<?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>1692-3561</journal-id>
<journal-title><![CDATA[Biotecnología en el Sector Agropecuario y Agroindustrial]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Bio.Agro]]></abbrev-journal-title>
<issn>1692-3561</issn>
<publisher>
<publisher-name><![CDATA[Taller Editorial Universidad del Cauca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1692-35612012000100017</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[ADSORBENTES A BASE DE CASCARILLA DE ARROZ EN LA RETENCIÓN DE CROMO DE EFLUENTES DE LA INDUSTRIA DE CURTIEMBRES]]></article-title>
<article-title xml:lang="en"><![CDATA[RICE HUSK-BASED ADSORBENTS IN THE REMOVAL OF CHROMIUM FROM TANNING INDUSTRY EFLUENTS]]></article-title>
<article-title xml:lang="pt"><![CDATA[ADSORVENTES A BASE DE CASCA DE ARROZ NA RETENÇÃO DE CROMO DE EFLUENTES DA INDÚSTRIA DE CURTUMES]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RODRÍGUEZ]]></surname>
<given-names><![CDATA[YANSY MILENA]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SALINAS]]></surname>
<given-names><![CDATA[LIZBETH PAOLA]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[RÍOS]]></surname>
<given-names><![CDATA[CARLOS ALBERTO]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[VARGAS]]></surname>
<given-names><![CDATA[LUZ YOLANDA]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Industrial de Santander  ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Geología ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad Industrial de Santander Escuela de Química ]]></institution>
<addr-line><![CDATA[Bucaramanga ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>10</volume>
<numero>1</numero>
<fpage>146</fpage>
<lpage>156</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1692-35612012000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1692-35612012000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1692-35612012000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Diferentes materiales adsorbentes fueron preparados a partir de la cascarilla de arroz (un residuo lignocelulósico agroindustrial), para la remoción de cromo presente en las aguas resultantes de la curtición, debido a su alta toxicidad para la salud humana y a nivel ambiental. La cascarilla de arroz se evaluó como ceniza y carbón activado con acido fosfórico e hidróxido de sodio como agentes activantes. La parte experimental consistió en la calcinación de la cascarilla de arroz, activación química, caracterización, pruebas de adsorción y absorción atómica; obteniendo mejores resultados el adsorbente activado con hidróxido de sodio. Para la activación de la cascarilla de arroz con NaOH se requirió una serie de experimentos para determinar las mejores condiciones de operación en el proceso de obtención del carbón activado. Se obtuvo una mayor remoción en el carbón que se activo a una temperatura de 600°C, un tiempo de activación de 30 minutos y una concentración de la solución de 1&#37; p/p; la remoción de cromo fue del 72,8&#37; comparado con la cascarilla de arroz activada con H3PO4 que fue del 54,5&#37; y la ceniza de cascarilla de arroz 49,2&#37;.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Several adsorbent materials were prepared from rice husk, a lignocellulosic waste from agro-industry, for the removal of chromium present in the effluents of the tanning, due to its high toxicity in the health and to environmental level. The rice husk was evaluated as ash and activated coal with phosphoric acid or hydroxide of sodium as activating agents. The experimental part consisted of calcination of the rice husk, chemical activation, characterization, tests of adsorption and tests of atomic absorption; obtaining better results the adsorbent activated with hydroxide of sodium. The activation of the rice husk with NaOH required a series of experiments to determine the best conditions of operation in the process of obtaining of the activated coal. A major removal was obtained in the coal that was activated at 600°C 30 minutes of activation time and 1&#37; p/p of solution concentration; the removal was of the 72,8 &#37; compared with the rice husk ash activated with H3PO4 that was of the 54,5&#37; and the rice husk ash 49,2&#37;.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Diferentes materiais adsorventes fórum preparados a partir da casca de arroz, um resíduo lignocelulósico agroindustrial, para a remoção de cromo das águas resultantes da curtição, devido a sua alta toxicidade na saúde e ao nível ambiental. A casca de arroz, a qual se avalia como cinza e carvão ativado com acido fosfórico e hidróxido de sódio como agentes ativadores. A parte experimental consta de calcinação da casca de arroz, ativação química, caracterização, testes de adsorção e absorção atômica; obtendo os melhores resultados o adsorvente ativado com hidróxido de sódio. A ativação da casca de arroz com NaOH se precisaram uma série de experimentos para determinar as melhores condições de operação no processo de obtenção do carvão ativado. Obteve-se uma maior remoção no carvão que se ativo a uma temperatura de 600°C, um tempo de ativação de 30 minutos e uma concentração da solução de 1&#37; p/p; a remoção foi do 72,8&#37; comparado com a casca de arroz ativada com H3PO4 que foi do 54,5&#37; e a cinza de casca de arroz 49,2&#37;.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Residuo agroindustrial]]></kwd>
<kwd lng="es"><![CDATA[Activación]]></kwd>
<kwd lng="es"><![CDATA[Adsorción]]></kwd>
<kwd lng="es"><![CDATA[Contaminación]]></kwd>
<kwd lng="es"><![CDATA[Medio ambiente]]></kwd>
<kwd lng="en"><![CDATA[Agroindustrial waste]]></kwd>
<kwd lng="en"><![CDATA[Activation]]></kwd>
<kwd lng="en"><![CDATA[Adsorption]]></kwd>
<kwd lng="en"><![CDATA[Pollution]]></kwd>
<kwd lng="en"><![CDATA[Environment]]></kwd>
<kwd lng="pt"><![CDATA[Resíduo agroindustrial]]></kwd>
<kwd lng="pt"><![CDATA[Ativação]]></kwd>
<kwd lng="pt"><![CDATA[Adsorção]]></kwd>
<kwd lng="pt"><![CDATA[Poluição]]></kwd>
<kwd lng="pt"><![CDATA[Meio ambiente]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  ]]></body><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LEYVA-RAMOS]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[JACOBO-AZUARA]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[DIAZ-FLORES]]></surname>
<given-names><![CDATA[P.E]]></given-names>
</name>
<name>
<surname><![CDATA[GUERRERO-CORONADO]]></surname>
<given-names><![CDATA[R.M]]></given-names>
</name>
<name>
<surname><![CDATA[MENDOZA-BARRON]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[BERBER-MENDOZA]]></surname>
<given-names><![CDATA[M.S]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Adsorption of chromium(VI) from an aqueous solution on a surfactant-modified zeolite]]></article-title>
<source><![CDATA[Colloids Surf. A: Physicochem]]></source>
<year>2008</year>
<volume>330</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>35-41</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[FENG]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[ALDRICH]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[TAN]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Treatment of acid mine water by use of heavy metal precipitation and ion exchange]]></article-title>
<source><![CDATA[Miner. Eng]]></source>
<year>2000</year>
<volume>13</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>623-642</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MOHAMMADI]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[MOHEB]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[SADRZADEH]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[RAZMI]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Modeling of metal ion removal from wastewater by electrodialysis]]></article-title>
<source><![CDATA[Separ. Purif. Technol.]]></source>
<year>2005</year>
<volume>41</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>73-82</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DABROWSKI]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[HUBICKI]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[PODKOSCIELNY]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[ROBENS]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Selective removal of the heavy metal ions from waters and industrial wastewaters by ion-exchange method]]></article-title>
<source><![CDATA[Chemosphere]]></source>
<year>2004</year>
<volume>56</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>91-106</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MOLINARI]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[ARGURIO]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[POERIO]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Studies of various solid membrane supports to prepare stable sandwich liquid membranes and testing copper(II) removal from aqueous media]]></article-title>
<source><![CDATA[Separ. Purif. Technol]]></source>
<year>2009</year>
<volume>70</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>166-172</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[BULUT]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[TEZ]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of heavy metals from aqueous solution by sawdust adsorption]]></article-title>
<source><![CDATA[J. Environ. Sci.]]></source>
<year>2007</year>
<volume>19</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>160-166</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[TAHIR]]></surname>
<given-names><![CDATA[S.S]]></given-names>
</name>
<name>
<surname><![CDATA[NASEEM]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of Cr(III) from tannery wastewater by adsorption onto bentonite clay]]></article-title>
<source><![CDATA[Separ. Purif. Technol.]]></source>
<year>2007</year>
<volume>53</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>312-321</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CHÁVEZ-PORRAS]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang="es"><![CDATA[Descripción de la nocividad del cromo proveniente de la industria de curtiembre y de las posibles formas de removerlo]]></article-title>
<source><![CDATA[Rev. Ing. Universidad de Medellín]]></source>
<year>2010</year>
<volume>9</volume>
<numero>17</numero>
<issue>17</issue>
<page-range>41-49</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="book">
<collab>WHO</collab>
<source><![CDATA[Guidelines for Drinking-Water Quality]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Geneva ]]></publisher-loc>
<publisher-name><![CDATA[World Health Organization]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LEYVA-RAMOS]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[JUAREZ-MARTINEZ]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[GUERRERO-CORONADO]]></surname>
<given-names><![CDATA[R.M]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Adsorption of chromium (VI) from aqueous solutions on activated carbon]]></article-title>
<source><![CDATA[Water Sci. Technol.]]></source>
<year>1994</year>
<volume>30</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>191-197</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LEYVA-RAMOS]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[GUERRERO-CORONADO]]></surname>
<given-names><![CDATA[R.M]]></given-names>
</name>
<name>
<surname><![CDATA[FUENTES-RUBIO]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[MENDOZA-BARRON]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang="es"><![CDATA[Remoción de cromo hexavalente y trivalente de solución acuosa por medio de resinas de intercambio iónico]]></article-title>
<source><![CDATA[Inform. Tecnol.]]></source>
<year>2000</year>
<volume>11</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>93-100</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[RANGANATHAN]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Chromium removal by activated carbons prepared from casurina equisetifolia leaves]]></article-title>
<source><![CDATA[Biores. Technol.]]></source>
<year>2000</year>
<volume>73</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>99-103</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[MOHAN]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[SINGH]]></surname>
<given-names><![CDATA[K.P]]></given-names>
</name>
<name>
<surname><![CDATA[SINGH]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of hexavalent chromium from aqueous solution using low-cost activated carbons derived from agricultural waste materials and activated carbon fabric cloth]]></article-title>
<source><![CDATA[Ind. Eng. Chem. Res.]]></source>
<year>2005</year>
<volume>44</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1027-1042</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[TARASEVICH]]></surname>
<given-names><![CDATA[Y.I]]></given-names>
</name>
<name>
<surname><![CDATA[KLIMOVA]]></surname>
<given-names><![CDATA[G. M]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Complexing Sorbents Based on Dispersed Minerals for Recovery of Heavy Metal Ions from Aqueous Solutions]]></article-title>
<source><![CDATA[Theor. Exp. Chem]]></source>
<year>1999</year>
<volume>35</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>158-161</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PÉREZ-CANDELA]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[MARTÍN-MARTÍNEZ]]></surname>
<given-names><![CDATA[J.M]]></given-names>
</name>
<name>
<surname><![CDATA[TORREGROSA-MACIÁ]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Chromium (VI) Removal with Activated Carbons]]></article-title>
<source><![CDATA[Water Res.]]></source>
<year>1995</year>
<volume>29</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>2174-2180</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[SHARM]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Process Development for the Removal of Lead and Chromium from Aqueous Solutions Using Red Mud-an Aluminum Industry Waste]]></article-title>
<source><![CDATA[Water Res.]]></source>
<year>2001</year>
<volume>35</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1125-1134</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SRIVASTAVA]]></surname>
<given-names><![CDATA[S.K]]></given-names>
</name>
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[MOHAN]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of Lead and Chromium by Activated Slag-A Blast-Furnace Waste]]></article-title>
<source><![CDATA[J. Environ. Eng.]]></source>
<year>1997</year>
<volume>123</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>461-468</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SRIVASTAVA]]></surname>
<given-names><![CDATA[S.K]]></given-names>
</name>
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[MOHAN]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Kinetic Parameters for the Removal of Lead and Chromium from Wastewater using Activated Carbon Developed from Fertilizer Waste Material]]></article-title>
<source><![CDATA[Environ. Model. Assess.]]></source>
<year>1996</year>
<volume>1</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>281-290</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[SRIVASTAVA]]></surname>
<given-names><![CDATA[A.K]]></given-names>
</name>
<name>
<surname><![CDATA[JAIN]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Biosorption of Chromium (VI) from Aqueous Solutions by Green Algae Spirogyra Species]]></article-title>
<source><![CDATA[Water Res.]]></source>
<year>2001</year>
<volume>35</volume>
<numero>17</numero>
<issue>17</issue>
<page-range>4079-4085</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SENG]]></surname>
<given-names><![CDATA[C.E]]></given-names>
</name>
<name>
<surname><![CDATA[LEE]]></surname>
<given-names><![CDATA[C.G]]></given-names>
</name>
<name>
<surname><![CDATA[LIEW]]></surname>
<given-names><![CDATA[K.Y]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Adsorption of Chromium (VI) and Nickel (II) Ions on Acid-and Heat-activated Deoiled Spent Bleaching Clay]]></article-title>
<source><![CDATA[J. Am. Oil Chem. Soc.]]></source>
<year>2001</year>
<volume>78</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>831-835</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[ALI]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of Lead and Chromium from Wastewater using Bagasse Fly Ash-a Sugar Industry Waste]]></article-title>
<source><![CDATA[J. Colloid Interf. Sci.]]></source>
<year>2004</year>
<volume>271</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>321-328</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[KIM]]></surname>
<given-names><![CDATA[K.S]]></given-names>
</name>
<name>
<surname><![CDATA[CHOI]]></surname>
<given-names><![CDATA[H.C]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Characteristics of Adsorption of Rice-hull Activated Carbon]]></article-title>
<source><![CDATA[Water Sci. Technol.]]></source>
<year>1998</year>
<volume>38</volume>
<numero>4-5</numero>
<issue>4-5</issue>
<page-range>95-101</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DUPONT]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[GUILLON]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of hexavalent chromium with a lignocellulosic substrate extracted from wheat bran]]></article-title>
<source><![CDATA[Environ. Sci. Technol.]]></source>
<year>2003</year>
<volume>37</volume>
<numero>18</numero>
<issue>18</issue>
<page-range>4235-4241</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DEAN]]></surname>
<given-names><![CDATA[J.G]]></given-names>
</name>
<name>
<surname><![CDATA[BOSQUI]]></surname>
<given-names><![CDATA[F.L]]></given-names>
</name>
<name>
<surname><![CDATA[LANOUETTE]]></surname>
<given-names><![CDATA[K.H]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removing heavy metals from waste water]]></article-title>
<source><![CDATA[Environ. Sci. Technol.]]></source>
<year>1972</year>
<volume>6</volume>
<page-range>518-522</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUPTA]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
<name>
<surname><![CDATA[JAIN]]></surname>
<given-names><![CDATA[C.K]]></given-names>
</name>
<name>
<surname><![CDATA[ALI]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[SHARMA]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[SAINI]]></surname>
<given-names><![CDATA[V.K]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Removal of cadmium and nickel from wastewater using bagasse fly ash-a sugar industry waste]]></article-title>
<source><![CDATA[Water Res.]]></source>
<year>2003</year>
<volume>37</volume>
<numero>16</numero>
<issue>16</issue>
<page-range>4038-4044</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[RENGARAJ]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[JOO]]></surname>
<given-names><![CDATA[C.K]]></given-names>
</name>
<name>
<surname><![CDATA[KIM]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[YI]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Kinetics of removal of chromium from water and electronic process wastewater by ion exchange resins: 1200H, 1500H and IRN97H]]></article-title>
<source><![CDATA[J. Hazard. Mater.]]></source>
<year>2003</year>
<volume>102</volume>
<numero>2-3</numero>
<issue>2-3</issue>
<page-range>257-275</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[FIERRO]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[MUÑIZ]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[BASTA]]></surname>
<given-names><![CDATA[A. H]]></given-names>
</name>
<name>
<surname><![CDATA[EL-SAIED]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[CELZARD]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Rice straw as precursor of activated carbons: Activation with phosphoric acid]]></article-title>
<source><![CDATA[J. Hazard. Mater.]]></source>
<year>2010</year>
<volume>181</volume>
<numero>1-3</numero>
<issue>1-3</issue>
<page-range>27-34</page-range></nlm-citation>
</ref>
<ref id="B28">
<label>28</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUO]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[YU]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[WANG]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[XU]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Effects of activation conditions on preparation of porous carbon from rice husk]]></article-title>
<source><![CDATA[Carbon]]></source>
<year>2003</year>
<volume>41</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1645-1648</page-range></nlm-citation>
</ref>
<ref id="B29">
<label>29</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[YALÇIN]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[SEVINÇ]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Studies of the surface area and porosity of activated carbons prepared from rice husks]]></article-title>
<source><![CDATA[Carbon]]></source>
<year>2000</year>
<volume>38</volume>
<numero>14</numero>
<issue>14</issue>
<page-range>1943-1945</page-range></nlm-citation>
</ref>
<ref id="B30">
<label>30</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[YALÇIN]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[SEVINÇ]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Studies on silica obtained from rice husk]]></article-title>
<source><![CDATA[Ceram. Int.]]></source>
<year>2001</year>
<volume>27</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>219-224</page-range></nlm-citation>
</ref>
<ref id="B31">
<label>31</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[DELLA]]></surname>
<given-names><![CDATA[V.P]]></given-names>
</name>
<name>
<surname><![CDATA[KÜHN]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[HOTZA]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Rice husk ash as an alternate source for active silica production]]></article-title>
<source><![CDATA[Mater. Let.]]></source>
<year>2002</year>
<volume>57</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>818-821</page-range></nlm-citation>
</ref>
<ref id="B32">
<label>32</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LIOU]]></surname>
<given-names><![CDATA[T.H]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Preparation and characterization of nano-structured silica from rice husk]]></article-title>
<source><![CDATA[Mater. Sci. Eng. A]]></source>
<year>2004</year>
<volume>364</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>313-323</page-range></nlm-citation>
</ref>
<ref id="B33">
<label>33</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ARCOS]]></surname>
<given-names><![CDATA[C.A]]></given-names>
</name>
<name>
<surname><![CDATA[PINTO]]></surname>
<given-names><![CDATA[D.M]]></given-names>
</name>
<name>
<surname><![CDATA[RODRÍGUEZ]]></surname>
<given-names><![CDATA[J.E]]></given-names>
</name>
</person-group>
<article-title xml:lang="es"><![CDATA[La cascarilla de arroz como fuente de SiO2]]></article-title>
<source><![CDATA[Rev. Fac. Ing. Univ. Antioquia]]></source>
<year>2007</year>
<volume>41</volume>
<page-range>7-20</page-range></nlm-citation>
</ref>
<ref id="B34">
<label>34</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[TEXEIRA]]></surname>
<given-names><![CDATA[C.R]]></given-names>
</name>
<name>
<surname><![CDATA[ZEZZI]]></surname>
<given-names><![CDATA[M.A]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[Biosorption of heavy metals using rice milling by-products: Characterisation and application for removal of metals from aqueous effluents]]></article-title>
<source><![CDATA[Chemosphere]]></source>
<year>2004</year>
<volume>54</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>987-995</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
