<?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>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2011000400004</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Decomposition Kinetics of Argentian Lead Jarosite in NaOH Media]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Patiño]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivera]]></surname>
<given-names><![CDATA[Isauro]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[Martín]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Centro de Investigaciones en Materiales y Metalurgia ]]></institution>
<addr-line><![CDATA[Pachuca Hidalgo]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2011</year>
</pub-date>
<volume>55</volume>
<numero>4</numero>
<fpage>208</fpage>
<lpage>213</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2011000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2011000400004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2011000400004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Argentian lead jarosite was obtained with the maximal dissolution technique, and it was thoroughly characterized. In this work we studied the decomposition kinetics and cyanidation of the argentian lead jarosite in NaOH media. The reaction order and activation energy for the alkaline decomposition are of n = 0.7 and Ea = 101.85 KJmol-1, and of n = 0 and Ea = 109.54 KJmol-1 for the cyanidation process. The global cyanidation process consists of two stages: decomposition reaction followed by the instant cyanidation of the decomposition products.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se obtuvo jarosita de plomo argentífera con la técnica de disolución máxima, la cual se caracterizó exhaustivamente. Se estudia la cinética de descomposición y cianuración de la jarosita de plomo argentífera en medio NaOH. El orden de reacción y energía de activación para la descomposición alcalina fueron de n = 0.7 y Ea = 101.85 KJmol-1 respectivamente, mientras que para la cianuración fueron de n = 0 y Ea = 109.54 KJmol-1. El proceso global de cianuración consiste en dos etapas: reacción de descomposición, seguida de la cianuración instantánea de los productos de descomposición.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Kinetics]]></kwd>
<kwd lng="en"><![CDATA[decomposition]]></kwd>
<kwd lng="en"><![CDATA[argentian]]></kwd>
<kwd lng="en"><![CDATA[lead]]></kwd>
<kwd lng="en"><![CDATA[jarosite]]></kwd>
<kwd lng="en"><![CDATA[cyanidation]]></kwd>
<kwd lng="en"><![CDATA[alkaline]]></kwd>
<kwd lng="es"><![CDATA[Cinética]]></kwd>
<kwd lng="es"><![CDATA[descomposición]]></kwd>
<kwd lng="es"><![CDATA[argentífera]]></kwd>
<kwd lng="es"><![CDATA[plomo]]></kwd>
<kwd lng="es"><![CDATA[jarosita]]></kwd>
<kwd lng="es"><![CDATA[cianuración]]></kwd>
<kwd lng="es"><![CDATA[alcalino]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Article</font></p>     <p align="justify"><font face="verdana" size="4">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Decomposition Kinetics of Argentian Lead Jarosite in NaOH Media</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Francisco Pati&ntilde;o,* Iv&aacute;n Reyes, Isauro Rivera, Mart&iacute;n Reyes, Juan Hern&aacute;ndez, and Miguel P&eacute;rez</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Centro de Investigaciones en Materiales y Metalurgia, Universidad Aut&oacute;noma del Estado de Hidalgo, Carretera Pachuca&#150;Tulancingo S/N, km. 4.5, Col. Carboneras, 42074, Pachuca, Hidalgo, M&eacute;xico.</i> <a href="mailto:franpac@infosel.net.mx">franpac@infosel.net.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Received January 12, 2011.    <br> Accepted July 12, 2011.</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Argentian lead jarosite was obtained with the maximal dissolution technique, and it was thoroughly characterized. In this work we studied the decomposition kinetics and cyanidation of the argentian lead jarosite in NaOH media. The reaction order and activation energy for the alkaline decomposition are of <i>n </i>= 0.7 and <i>Ea </i>= 101.85 KJmol<sup>&#150;1</sup>, and of <i>n </i>= 0 and <i>Ea </i>= 109.54 KJmol<sup>&#150;1</sup> for the cyanidation process. The global cyanidation process consists of two stages: decomposition reaction followed by the instant cyanidation of the decomposition products.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b>Kinetics, decomposition, argentian, lead, jarosite, cyanidation, alkaline.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">Se obtuvo jarosita de plomo argent&iacute;fera con la t&eacute;cnica de disoluci&oacute;n m&aacute;xima, la cual se caracteriz&oacute; exhaustivamente. Se estudia la cin&eacute;tica de descomposici&oacute;n y cianuraci&oacute;n de la jarosita de plomo argent&iacute;fera en medio NaOH. El orden de reacci&oacute;n y energ&iacute;a de activaci&oacute;n para la descomposici&oacute;n alcalina fueron de <i>n </i>= 0.7 y <i>Ea </i>= 101.85 KJmol<sup>&#150;1</sup> respectivamente, mientras que para la cianuraci&oacute;n fueron de <i>n </i>= 0 y <i>Ea </i>= 109.54 KJmol<sup>&#150;1</sup>. El proceso global de cianuraci&oacute;n consiste en dos etapas: reacci&oacute;n de descomposici&oacute;n, seguida de la cianuraci&oacute;n instant&aacute;nea de los productos de descomposici&oacute;n. </font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b>Cin&eacute;tica, descomposici&oacute;n, argent&iacute;fera, plomo, jarosita, cianuraci&oacute;n, alcalino.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/jmcs/v55n4/v55n4a4.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     ]]></body>
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<ref-list>
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