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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleRemoval of Mn(II) and Cd(II) from wastewaters by natural and modified clayspt_BR
dc.contributor.authorDal Bosco, SMpt_BR
dc.contributor.authorJimenez, RSpt_BR
dc.contributor.authorVignado, Cpt_BR
dc.contributor.authorFontana, Jpt_BR
dc.contributor.authorGeraldo, Bpt_BR
dc.contributor.authorFigueiredo, FCApt_BR
dc.contributor.authorMandelli, Dpt_BR
dc.contributor.authorCarvalho, WApt_BR
unicamp.author.emailwagneracr@puc-campinas.edu.brpt_BR
unicamp.authorPontificia Univ Catolica Campinas, Ctr Ciencias Exatas Ambientais & Tecnol, Fac Quim, BR-13086900 Campinas, SP, Brazil Univ Estadual Campinas, Fac Engn Quim, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subjectmodified clayspt_BR
dc.subjectBrazilian claypt_BR
dc.subjecttoxic metalspt_BR
dc.subjectadsorption isothermpt_BR
dc.subjectwastewaterpt_BR
dc.subjectheavy metalspt_BR
dc.subject.wosHeavy-metal Removalpt_BR
dc.subject.wosIon-exchangept_BR
dc.subject.wosWaste-waterpt_BR
dc.subject.wosSorptionpt_BR
dc.subject.wosMontmorillonitept_BR
dc.subject.wosKineticspt_BR
dc.subject.wosCopperpt_BR
dc.subject.wosAdsorptionpt_BR
dc.subject.wosExtractionpt_BR
dc.subject.wosMineralspt_BR
dc.description.abstractThe adsorption capacities of commercial and Brazilian natural clays were evaluated to test their applications in wastewater control. We investigated the process of sorption of manganese(II) and cadmium(II) present in synthetic aqueous effluents, by calculating the adsorption isotherms at 298 K using batch experiments. The influence of temperature and pH on the adsorption process was also studied. Adsorption of metals was best described by a Langmuir isotherm, with values of Q(0) parameter, which is related to the sorption capacity, corresponding to 6.3 mg g(-1) for K-10/Cd(II), 4.8 mg g(-1) for K-10/Mn(II), 11.2 mg g(-1) for NT-25/Cd(II) and 6.0 mg g(-1) for NT-25/Mn(II). We observed two distinct adsorption mechanisms that may influence adsorption. At the first 5 min of interaction, a cation exchange mechanism that takes place at exchange sites located on (001) basal planes is predominant. This process is inhibited by low pH values. After this first and fast step, a second sorption mechanism can be related to formation of inner-sphere surface complexes, which is formed at edges of the clay. The rate constants and the initial sorption rates correlate positively with temperature in all studied systems, denoting the predominance of a physisorption process. The addition of complexing agents that are incorporated within the K10 structure, enhance metal uptake by the adsorbent. The results have shown that both Cd(II) and Mn(II) were totally retained from a 50 mg L-1 solution when K10 grafted with ammonium pyrrolidinedithiocarbamate (APDC) was used as adsorbent.pt
dc.relation.ispartofAdsorption-journal Of The International Adsorption Societypt_BR
dc.relation.ispartofabbreviationAdsorpt.-J. Int. Adsorpt. Soc.pt_BR
dc.publisher.cityDordrechtpt_BR
dc.publisher.countryHolandapt_BR
dc.publisherSpringerpt_BR
dc.date.issued2006pt_BR
dc.date.monthofcirculationMARpt_BR
dc.identifier.citationAdsorption-journal Of The International Adsorption Society. Springer, v. 12, n. 2, n. 133, n. 146, 2006.pt_BR
dc.language.isoenpt_BR
dc.description.volume12pt_BR
dc.description.issuenumber2pt_BR
dc.description.firstpage133pt_BR
dc.description.lastpage146pt_BR
dc.rightsfechadopt_BR
dc.rights.licensehttp://www.springer.com/open+access/authors+rights?SGWID=0-176704-12-683201-0pt_BR
dc.sourceWeb of Sciencept_BR
dc.identifier.issn0929-5607pt_BR
dc.identifier.wosidWOS:000241789400003pt_BR
dc.identifier.doi10.1007/s10450-006-0375-1pt_BR
dc.date.available2014-11-19T08:46:24Z
dc.date.available2015-11-26T18:01:35Z-
dc.date.accessioned2014-11-19T08:46:24Z
dc.date.accessioned2015-11-26T18:01:35Z-
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dc.description.provenanceMade available in DSpace on 2015-11-26T18:01:35Z (GMT). No. of bitstreams: 2 WOS000241789400003.pdf: 598110 bytes, checksum: d9cced50723983004371ed606793616a (MD5) WOS000241789400003.pdf.txt: 42797 bytes, checksum: 42af1bf34d28e32f7a15e8180ef3cf2e (MD5) Previous issue date: 2006en
dc.identifier.urihttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/70891pt_BR
dc.identifier.urihttp://www.repositorio.unicamp.br/handle/REPOSIP/70891
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/70891-
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