<?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>0121-1129</journal-id>
<journal-title><![CDATA[Revista Facultad de Ingeniería]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Fac. ing.]]></abbrev-journal-title>
<issn>0121-1129</issn>
<publisher>
<publisher-name><![CDATA[Universidad Pedagógica y Tecnológica de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-11292020000100017</article-id>
<article-id pub-id-type="doi">10.19053/01211129.v29.n54.2020.10477</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Optimization of the Effect of Temperature and Bed Height on Cr (VI) Bioadsorption in Continuous System]]></article-title>
<article-title xml:lang="es"><![CDATA[Optimización del efecto de la temperatura y altura del lecho en la bioadsorción de Cr (VI) en sistema continuo]]></article-title>
<article-title xml:lang="pt"><![CDATA[Otimização do efeito da temperatura e da altura do leito na bioadsorção de Cr (VI) em um sistema contínuo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villabona-Ortiz]]></surname>
<given-names><![CDATA[Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tejada-Tovar]]></surname>
<given-names><![CDATA[Candelaria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ruiz-Paternina]]></surname>
<given-names><![CDATA[Erika]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Frías-González]]></surname>
<given-names><![CDATA[Jesús-David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Blanco-García]]></surname>
<given-names><![CDATA[Gerlyn-David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>29</volume>
<numero>54</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-11292020000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-11292020000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-11292020000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In the present paper, the residues of the plantain starch extraction process are proposed as an adsorbent to remove Cr (VI) in a continuous fixed bed-system, varying the temperature in 33, 40, 55, 70 y 76 °C and bed height in the range of 15.5, 30, 65, 100, 114.5 mm. The adsorbent material was characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and X-ray Diffraction Analysis (XRD). The Cr (VI) solution at 100 ppm had contact with the column by gravity, with a flow rate of 0.75 mL/s at the different working conditions. At the end of the process, the residual concentration of the metal was measured by UV-Vis spectroscopy using the standard method for the determination of Cr (VI) in water ASTM D1687-17. From the results, it was established that the bioadsorbent has the presence of hydroxyl, carboxyl and methyl functional groups and that the adsorption process is controlled by electrostatic interactions; the variables evaluated had a significant influence on the process because applying the RSM methodology it was observed that the optimal operating conditions are 81.49 mm of bed height and temperature of 68 ºC. Based on the behavior of the rupture curve, it was found that the bio-material has the potential to be used as a filler in an adsorption column with the purpose of remove Cr (VI).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En el presente artículo se propone como adsorbentes residuos del proceso de extracción de almidón de plátano para remover Cr (VI) en un sistema continuo de lecho fijo, variando la temperatura 33, 40, 55, 70 y 76 °C y altura de lecho en el rango de 15.5, 30, 65, 100, 114.5 mm. El material adsorbente fue caracterizado mediante espectroscopia infrarroja por transformada de Fourier (FTIR), Microscopia Electrónica de Barrido (SEM) y análisis por difracción de rayos X (DRX). La solución de Cr (VI) a 100 ppm tuvo contacto con la columna por gravedad, con un caudal de 0.75 mL/s a las diferentes condiciones trabajadas. Al final del proceso la concentración residual del metal fue medida mediante espectroscopia UV-Vis usando el método estándar para la determinación de Cr (VI) en agua ASTM D1687-17. De los resultados, se estableció que el bioadsorbente cuenta con la presencia de grupos funcionales hidroxilo, carboxilo y metilo, y que el proceso de adsorción está controlado por interacciones electrostáticas; las variables evaluadas incidieron de forma significativa en el proceso, estableciendo al aplicar la metodología RSM que las condiciones óptimas de operación son 81.49 mm de altura de lecho y temperatura de 68 ºC. Del comportamiento de la curva de ruptura se encontró que el bio-material tiene potencial para ser usado como relleno en una columna de adsorción con el fin de remover Cr (VI).]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Este artigo propõe como resíduos adsorventes do processo de extração de amido de banana a remoção de Cr (VI) em um sistema contínuo de leito fixo, variando a temperatura 33, 40, 55, 70 e 76 ° C e a altura do leito em a faixa de 15,5, 30, 65, 100, 114,5 mm. O material adsorvente foi caracterizado por espectroscopia no infravermelho por transformada de Fourier (FTIR), microscopia eletrônica de varredura (MEV) e análise de difração de raios X (DRX). A solução de Cr (VI) a 100 ppm teve contato com a coluna por gravidade, com vazão de 0,75 mL / s nas diferentes condições trabalhadas. No final do processo, a concentração residual de metal foi medida por espectroscopia UV-Vis usando o método padrão para a determinação de Cr (VI) em água ASTM D1687-17. A partir dos resultados, foi estabelecido que o bioadsorvente tem a presença de grupos funcionais hidroxil, carboxil e metil, e que o processo de adsorção é controlado por interações eletrostáticas; as variáveis avaliadas tiveram impacto significativo no processo, estabelecendo, aplicando a metodologia RSM, que as condições operacionais ideais são 81,49 mm de altura do leito e temperatura de 68 ºC. A partir do comportamento da curva de ruptura, verificou-se que o biomaterial tem potencial para ser utilizado como carga em uma coluna de adsorção, a fim de remover o Cr (VI).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[bioadsorption]]></kwd>
<kwd lng="en"><![CDATA[continuous system]]></kwd>
<kwd lng="en"><![CDATA[heavy metal]]></kwd>
<kwd lng="en"><![CDATA[residual biomass]]></kwd>
<kwd lng="es"><![CDATA[bioadsorción]]></kwd>
<kwd lng="es"><![CDATA[biomasa residual]]></kwd>
<kwd lng="es"><![CDATA[metal pesado]]></kwd>
<kwd lng="es"><![CDATA[sistema continuo]]></kwd>
<kwd lng="pt"><![CDATA[bioadsorção]]></kwd>
<kwd lng="pt"><![CDATA[biomassa residual]]></kwd>
<kwd lng="pt"><![CDATA[metal pesado]]></kwd>
<kwd lng="pt"><![CDATA[sistema contínuo]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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