<?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>2224-5421</journal-id>
<journal-title><![CDATA[Revista Cubana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cub Quim]]></abbrev-journal-title>
<issn>2224-5421</issn>
<publisher>
<publisher-name><![CDATA[Ediciones UO, Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-54212019000100065</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Procesos de contaminación-purificación en aguas superficiales afectadas por el vertimiento de efluentes de una tenería]]></article-title>
<article-title xml:lang="en"><![CDATA[Pollution-purification processes in surface waters affected by the discharge of tannery effluents]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montalván-Estrada]]></surname>
<given-names><![CDATA[Adelmo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilera-Corrales]]></surname>
<given-names><![CDATA[Yuri]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brígido-Flores]]></surname>
<given-names><![CDATA[Osvaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Veitia-Rodríguez]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez-LaO]]></surname>
<given-names><![CDATA[Lázaro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro de Ingeniería Ambiental de Camagüey  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la Habana Instituto Superior de Ciencias y Tecnologías Aplicadas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Camagüey Facultad de Ciencias Aplicadas a la Industria ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2019</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>65</fpage>
<lpage>80</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-54212019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-54212019000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-54212019000100065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se hizo una evaluación del impacto de las aguas residuales vertidas por una tenería, que posee una huella hídrica gris de 5 194 m3/d, en la calidad del agua del cuerpo receptor. Se establecieron cuatro estaciones de monitoreo a lo largo del curso de agua superficial y se tomaron muestras con una frecuencia semanal, por espacio de tres meses. Se pudo observar que aproximadamente en los primeros tres kilómetros del curso de agua ocurre una fuerte disminución de los valores para la gran mayoría de los parámetros evaluados, lo cual se relaciona con el predominio de los procesos físicos de sedimentación. La comparación con los valores de referencia en cuerpos de agua poco contaminados, muestra que los procesos de autodepuración no pueden restablecer la calidad del agua que existía antes del vertimiento de los efluentes: hay un incremento de la salinidad y una disminución del oxígeno disuelto.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT It was made an evaluation of the impact of wastewaters discharged by a tannery, which has a gray water footprint of 5 194 m3/d, in the water quality of the receiving body. Four monitoring stations were established along the surface watercourse and samples were taken on a weekly basis, for three months. It was observed that approximately in the first three kilometers of the watercourse there is a strong decrease in the values for the great majority of the evaluated parameters, which is related to the predominance of the physical processes of sedimentation. The comparison with reference values in low-contaminated water bodies shows that the self-purification processes cannot restore the water quality that existed before the effluents were discharged: there is an increase in salinity and a decrease in dissolved oxygen.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[tenería]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[purificación]]></kwd>
<kwd lng="es"><![CDATA[aguas superficiales]]></kwd>
<kwd lng="en"><![CDATA[tannery]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[purification]]></kwd>
<kwd lng="en"><![CDATA[surface waters]]></kwd>
</kwd-group>
</article-meta>
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