<?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>0188-4999</journal-id>
<journal-title><![CDATA[Revista internacional de contaminación ambiental]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Int. Contam. Ambient]]></abbrev-journal-title>
<issn>0188-4999</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias de la Atmósfera y Cambio Climático]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-49992020000401011</article-id>
<article-id pub-id-type="doi">10.20937/rica.53532</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[SÍNTESIS Y CARACTERIZACIÓN DE ALÚMINAS DE TRANSICIÓN A PARTIR DE DESECHOS DE ALUMINIO RECICLADO]]></article-title>
<article-title xml:lang="en"><![CDATA[SYNTHESIS AND CHARACTERIZATION OF TRANSITION ALUMINAS FROM RECYCLED SCRAP ALUMINIUM]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[Rosa María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Campos]]></surname>
<given-names><![CDATA[Delia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Saab]]></surname>
<given-names><![CDATA[Elvira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Labrador]]></surname>
<given-names><![CDATA[Norberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hung]]></surname>
<given-names><![CDATA[Xavier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palma]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Metropolitana Departamento de Química ]]></institution>
<addr-line><![CDATA[Caracas ]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Simón Bolívar  ]]></institution>
<addr-line><![CDATA[Caracas ]]></addr-line>
<country>Venezuela</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>36</volume>
<numero>4</numero>
<fpage>1011</fpage>
<lpage>1018</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-49992020000401011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-49992020000401011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-49992020000401011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El objetivo de este estudio fue desarrollar una metodología alterna para sintetizar alúminas de transición, partiendo de aluminio reciclado como materia prima (latas de bebidas gaseosas), a fin de disminuir los efectos ecológicos de este tipo de desecho y generar un producto de alto valor agregado. Con el método de síntesis implementado se obtiene un precursor conformado en un 55.4 % por bayerita, 41.2 % por bohemita y el resto por sal de amonio, de acuerdo con los estudios de rayos X realizados y la cuantificación por el método de Rietveld. La sal cloruro de amonio generada no es relevante para el proceso manejado, ya que su alta solubildad en agua permite eliminarla por lavados sucesivos. Estudios realizados por microscopia electrónica de barrido muestran la presencia de partículas aglomeradas con tamaños de 50 a 300 &#956;m. Utilizando ensayos de granulometría laser, se determinó una distribución bimodal del tamaño de grano. El análisis térmico indicó una pérdida de masa del 40.6 % en peso respecto de la muestra inicial del precursor al llevar la muestra a temperaturas cercana a los 1000 ºC. Tratamientos térmicos a 350 y 750 ºC realizados al precipitado obtenido, manteniendo la temperatura durante 1, 2 y 4 h, permitieron obtener varias alúminas de transición (&#947;, &#951;, &#952;), que son productos con valor agregado que tienen usos potenciales como aglutinantes para refractarios monolíticos, soportes catalíticos o aditivos como materiales puzolánicos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The aim of this study was to develop an alternative methodology for the synthesis of transition aluminas, in order to reduce ecological costs by using recycled metal scrap as raw material (cans of soft drinks) and generate a product with high added value. The synthesis technique employed yielded a precursor comprised of 55.4 % of bayerite, 41.2 % of boehmite, and ammonium salt, according the characterization performed with X-ray diffraction and quantification by the Rietveld method. The ammonium chloride salt present is not relevant for the process, since given its solubility in water, it could be eliminated by successive washing. Scanning electron microscopy evaluations showed the presence of agglomerates of particles between 50 and 300 &#956;m. A bimodal grain sizes distribution was detected during the laser granulometric test. Thermogravimetric analysis of the precursor indicated a 40.6 % total weight loss at 1000 ºC. The heat treatments at 350 and 750 ºC of precipitates for 1, 2 and 4 h, produced various transition aluminas (&#947;, &#951;, &#952;), which are products where value has been added and might have a potential use as binders in monolithic products, catalyst support, or additives for puzzolanic materials, among others.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[cans]]></kwd>
<kwd lng="en"><![CDATA[binder]]></kwd>
<kwd lng="en"><![CDATA[raw material]]></kwd>
<kwd lng="es"><![CDATA[latas]]></kwd>
<kwd lng="es"><![CDATA[aglutinante]]></kwd>
<kwd lng="es"><![CDATA[materia prima]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Adans]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Coelho]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Das Virgens]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ballarini]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A simple way to produce &#947;-alumina from aluminium cans by precipitation reactions]]></article-title>
<source><![CDATA[Mater. Res]]></source>
<year>2016</year>
<volume>19</volume>
<numero>5</numero>
<issue>5</issue>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ahmedzeki]]></surname>
<given-names><![CDATA[N.S.]]></given-names>
</name>
<name>
<surname><![CDATA[Hussein]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Abdulnabi]]></surname>
<given-names><![CDATA[W.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Recycling waste cans to nano gamma alumina: Effect of the calcination temperature and pH]]></article-title>
<source><![CDATA[Int. J. Curr. Eng. Technol.]]></source>
<year>2017</year>
<volume>7</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>82-8</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alphonse]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Courty]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Structure and thermal behavior of nanocrystalline boehmite]]></article-title>
<source><![CDATA[Thermochim. Acta.]]></source>
<year>2005</year>
<volume>425</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>75-89</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<collab>COVENIN</collab>
<article-title xml:lang=""><![CDATA[Norma Venezolana COVENIN-2352-86. Aluminio y sus aleaciones. Hoja delgada para la fabricación de envases semirigido]]></article-title>
<source><![CDATA[Comité Técnico de Normalización CT8, Materiales Metálicos no Ferrosos, Subcomité Técnico SC1 Aluminio y sus Aleaciones. Comisión Venezolana de Normas Industriales, 10 de junio]]></source>
<year>1986</year>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Souza Santos]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[De Souza Santos]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[De Freitas Neves]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sobre o envelhecimento em meio aquoso de precipitados de hidróxidos de aluminío tendo dimensoes cooidais]]></article-title>
<source><![CDATA[Cerâmica]]></source>
<year>1990</year>
<volume>36</volume>
<page-range>120-6</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Souza Santos]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Souza Santos]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Toledo]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Standard transition aluminas]]></article-title>
<source><![CDATA[Electron microscopy studies. Mater. Res.]]></source>
<year>2000</year>
<volume>3</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>104-14</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dwivedi]]></surname>
<given-names><![CDATA[R.K.]]></given-names>
</name>
<name>
<surname><![CDATA[Gowda]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermal stability of aluminium oxides prepared from gel]]></article-title>
<source><![CDATA[J. Mater. Sci. Lett.]]></source>
<year>1985</year>
<volume>4</volume>
<page-range>331-4</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="">
<collab>Iesmat</collab>
<source><![CDATA[Tecnologías granulométricas]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gonzalo]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Obtención y caracterización de bohemita a partir de un resíduo peligroso de la industria del aluminio]]></source>
<year>2008</year>
<page-range>57</page-range><publisher-loc><![CDATA[Madrid, Spain ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Ciencias Geológicas, Universidad Complutense de Madrid]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[W.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Moore]]></surname>
<given-names><![CDATA[R.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evolution of in situ refractories in the 20th century]]></article-title>
<source><![CDATA[J. Am. Ceramic. Soc.]]></source>
<year>1998</year>
<volume>81</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1385-410</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lefévre]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Duc]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Lepeut]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Caplain]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Fédoroff]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hydration of &#947;-alumina in water and its effects on surface reactivity]]></article-title>
<source><![CDATA[Langmuir]]></source>
<year>2002</year>
<volume>18</volume>
<numero>20</numero>
<issue>20</issue>
<page-range>7530-7</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levin]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Brandon]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Metastable alumina polymorphs: Crystal structures and transition sequences]]></article-title>
<source><![CDATA[J. Am. Ceram. Soc.]]></source>
<year>1998</year>
<volume>81</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1995-2012</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Razo]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Synthesis of alfa-Al2O3 from aluminium cans by wet-chemical methods]]></article-title>
<source><![CDATA[Results in Physics]]></source>
<year>2018</year>
<volume>11</volume>
<page-range>1075-9</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mahinroosta]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Allahverdi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Enhanced alumina recovery from secondary aluminium dross for high purity nanostructured gamma-alumina powder production: Kinetic study]]></article-title>
<source><![CDATA[J. Environ. Manage.]]></source>
<year>2018</year>
<volume>212</volume>
<page-range>278-91</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mahinroosta]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Allahverdi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A promising green process for synthesis of high purity activated-alumina nanopowder from secondary aluminium dross]]></article-title>
<source><![CDATA[J. Clean. Prod.]]></source>
<year>2018</year>
<volume>179</volume>
<page-range>93-102</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Meshram]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Kumar]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Recovery of valuable products from hazardous aluminium dross]]></article-title>
<source><![CDATA[Resour. Conserv. Recy.]]></source>
<year>2018</year>
<numero>130</numero>
<issue>130</issue>
<page-range>95-108</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sato]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermal transformation of alumina trihydrate, bayerite]]></article-title>
<source><![CDATA[J. Appl. Chem.]]></source>
<year>1962</year>
<volume>12</volume>
<page-range>553-6</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sato]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The thermal transformation of alumina monohydrate, boehmite]]></article-title>
<source><![CDATA[J. Appl. Chem.]]></source>
<year>2007</year>
<volume>12</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>9-12</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schlesinger]]></surname>
<given-names><![CDATA[M.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aluminium recycling]]></source>
<year>2007</year>
<edition>2nd.</edition>
<page-range>282</page-range><publisher-loc><![CDATA[Portland, USA ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Varadan]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A critical role of pH in the colloidal synthesis and phase transformation of nano size a-Al2O3 with high surface area]]></article-title>
<source><![CDATA[J. Eur. Ceram. Soc.]]></source>
<year>2003</year>
<volume>23</volume>
<page-range>659-66</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Skoog]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[West]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Holler]]></surname>
<given-names><![CDATA[F.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Crouch]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fundamentos de química analítica]]></source>
<year>2005</year>
<edition>8a.</edition>
<page-range>612</page-range><publisher-loc><![CDATA[Mexico City ]]></publisher-loc>
<publisher-name><![CDATA[Cengage Learning]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Smykatz-Kloss]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Differential thermal analysis, application and results in mineralogy]]></source>
<year>1974</year>
<page-range>185</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Springer Verlag, Berlin]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="">
<collab>Vitalis</collab>
<source><![CDATA[Situación ambiental en Venezuela]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[West]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Solid state chemistry and its applications]]></source>
<year>2014</year>
<edition>2nd</edition>
<page-range>582</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[John Wiley and Sons]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Young]]></surname>
<given-names><![CDATA[R.A.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Rietveld method. Oxford Science Publications]]></source>
<year>2002</year>
<page-range>312</page-range><publisher-loc><![CDATA[Oxford, UK ]]></publisher-loc>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
