<?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>2222-145X</journal-id>
<journal-title><![CDATA[Reportes científicos de la FACEN]]></journal-title>
<abbrev-journal-title><![CDATA[Rep. cient. FACEN]]></abbrev-journal-title>
<issn>2222-145X</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Exactas y Naturales]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2222-145X2019000100025</article-id>
<article-id pub-id-type="doi">10.18004/rcfacen.2019.10.1.25</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Fitorremediación de cromo en efluente de curtiembre empleando Eichhornia crassipes]]></article-title>
<article-title xml:lang="en"><![CDATA[Phytoremediation of chrome in tannery effluents using Eichhornia crassipes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Medina Garcia]]></surname>
<given-names><![CDATA[Leonida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[Francisco Paulo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kurita Oyamada]]></surname>
<given-names><![CDATA[Hajime Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Bonet]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Galeano]]></surname>
<given-names><![CDATA[Edgar Fidel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Viera]]></surname>
<given-names><![CDATA[Mariza R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Asunción Facultad de Ciencias Exactas y Naturales Departamento de Química]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Tecnología, Normalización y Metrología (INTN)  ]]></institution>
<addr-line><![CDATA[Asunción ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Asunción Facultad de Ciencias Exactas y Naturales Departamento de Biología]]></institution>
<addr-line><![CDATA[San Lorenzo ]]></addr-line>
<country>Paraguay</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de la Plata  ]]></institution>
<addr-line><![CDATA[La Plata ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>1</numero>
<fpage>25</fpage>
<lpage>36</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S2222-145X2019000100025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S2222-145X2019000100025&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S2222-145X2019000100025&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El cromo es uno de los mayores contaminantes inorgánicos de las aguas y del suelo en el Paraguay, acarreando serios problemas ambientales. Este metal proviene principalmente de efluentes de curtiembres que son vertidos a cursos de aguas. El objetivo de este trabajo es emplear técnicas de remediación alternativas para el tratamiento de aguas con alto contenido de cromo, utilizando medios naturales (plantas), en un proceso denominado fitorremediación. Ejemplares de Eichhornia crassipes fueron sometidos a una contaminación controlada con Cr3+ durante 20 días y se consideró la máxima concentración tolerada durante todo el periodo del experimento para estudiar la taza y la capacidad de absorción del Cr3+ de la especie. Las constantes cinéticas de este proceso fueron: constante de absorción K0,10 días -1, y tiempo medio de absorción: t1/2= 6,8 días. En el efluente final de curtiembre, con 22,4 mg.L-1 de Cr3+, a las 48 horas se produjo una absorción casi completa del cromo suministrado, quedando en el efluente 1,28 mg.L-1 del cromo. Los factores de translocación del cromo para E. crassipes fueron 0,008 y 0,02 en agua de pozo y efluente respectivamente y los factores de bioacumulación 11,6 y 3,2 respectivamente. No se encontraron diferencias significativas entre el contenido de clorofila en los vegetales expuestas en solución de cromo en comparación con el control. Tampoco se encontró oxidación del Cr3+ a Cr6+ medidos espectrofotométricamente.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Chromium is one of the largest inorganic pollutants in water and soil in Paraguay, causing serious environmental problems. This metal comes mainly from tannery effluents that are dumped into water courses. The aim of this work was to use alternative remediation techniques for the treatment of waters with high chromium content, using natural media (plants), in a process called phytoremediation. Specimens of Eicchornia crassipes were subjected to controlled contamination with Cr3+ for 20 days and the maximum tolerated concentration during the whole period of the experiment was considered to study the cup and the absorption capacity of Cr3+ from the species. The kinetic constants of this process were: constant absorption: Kab= 0.10 days -1, and absorption half time: t= 6.8 dys. In the final tannery effluent with 22.4 mg.L-1 of Cr3+, at 48 hours there was almost complete absorption of the chromium supplied, leaving 1.28 mg.L-1 of chromium in the effluent. The chromium translocation factors for E. crassipes were 0.008 and 0.02 in well water and effluent respectively and bioaccumulation factors were 11.6 and 3.2 respectively. No significant differences were found between the chlorophyll content in the plants exposed in chromium solution compared to the control. Neither was oxidation found from Cr3+ to Cr6+ spectrophotometrically measured.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[fitorremediación]]></kwd>
<kwd lng="es"><![CDATA[cromo]]></kwd>
<kwd lng="es"><![CDATA[efluente de curtiembre]]></kwd>
<kwd lng="es"><![CDATA[Eichhornia crassipes]]></kwd>
<kwd lng="en"><![CDATA[Phytoremediation]]></kwd>
<kwd lng="en"><![CDATA[chrome tannery effluent]]></kwd>
<kwd lng="en"><![CDATA[Eichhornia crassipes]]></kwd>
</kwd-group>
</article-meta>
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