<?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>S0188-49992016000400375</article-id>
<article-id pub-id-type="doi">10.20937/rica.2016.32.04.01</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación de elementos traza en agua de río y manantial del área minera de Ocampo, Chihuahua, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Assessment of trace elements in river and spring water from Ocampo mining area, Chihuahua, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chacón Chumacero]]></surname>
<given-names><![CDATA[Karla Ozuky]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pinedo Álvarez]]></surname>
<given-names><![CDATA[Carmelo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rentería Villalobos]]></surname>
<given-names><![CDATA[Marusia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Facultad de Zootecnia y Ecología Departamento de Recursos Naturales]]></institution>
<addr-line><![CDATA[Chihuahua ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2016</year>
</pub-date>
<volume>32</volume>
<numero>4</numero>
<fpage>375</fpage>
<lpage>384</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992016000400375&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992016000400375&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992016000400375&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La industria forestal y la actividad minera contribuyen con más del 80 % en la economía de la ecorregión templada de estado de Chihuahua, México. El objetivo de este trabajo fue evaluar las concentraciones de algunos elementos traza en muestras de agua de ríos y manantiales (que son las principales fuentes de suministro para uso y consumo humano) en el ambiente circundante del corredor minero de oro y plata en el distrito de Ocampo, localizado en el centro oeste del estado. Los parámetros de temperatura, sólidos disueltos totales, turbidez y pH fueron medidos in situ. Las concentraciones de elementos mayoritarios (Ca y Mg) y traza (Li, Ni, Sb, Se, Cu y Zn) fueron obtenidas con un espectrómetro de emisión óptica. El promedio de la concentración de Ca fue más alto en agua de río en comparación con el de manantial, mientras que los contenidos de Mg sólo fueron detectados en agua de río. Los elementos traza medidos en agua de río y manantial presentaron una tendencia decreciente según contenidos de Ni &#707; Cu &#707; Zn &#707; Li &gt; Se &gt; Sb. Las concentraciones más altas de elementos traza fueron encontradas en un área altamente impactada por actividades relacionadas con la minería. La mayoría de las concentraciones de elementos traza estuvieron por debajo de los límites permisibles establecidos por la Agencia de Protección Ambiental de Estados Unidos de América y la normatividad mexicana. Sin embargo, las concentraciones de Cu, Ni y Zn obtenidas en agua de río fueron más altas que las marcadas por las directrices para la vida acuática establecidas en Canadá. Aunque, la concentración elemental determinada está por debajo de los límites permisibles, estos estudios son de gran importancia porque el agua de esta región es usada para consumo humano, como agua de riego y para la industria.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The forestry industry and gold mining contribute to more than 80 % of the economy of the temperate ecoregion of Chihuahua, Mexico. The aim of this work was to assess the concentrations of some trace elements in water samples from the rivers and the springs in the surrounding environment of the gold-silver runner mining in the Ocampo district. It is located in the center-west of Chihuahua, Mexico. Water sampling was performed on rivers and springs, which are the main water supply sources for human consumption. Temperature, total dissolved solids, turbidity and pH parameters were measured in situ. Some mayor (Ca and Mg) and trace elements (Li, Ni, Sb, Se, Cu, and Zn) were quantified by inductively coupled plasma of optical emission. The average of Ca concentration in water was higher in rivers than in springs, whereas Mg contents were only detected in river water. Trace elements measured in waters of river and spring were in decrease trend Ni &#707; Cu &#707; Zn &#707; Li &gt; Se &gt; Sb. The highest trace element concentrations were found in an area highly impacted by activities related to the mining. Most of trace elements concentrations assessed in this work were lower than limits for drinking water marked by Unites States Environmental Protection Agency and Mexican regulations. However, concentrations of Cu, Ni, and Zn obtained in water from rivers are higher than Canadian guidelines for protection of the aquatic life. Although, elemental concentrations determined here are below of the allowed limits, these studies are important because the water in this region have different uses such as human consumption, water supply to agricultural lands, and to industry.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[zona impactada]]></kwd>
<kwd lng="en"><![CDATA[heavy metal]]></kwd>
<kwd lng="en"><![CDATA[affected area]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alloway]]></surname>
<given-names><![CDATA[B.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[D.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Chemical principles of environmental pollution]]></source>
<year>1993</year>
<page-range>291</page-range><publisher-loc><![CDATA[Nueva York ]]></publisher-loc>
<publisher-name><![CDATA[Blackie Academic and Professional]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Status of anthropogenically induced metal pollution in the Kanpur Unnao industrial region of the Ganga plain, India]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ansari]]></surname>
<given-names><![CDATA[A. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Singh]]></surname>
<given-names><![CDATA[I. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Tobschall]]></surname>
<given-names><![CDATA[H. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environm. Geo.]]></source>
<year>1999</year>
<volume>38</volume>
<page-range>25-33</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Toxicological profile for Antimony]]></article-title>
<collab>ATSDR</collab>
<source><![CDATA[Federal public health agency of the U.S. Department of Health and Human Services, 7440-36-0]]></source>
<year>1992</year>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Toxicological profile for Selenium]]></article-title>
<collab>ATSDR</collab>
<source><![CDATA[Federal public health agency of the U.S. Department of Health and Human Services, 7782-49-2]]></source>
<year>2003</year>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Water quality for agriculture]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayers]]></surname>
<given-names><![CDATA[R. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Westcot]]></surname>
<given-names><![CDATA[D. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[FAO irrigation and drainage paper 29]]></source>
<year>1976</year>
<page-range>1-96</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Azarcoya González]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[La Sierra Tarahumara, el bosque y los pueblos originarios: estudio de caso de Chihuahua México]]></source>
<year>2012</year>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Contested terrain: Mining and the environment]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bridge]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Annu. Rev. Environ. Resour.]]></source>
<year>2004</year>
<volume>29</volume>
<page-range>205-59</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Water pollution due to mining activity. Causes and consequences]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bud]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Duma]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Denu&#355;]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Ta&#351;cu]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[BHM Berg-Und Hüttenmännische Monatshefte]]></source>
<year>2007</year>
<volume>152</volume>
<numero>326</numero>
<issue>326</issue>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<collab>CCME</collab>
<source><![CDATA[A protocol for the derivation of water quality guidelines for the protection of aquatic life 2007. Canadian Council of Ministers of the Environment]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Environmental geochemistry of the Guanajuato mining district, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrillo-Chávez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Morton-Bermea]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Partida]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Rivas-Solorzano]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Oesler]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Garc&#305;&#769;a-Meza]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Cienfuegos]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ore. Geol. Rev.]]></source>
<year>2003</year>
<volume>23</volume>
<page-range>277-97</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="">
<collab>CONANP</collab>
<source><![CDATA[Comisión Nacional de Áreas Naturales Protegidas. Programa de Manejo Área de Protección de Flora y Fauna Tutuaca. Primera Edición]]></source>
<year>2014</year>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[National primary drinking water regulations: Ground water rule (40 CFR Parts 141 and 142)]]></article-title>
<collab>EPA</collab>
<source><![CDATA[Environmental Protection Agency, EUA]]></source>
<year>2000</year>
<page-range>100</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[National recommended water quality criteria]]></article-title>
<collab>EPA</collab>
<source><![CDATA[Environmental Protection Agency]]></source>
<year>2002</year>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Microwave assisted acid digestion of aqueous samples and extracts. Método 3015A]]></article-title>
<collab>EPA</collab>
<source><![CDATA[Environmental Protection Agency]]></source>
<year>2007</year>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Evaluation of potential of multiple endmember spectral mixture analysis (MESMA) for surface coal mining affected area mapping in different world forest ecosystems]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernández-Manso]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Quintano]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Roberts]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Remote Sens. Environ.]]></source>
<year>2012</year>
<volume>127</volume>
<page-range>181-93</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Impact of mining activities on sediments in a semi-arid environment: San Pedro River, Sonora, Mexico]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez-Álvarez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Valenzuela-García]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Meza-Figueroa]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[de la O Villanueva]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Hernández]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Almendariz-Tapia]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Segura]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Appl. Geochem.]]></source>
<year>2011</year>
<volume>26</volume>
<page-range>2101-12</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Technology, managerial, and policy initiatives for improving environmental performance in small-scale gold mining industry]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hilson]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Van Der Vorst]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environ. Manage.]]></source>
<year>2002</year>
<volume>30</volume>
<page-range>764-77</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Transport and sediment-water partitioning of trace metals in acid mine drainage: an example from the abandoned Kwangyang Au-Ag mine area, South Korea]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hun-Bok]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Seong-Tack]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernhard]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Soon-Oh]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Seong-Sook]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Pyeong-Koo]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environ. Geol.]]></source>
<year>2005</year>
<volume>48</volume>
<page-range>437-49</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Prontuario de información geográfica municipal de los Estados Unidos Mexicanos. Moris, Chihuahua, clave geoestadística 08047]]></article-title>
<collab>INEGI</collab>
<source><![CDATA[Instituto Nacional de Estadística y Geografía]]></source>
<year>2005</year>
<month>a</month>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Prontuario de información geográfica municipal de los Estados Unidos Mexicanos. Ocampo, Chihuahua, clave geoestadística 08051]]></article-title>
<collab>INEGI</collab>
<source><![CDATA[Instituto Nacional de Estadística y Geografía]]></source>
<year>2005</year>
<month>b</month>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Sustainability and gold mining in the developing world]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kumah]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Clean. Prod.]]></source>
<year>2006</year>
<volume>14</volume>
<page-range>315-23</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Ingeniería de Aguas Residuales. Description and model representation]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Metcalf]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Eddy]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[McGraw Hill. Wat. SA]]></source>
<year>1996</year>
<volume>14</volume>
<page-range>185-92</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Geochemical processes controlling mobilization of arsenic and trace elements in shallow aquifers and surface waters in the Antequera and Poopó mining regions, Bolivian Altiplano]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[R. O. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Rötting]]></surname>
<given-names><![CDATA[T. S.]]></given-names>
</name>
<name>
<surname><![CDATA[French]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sracek]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Bundschuh]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Quintanilla]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bhattacharya]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Hydrol.]]></source>
<year>2014</year>
<volume>518</volume>
<page-range>421-33</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Norma Oficial Mexicana NOM-001-ECOL-1996. Límites máximos permisibles de contaminantes en las descargas de aguas residuales en aguas y bienes nacionales]]></article-title>
<collab>SEMARNAT</collab>
<source><![CDATA[Secretaría de Medio Ambiente y Recursos Naturales. Diario Oficial de la Federación]]></source>
<year>1996</year>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carta geoquímica por Cu, Tecoripa H12-12, Sonora y Chihuahua. Levantamiento geoquímico por sedimentos de arroyo. Informe Final]]></article-title>
<collab>SGM</collab>
<source><![CDATA[Servicio Geológico Mexicano]]></source>
<year>2000</year>
<month>a</month>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carta geoquímica por Sb, Tecoripa H12-12, Sonora y Chihuahua. Informe Final]]></article-title>
<collab>SGM</collab>
<source><![CDATA[Servicio Geológico Mexicano]]></source>
<year>2000</year>
<month>b</month>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carta geoquímica por Zn, Tecoripa H12-12, Sonora y Chihuahua]]></article-title>
<collab>SGM</collab>
<source><![CDATA[Servicio Geológico Mexicano]]></source>
<year>2000</year>
<month>c</month>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Carta geológico-minera]]></article-title>
<collab>SGM</collab>
<source><![CDATA[Servicio Geológico Mexicano]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effects of chronic turbidity on density and growth of steelheads and coho salmon]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sigler]]></surname>
<given-names><![CDATA[J. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Bjornn]]></surname>
<given-names><![CDATA[T. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Everest]]></surname>
<given-names><![CDATA[F. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Trans. Am. Fish Soc.]]></source>
<year>1984</year>
<volume>113</volume>
<page-range>142-50</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Desarrollos de niveles guía nacionales de calidad de agua ambiente correspondientes a zinc]]></article-title>
<collab>SRHNA</collab>
<source><![CDATA[Subsecretaría de Recursos Hídricos de la Nación, Argentina]]></source>
<year>2004</year>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Distribution of heavy metals in surface water of Ranipet industrial area in Tamil Nadu, India]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Srinivasa Gowd]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Govil]]></surname>
<given-names><![CDATA[P. K.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environ. Monit. Assess.]]></source>
<year>2008</year>
<volume>136</volume>
<page-range>197-207</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Modificación a la norma NOM-127-SSA1-1994, Salud Ambiental. Agua para uso y consumo humano. Límites permisibles de calidad y tratamientos a que debe someterse el agua para su potabilización]]></article-title>
<collab>SSA</collab>
<source><![CDATA[Secretaría de Salud Ambiental. Diario Oficial de la Federación]]></source>
<year>1994</year>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Índices de calidad de agua en fuentes superficiales utilizadas en la producción de agua para consumo humano. Una revisión crítica]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Cruz]]></surname>
<given-names><![CDATA[C. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Patiño]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Ingenierías Universidad de Medellín]]></source>
<year>2009</year>
<volume>8</volume>
<page-range>79-94</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Reconstrucción de la precipitación estacional para el barlovento de la Sierra Madre Occidental con anillos de crecimiento de Pseudotsuga menziesii (Mirb.) Franco]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villanueva]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Fulé]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Paredes]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Estrada]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Revista Ciencia Forestal en México]]></source>
<year>2009</year>
<volume>34</volume>
<page-range>37-69</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Guidelines for drinking-water quality. 3ra. ed]]></article-title>
<collab>WHO</collab>
<source><![CDATA[World Health Organization, Ginebra, Suiza]]></source>
<year>2008</year>
<page-range>492</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The longevity of minewater pollution: A basis for decision-making]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Younger]]></surname>
<given-names><![CDATA[P. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sci. Total Environ.]]></source>
<year>1997</year>
<volume>194</volume>
<page-range>457-66</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
