.01). No correlation was found between F- and temperature, F- and total dissolved solids, and F- and Ca/Na. The high content of F- and its co-occurrence with As makes imperative the application of a strategic plan to protect public health in this region through the implementation of water treatment on wells with high content of this element.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[arsénico]]></kwd>
<kwd lng="es"><![CDATA[acuífero de aluvión]]></kwd>
<kwd lng="es"><![CDATA[rocas volcánicas félsicas]]></kwd>
<kwd lng="es"><![CDATA[zonas áridas]]></kwd>
<kwd lng="en"><![CDATA[arsenic]]></kwd>
<kwd lng="en"><![CDATA[alluvial aquifer]]></kwd>
<kwd lng="en"><![CDATA[felsic volcanic rocks]]></kwd>
<kwd lng="en"><![CDATA[arid areas]]></kwd>
</kwd-group>
</article-meta>
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