Interaction of sodium dodecylbenzenesulfonate with chrysotile fibers. Adsorption or catalysis?

dc.creatorFachini, A
dc.creatorJoekes, I
dc.date2002
dc.date38412
dc.date2014-11-20T03:30:05Z
dc.date2015-11-26T16:04:29Z
dc.date2014-11-20T03:30:05Z
dc.date2015-11-26T16:04:29Z
dc.date.accessioned2018-03-28T22:53:35Z
dc.date.available2018-03-28T22:53:35Z
dc.identifierColloids And Surfaces A-physicochemical And Engineering Aspects. Elsevier Science Bv, v. 201, n. 41699, n. 151, n. 160, 2002.
dc.identifier0927-7757
dc.identifierWOS:000174783800015
dc.identifier10.1016/S0927-7757(01)01034-2
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/60377
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/60377
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/60377
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1265494
dc.descriptionSodium dodecylbenzenesulfonate (SDBS) aqueous solutions in contact with chrysotile fibers show a concentration reduction up to 53% (C-0 = 3.0 x 10(-3) mol 1(-1), above critical micellar concentration (CMC)) and 90% (C-0 = 0.15 x 10-3 moll-1, below CMC) after 4 h contact with the fibers at room temperature, when air bubbling is used as an oxygen supplier. Adsorption/desorption experiments with 3.0 x 10(-3) mol 1(-1) solution show that only 6% of the surfactant is recovered after successive washing steps in water. Experiments in open and closed stirred flasks show that the surfactant depletion is lower. In non-aerated systems, pseudo-equilibrium is achieved after 4 h. When air bubbling is used, the amount of SDBS removed keeps rising at least for 24 h. The calculated Gibbs pseudo-surface concentration indicates the formation of 2-10 monolayers onto the chrysotile surface. These results are inconsistent with a solely adsorptive process. One degradation product was identified and quantified (CO2), rendering a turnover number of 1500. A mechanism for a catalytic process is proposed. (C) 2002 Elsevier Science B.V. All rights reserved.
dc.description201
dc.description41699
dc.description151
dc.description160
dc.languageen
dc.publisherElsevier Science Bv
dc.publisherAmsterdam
dc.publisherHolanda
dc.relationColloids And Surfaces A-physicochemical And Engineering Aspects
dc.relationColloid Surf. A-Physicochem. Eng. Asp.
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectsurfactant degradation
dc.subjectwastewater
dc.subjectSDBS
dc.subjectchrysotile
dc.subjectAsbestos
dc.subjectKaolinite
dc.subjectSurface
dc.subjectSites
dc.titleInteraction of sodium dodecylbenzenesulfonate with chrysotile fibers. Adsorption or catalysis?
dc.typeArtículos de revistas


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