Silylation Of Leached-vermiculites Following Reaction With Imidazole And Copper Sorption Behavior.

dc.creatorSantos, Saloana S G
dc.creatorPereira, Mariana B B
dc.creatorAlmeida, Ramon K S
dc.creatorSouza, Antônio G
dc.creatorFonseca, Maria G
dc.creatorJaber, M
dc.date2015-Dec
dc.date2016-05-23T19:39:40Z
dc.date2016-05-23T19:39:40Z
dc.date.accessioned2018-03-29T01:27:20Z
dc.date.available2018-03-29T01:27:20Z
dc.identifierJournal Of Hazardous Materials. v. 306, p. 406-418, 2015-Dec.
dc.identifier1873-3336
dc.identifier10.1016/j.jhazmat.2015.11.042
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/26844783
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/235110
dc.identifier26844783
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1303353
dc.descriptionOrganically modified vermiculites were synthesized by previous silylation of three lixiviated vermiculites, V0.3Cl, V0.5Cl and V0.8Cl, under anhydrous conditions following reaction with imidazole (Im), which acted as chelating agent for copper retention. Elemental analysis, X-ray diffraction, infrared spectroscopy, scanning electronic microscopy, transmission electron microscopy, (29)Si and (13)C NMR and nitrogen adsorption/desorption measurements were used to characterize pristine, lixiviated and organofunctionalized solids. X-ray photoelectron spectroscopy (XPS) was used to evaluate the surface after copper sorption. Parameters such as contact time, pH and initial cation concentration for the adsorption of Cu(II) ions were investigated. The adsorption equilibrium data were fitted using the Langmuir isotherm model and the monolayer adsorption capacities were 2.38, 2.52 and 2.69mmolg(-1) for V0.5Cl-Im, V0.3Cl-Im and V0.8Cl-Im, respectively, at pH 6.0 and 298K for a time reaction of 80min. The sorption rates were described by pseudo-second-order kinetics. The chloropropyl imidazole vermiculites are promising adsorbents for the rapid removal of Cu(II) ions from aqueous solution.
dc.description306
dc.description406-418
dc.languageeng
dc.relationJournal Of Hazardous Materials
dc.relationJ. Hazard. Mater.
dc.rightsembargo
dc.sourcePubMed
dc.subjectCopper Sorption
dc.subjectHybrid Material
dc.subjectSilylated Clay
dc.subjectVermiculite
dc.titleSilylation Of Leached-vermiculites Following Reaction With Imidazole And Copper Sorption Behavior.
dc.typeArtículos de revistas


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