<?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>0120-6230</journal-id>
<journal-title><![CDATA[Revista Facultad de Ingeniería Universidad de Antioquia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.fac.ing.univ. Antioquia]]></abbrev-journal-title>
<issn>0120-6230</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-62302024000100065</article-id>
<article-id pub-id-type="doi">10.17533/udea.redin.20230418</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A comparative analysis of Cr(VI) reduction with Cu2O, ZnO and Fe2O3 coatings grown by PEO]]></article-title>
<article-title xml:lang="es"><![CDATA[Análisis comparativo de la reducción de Cr(VI) con Cu2O, ZnO y Fe2O3 crecidos por OEP]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gordillo-Delgado]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Giraldo]]></surname>
<given-names><![CDATA[John Alexander]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Quindío Instituto Interdisciplinario de las Ciencias Grupo de Investigación en Ciencia Aplicada para el Desarrollo de la Ecorregión]]></institution>
<addr-line><![CDATA[ Quindío]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Quindío Facultad de Ciencias Básicas y Tecnologías Programa de Tecnología en Instrumentación Electrónica]]></institution>
<addr-line><![CDATA[ Quindío]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2024</year>
</pub-date>
<numero>110</numero>
<fpage>65</fpage>
<lpage>76</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-62302024000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-62302024000100065&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-62302024000100065&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Coatings on copper, zinc and stainless-steel substrates were fabricated using the plasma electrolytic oxidation (PEO) technique and their photocatalytic activity was evaluated in the reduction of Cr(VI), a highly toxic agent present in wastewater from industrial processes such as electroplating, manufacture of textile dyes, wood curing, and leather tanning. The concentration of hexavalent chromium in drinking water has been regulated to a maximum value established by national and international legislation of 0.05 ppm. The strategy of reduction to less toxic species such as Cr(III), followed by its precipitation in a basic medium, use several methods derived from chemistry, physics and biology for the treatment of water contaminated with this material. In the present work, some coatings of copper, zinc, and iron oxides were obtained over the corresponding metal sheets exposed to PEO, which were tested in a heterogeneous process of advanced oxidation with 1 ppm Cr(VI) solution under ultraviolet radiation. Thus, a reduction rate to Cr(III) close to 100 % in 60 min was obtained.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se fabricaron recubrimientos sobre sustratos de cobre, zinc y acero inoxidable mediante la técnica de oxidación electrolítica con plasma (OEP) y se evaluó su actividad fotocatalítica en la reducción del Cr(VI), un agente altamente tóxico presente en las aguas residuales de procesos industriales como la galvanoplastia, la fabricación de tintes textiles, el curtido de la madera y el curtido del cuero. La concentración de cromo hexavalente en el agua potable se ha regulado hasta un valor máximo establecido por la legislación nacional e internacional de 0.05 ppm. La estrategia de reducción a especies menos tóxicas como el Cr(III), seguida de su precipitación en un medio básico fundamenta varios métodos de la química, la física y la biología para el tratamiento del agua contaminada con este material. En el presente trabajo, se obtuvieron recubrimientos de óxidos de cobre, zinc y hierro sobre las correspondientes láminas expuestas a OEP, que se ensayaron en un proceso heterogéneo de oxidación avanzada con una solución de 1 ppm de Cr(VI) bajo radiación ultravioleta. Así, se obtuvo una tasa de reducción a Cr(III) cercana al 100 % en 60 min.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Plasma electrolytic oxidation]]></kwd>
<kwd lng="en"><![CDATA[Cu2O]]></kwd>
<kwd lng="en"><![CDATA[ZnO]]></kwd>
<kwd lng="en"><![CDATA[Fe2O3]]></kwd>
<kwd lng="en"><![CDATA[photoreduction of Cr(VI)]]></kwd>
<kwd lng="es"><![CDATA[Oxidación electrolítica con plasma]]></kwd>
<kwd lng="es"><![CDATA[Cu2O]]></kwd>
<kwd lng="es"><![CDATA[ZnO]]></kwd>
<kwd lng="es"><![CDATA[Fe2O3]]></kwd>
<kwd lng="es"><![CDATA[fotoreducción de Cr(VI)]]></kwd>
</kwd-group>
</article-meta>
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