<?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>0122-7483</journal-id>
<journal-title><![CDATA[Universitas Scientiarum]]></journal-title>
<abbrev-journal-title><![CDATA[Univ. Sci.]]></abbrev-journal-title>
<issn>0122-7483</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias de la Pontificia Universidad Javeriana de Bogotá.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-74832019000100073</article-id>
<article-id pub-id-type="doi">10.11144/javeriana.sc24-1.rcie</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Reducing Cr6+ in electroplating wastewater with Bacillus cereus strain B1]]></article-title>
<article-title xml:lang="es"><![CDATA[Reducción de Cr6+ en aguas residuales de galvanoplastia con una cepa de Bacillus cereus B1]]></article-title>
<article-title xml:lang="pt"><![CDATA[Redução do Cr6+ em águas residuais de galvanoplastia com cepa de Bacillus cereus B1]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Benavides]]></surname>
<given-names><![CDATA[Jennifer Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peña-Salamanca]]></surname>
<given-names><![CDATA[Enrique Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benítez-Campo]]></surname>
<given-names><![CDATA[Neyla]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salcedo-Reyes]]></surname>
<given-names><![CDATA[Juan Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Valle  ]]></institution>
<addr-line><![CDATA[Santiago de Cali ]]></addr-line>
<country>Colombia</country>
</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>24</volume>
<numero>1</numero>
<fpage>73</fpage>
<lpage>89</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-74832019000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-74832019000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-74832019000100073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this study Bacillus cereus was used to evaluate the Cr6+ reducing capacity in electroplating effluents. The Cr6+ bioreduction assays were carried out using real wastewater (RWW) from an electroplating plant and artificial wastewater (AWW), with and without added glucose. The AWW was prepared using Ni, Zn, Cu, Pb, and Cr salts, simulating RWW concentrations. The Cr6+ concentration and bacterial growth were monitored three times a day for the duration of five days. Also, were evaluated the effects of wastewater on B. cereus B1 morphology using scanning electron microscopy. Cr6+ reduction percentage of 100 % was reached for AWW containing glucose, of 71 % for AWW without glucose, of 75.6 % for RWW with glucose, and of 31.7 % for RWW without glucose. Despite the low reduction percentage obtained for RWW without glucose, concentrations of ± 0.14 mg/L of Cr6+ were reached, which were within allowed limits (0.5 mg/L of Cr6+ ). Electron Microscopy showed alterations in the bacterial cell wall and a decrease in size, mainly in the bacteria exposed to RWW. The results allow us to propose B. cereus B1 as a promising microorganism for use in the bioremediation of effluents containing Cr6+.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este estudio se utilizó Bacillus cereus para evaluar la capacidad de reducción de Cr6+ en efluentes de galvanoplastia. Los ensayos de biorreducción de Cr6+ se llevaron a cabo usando agua residual real (RWW) proveniente de una planta de galvanoplastia, y agua residual artificial (AWW), con y sin adición de glucosa. El AWW se preparó usando sales de Ni, Zn, Cu, Pb y Cr, simulando concentraciones de RWW. La concentración de Cr6+ y el crecimiento bacteriano se monitorearon 3 veces al día durante 5 días. También se evaluaron los efectos del agua residual en la morfología de B. cereus B1, usando microscopía electrónica de barrido. Se alcanzó una reducción del 100 % en AWW con glucosa, de 71 % en AWW sin glucosa, de 75.6 % en RWW con glucosa y de 31.7 % en RWW sin glucosa. A pesar del bajo porcentaje de reducción obtenido en RWW con glucosa, se alcanzaron concentraciones de ± 0.14 mg/L of Cr6+, que están dentro de los límites permitidos (0.5 mg/L de Cr6+). La microscopía electrónica mostró alteraciones en la pared de la célula bacteriana y una disminución en tamaño, principalmente en las bacterias expuestas a RWW. Los resultados nos permiten proponer a B. cereus B1 como un microorganismo promisorio para uso en biorremediación de efluentes que contengan Cr6+.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Neste estudo se utilizou Bacillus cereus para avaliar a capacidade de redução do Cr6+ em efluentes de galvanoplastia. Os ensaios de biorredução de Cr6+ se realizaram usando água residual real (RWW) proveniente de uma planta de galvanoplastia, e água residual artificial (AWW), com e sem adição de glicose. A AWW se preparou usando sais de Ni, Zn, Cu, Pb y Cr, simulando concentrações de RWW. As concentrações de Cr6+ e o crescimento bacteriano se monitoram 3 vezes ao dia durante 5 dias. Também se avaliaram os efeitos da água residual na morfologia de B. cereus B1, usando microscopia eletrônica de varredura. Obteve- se uma redução de 100 % em AWW com glicose, de 71 % em AWW sem glicose, de 75.6 % em RWW com glicose e de 31.7 % em RWW sem glicose. A pesar do baixo percentual de redução obtido em RWW sem glicose, alcançaram-se concentrações de ± 0.14 mg/L de Cr6+, que estão dentro dos limites permitidos (0.5 mg/L de Cr6+). A microscopia eletrônica de varredura mostrou alterações na parede da célula bacteriana e uma diminuição no tamanho, principalmente nas bactérias expostas a RWW. Os resultados nos permitiram propor a B. cereus B1 como um microrganismo promissório para o uso em biorremediação de efluentes que contenham Cr6+.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Bioremediation]]></kwd>
<kwd lng="en"><![CDATA[industrial effluents]]></kwd>
<kwd lng="en"><![CDATA[glucose]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
<kwd lng="en"><![CDATA[metal plating.]]></kwd>
<kwd lng="es"><![CDATA[biorremediación]]></kwd>
<kwd lng="es"><![CDATA[efluentes industriales]]></kwd>
<kwd lng="es"><![CDATA[glucosa]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[galvanoplastia]]></kwd>
<kwd lng="pt"><![CDATA[biorremediação]]></kwd>
<kwd lng="pt"><![CDATA[efluentes industriais]]></kwd>
<kwd lng="pt"><![CDATA[glicose]]></kwd>
<kwd lng="pt"><![CDATA[metais pesados]]></kwd>
<kwd lng="pt"><![CDATA[galvanoplastia]]></kwd>
</kwd-group>
</article-meta>
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