Two-stage Batch Adsorber Design: A Time-Dependent Langmuir Model for Adsorption of Pb²⁺ and Cd²⁺ onto Modified Kaolinite Clay
The kinetics of the adsorption of Pb²⁺ and Cd²⁺ by sodium tetraborate (NTB)-modified kaolinite clay adsorbent was studied. A one-stage and two-stage optimization of equilibrium data were carried out using the Langmuir and time-dependent Langmuir models, respectively. Increasing temperature was found...
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| Veröffentlicht in: | Water, air, and soil pollution air, and soil pollution, 2009-06, Vol.200 (1-4), p.133-145 |
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| creator | Unuabonah, E. I Adebowale, K. O Ofomaja, A. E |
| description | The kinetics of the adsorption of Pb²⁺ and Cd²⁺ by sodium tetraborate (NTB)-modified kaolinite clay adsorbent was studied. A one-stage and two-stage optimization of equilibrium data were carried out using the Langmuir and time-dependent Langmuir models, respectively. Increasing temperature was found to increase the pseudo-second order kinetic rate constant and kinetic data for Pb²⁺ adsorption were found to fit well with the pseudo-second order kinetic model (PSOM) while that for Cd²⁺ were found to show very good fit to the modified pseudo-first order kinetic model (MPFOM). Binary solutions of Pb²⁺ and Cd²⁺ reduced the adsorption capacity of the modified adsorbent for either metal ion with increased initial sorption rate due to competition of metal ions for available adsorption sites. The use of NTB-modified kaolinite clay adsorbent reduces by approximately 72.2% and 96.3% the amount of kaolinite clay needed to adsorb Pb²⁺ and Cd²⁺ from wastewater solutions. From the two-stage batch adsorber design study, the minimum operating time to determine a specified amount of Pb²⁺ and Cd²⁺ removal was developed. The two-stage batch adsorption process predicted less than half the minimum contact time to reach equilibrium in the one-stage process for the adsorption of Pb²⁺ and Cd²⁺ by NTB-modified kaolinite clay adsorbent and requires 0.05 times the mass of the adsorbent for the single-stage batch adsorption at the same operating conditions. |
| doi_str_mv | 10.1007/s11270-008-9899-1 |
| format | Article |
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The use of NTB-modified kaolinite clay adsorbent reduces by approximately 72.2% and 96.3% the amount of kaolinite clay needed to adsorb Pb²⁺ and Cd²⁺ from wastewater solutions. From the two-stage batch adsorber design study, the minimum operating time to determine a specified amount of Pb²⁺ and Cd²⁺ removal was developed. The two-stage batch adsorption process predicted less than half the minimum contact time to reach equilibrium in the one-stage process for the adsorption of Pb²⁺ and Cd²⁺ by NTB-modified kaolinite clay adsorbent and requires 0.05 times the mass of the adsorbent for the single-stage batch adsorption at the same operating conditions.</description><identifier>ISSN: 0049-6979</identifier><identifier>EISSN: 1573-2932</identifier><identifier>DOI: 10.1007/s11270-008-9899-1</identifier><identifier>CODEN: WAPLAC</identifier><language>eng</language><publisher>Dordrecht: Dordrecht : Springer Netherlands</publisher><subject>Adsorbents ; Adsorption ; Applied sciences ; Atmospheric Protection/Air Quality Control/Air Pollution ; Cadmium ; Clay ; Climate Change/Climate Change Impacts ; competition ; Design ; Earth and Environmental Science ; Environment ; Environmental monitoring ; equations ; Equilibrium ; Exact sciences and technology ; General purification processes ; Hydrogeology ; Kaolinite ; Kinetics ; Lead ; mathematical models ; Metal ions ; Metals ; Microscopy ; Optimization ; Pollution ; reaction kinetics ; Sodium ; Sodium tetraborate ; Soil contaminants ; Soil contamination ; Soil Science & Conservation ; Sorption ; Studies ; Temperature ; Wastewater ; wastewater treatment ; Wastewaters ; Water Quality/Water Pollution ; Water treatment and pollution</subject><ispartof>Water, air, and soil pollution, 2009-06, Vol.200 (1-4), p.133-145</ispartof><rights>Springer Science+Business Media B.V. 2008</rights><rights>2009 INIST-CNRS</rights><rights>Springer Science+Business Media B.V. 2009</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c330t-e600055a4c36e1de904bd1750762fdb5a38938450398ec8018f49a4aac1c9efe3</citedby><cites>FETCH-LOGICAL-c330t-e600055a4c36e1de904bd1750762fdb5a38938450398ec8018f49a4aac1c9efe3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s11270-008-9899-1$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s11270-008-9899-1$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27915,27916,41479,42548,51310</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21473423$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Unuabonah, E. I</creatorcontrib><creatorcontrib>Adebowale, K. O</creatorcontrib><creatorcontrib>Ofomaja, A. E</creatorcontrib><title>Two-stage Batch Adsorber Design: A Time-Dependent Langmuir Model for Adsorption of Pb²⁺ and Cd²⁺ onto Modified Kaolinite Clay</title><title>Water, air, and soil pollution</title><addtitle>Water Air Soil Pollut</addtitle><description>The kinetics of the adsorption of Pb²⁺ and Cd²⁺ by sodium tetraborate (NTB)-modified kaolinite clay adsorbent was studied. A one-stage and two-stage optimization of equilibrium data were carried out using the Langmuir and time-dependent Langmuir models, respectively. Increasing temperature was found to increase the pseudo-second order kinetic rate constant and kinetic data for Pb²⁺ adsorption were found to fit well with the pseudo-second order kinetic model (PSOM) while that for Cd²⁺ were found to show very good fit to the modified pseudo-first order kinetic model (MPFOM). Binary solutions of Pb²⁺ and Cd²⁺ reduced the adsorption capacity of the modified adsorbent for either metal ion with increased initial sorption rate due to competition of metal ions for available adsorption sites. The use of NTB-modified kaolinite clay adsorbent reduces by approximately 72.2% and 96.3% the amount of kaolinite clay needed to adsorb Pb²⁺ and Cd²⁺ from wastewater solutions. From the two-stage batch adsorber design study, the minimum operating time to determine a specified amount of Pb²⁺ and Cd²⁺ removal was developed. The two-stage batch adsorption process predicted less than half the minimum contact time to reach equilibrium in the one-stage process for the adsorption of Pb²⁺ and Cd²⁺ by NTB-modified kaolinite clay adsorbent and requires 0.05 times the mass of the adsorbent for the single-stage batch adsorption at the same operating conditions.</description><subject>Adsorbents</subject><subject>Adsorption</subject><subject>Applied sciences</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Cadmium</subject><subject>Clay</subject><subject>Climate Change/Climate Change Impacts</subject><subject>competition</subject><subject>Design</subject><subject>Earth and Environmental Science</subject><subject>Environment</subject><subject>Environmental monitoring</subject><subject>equations</subject><subject>Equilibrium</subject><subject>Exact sciences and technology</subject><subject>General purification processes</subject><subject>Hydrogeology</subject><subject>Kaolinite</subject><subject>Kinetics</subject><subject>Lead</subject><subject>mathematical models</subject><subject>Metal ions</subject><subject>Metals</subject><subject>Microscopy</subject><subject>Optimization</subject><subject>Pollution</subject><subject>reaction kinetics</subject><subject>Sodium</subject><subject>Sodium tetraborate</subject><subject>Soil contaminants</subject><subject>Soil contamination</subject><subject>Soil Science & Conservation</subject><subject>Sorption</subject><subject>Studies</subject><subject>Temperature</subject><subject>Wastewater</subject><subject>wastewater treatment</subject><subject>Wastewaters</subject><subject>Water Quality/Water Pollution</subject><subject>Water treatment and pollution</subject><issn>0049-6979</issn><issn>1573-2932</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kc2KFDEUhQtRsB19AFcGQXfRm0qqkrhre_zDFgV71iGdumkzVCdtUo3MUnwjly59FJ_ENDUouPBuciHfOZzLaZr7DJ4wAPm0MNZKoACKaqU1ZTeaBeskp63m7c1mASA07bXUt5s7pVxCHa3kovm2-ZJomewOyXM7uU9kOZSUt5jJOZawi8_IkmzCHuk5HjAOGCeytnG3P4ZM3qUBR-JTnkWHKaRIkicftj-___r6g9g4kNUw7ylO6SQIPuBA3to0hhgmJKvRXt1tbnk7Frx3_Z41Fy9fbFav6fr9qzer5Zo6zmGi2NfQXWeF4z2yATWI7cBkB7Jv_bDtLFeaK9EB1wqdAqa80FZY65jT6JGfNY9n30NOn49YJrMPxeE42ojpWEwLfSdVLyv48B_wMh1zrNkqo1ivBegKsRlyOZWS0ZtDDnubrwwDc-rEzJ2Y2ok5dWJY1Ty6NrbF2dFnG10of4QtE5KLlleunblSv-IO898A_zN_MIu8TcbucjW--NgC48B63ot612-Weqdo</recordid><startdate>20090601</startdate><enddate>20090601</enddate><creator>Unuabonah, E. 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I</au><au>Adebowale, K. O</au><au>Ofomaja, A. E</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Two-stage Batch Adsorber Design: A Time-Dependent Langmuir Model for Adsorption of Pb²⁺ and Cd²⁺ onto Modified Kaolinite Clay</atitle><jtitle>Water, air, and soil pollution</jtitle><stitle>Water Air Soil Pollut</stitle><date>2009-06-01</date><risdate>2009</risdate><volume>200</volume><issue>1-4</issue><spage>133</spage><epage>145</epage><pages>133-145</pages><issn>0049-6979</issn><eissn>1573-2932</eissn><coden>WAPLAC</coden><abstract>The kinetics of the adsorption of Pb²⁺ and Cd²⁺ by sodium tetraborate (NTB)-modified kaolinite clay adsorbent was studied. A one-stage and two-stage optimization of equilibrium data were carried out using the Langmuir and time-dependent Langmuir models, respectively. Increasing temperature was found to increase the pseudo-second order kinetic rate constant and kinetic data for Pb²⁺ adsorption were found to fit well with the pseudo-second order kinetic model (PSOM) while that for Cd²⁺ were found to show very good fit to the modified pseudo-first order kinetic model (MPFOM). Binary solutions of Pb²⁺ and Cd²⁺ reduced the adsorption capacity of the modified adsorbent for either metal ion with increased initial sorption rate due to competition of metal ions for available adsorption sites. The use of NTB-modified kaolinite clay adsorbent reduces by approximately 72.2% and 96.3% the amount of kaolinite clay needed to adsorb Pb²⁺ and Cd²⁺ from wastewater solutions. From the two-stage batch adsorber design study, the minimum operating time to determine a specified amount of Pb²⁺ and Cd²⁺ removal was developed. The two-stage batch adsorption process predicted less than half the minimum contact time to reach equilibrium in the one-stage process for the adsorption of Pb²⁺ and Cd²⁺ by NTB-modified kaolinite clay adsorbent and requires 0.05 times the mass of the adsorbent for the single-stage batch adsorption at the same operating conditions.</abstract><cop>Dordrecht</cop><pub>Dordrecht : Springer Netherlands</pub><doi>10.1007/s11270-008-9899-1</doi><tpages>13</tpages></addata></record> |
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| ispartof | Water, air, and soil pollution, 2009-06, Vol.200 (1-4), p.133-145 |
| issn | 0049-6979 1573-2932 |
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| source | Springer Nature - Complete Springer Journals |
| subjects | Adsorbents Adsorption Applied sciences Atmospheric Protection/Air Quality Control/Air Pollution Cadmium Clay Climate Change/Climate Change Impacts competition Design Earth and Environmental Science Environment Environmental monitoring equations Equilibrium Exact sciences and technology General purification processes Hydrogeology Kaolinite Kinetics Lead mathematical models Metal ions Metals Microscopy Optimization Pollution reaction kinetics Sodium Sodium tetraborate Soil contaminants Soil contamination Soil Science & Conservation Sorption Studies Temperature Wastewater wastewater treatment Wastewaters Water Quality/Water Pollution Water treatment and pollution |
| title | Two-stage Batch Adsorber Design: A Time-Dependent Langmuir Model for Adsorption of Pb²⁺ and Cd²⁺ onto Modified Kaolinite Clay |
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