Journal of Thermal Analysis and Calorimetry

, Volume 100, Issue 3, pp 889–896 | Cite as

Toluene and naphthalene sorption by iron oxide/clay composites

Part I. Materials characterization
  • Marilda M. G. R. Vianna
  • Jo Dweck
  • Frank H. Quina
  • Flavio M. S. Carvalho
  • Claudio A. O. Nascimento


Commercial bentonite (BFN) and organoclay (WS35), as well as iron oxide/clay composite (Mag_BFN) and iron/oxide organoclay composite (Mag_S35) were prepared for toluene and naphthalene sorption. Mag_BFN and Mag_S35 were obtained, respectively, by the precipitation of iron oxide hydrates onto sodium BFN and S35 clay particles. The materials were characterized by powder X-ray diffraction (XRD), X-ray Fluorescence (XRF), and TG and DTA. From XRF results and TG data on calcined mass basis, a quantitative method was developed to estimate the iron compound contents of the composites, as well as the organic matter content present in WS35 and Mag_S35.


Clay Organoclay Iron oxide/clay composites Characterization Thermal analysis 



Commercial bentonite


Benzene, toluene, ethylbenzene, and xylenes


Basal spacing


Differential thermal analysis


Iron oxide/clay composite


Iron/oxide organoclay composite


Calcined mass of sample S


Initial mass of sample S


Nonpolar organic compounds


Polycyclic aromatic hydrocarbons


Unwashed organoclays




Washed organoclay


Powder X-ray diffraction (XRD)


X-ray fluorescence





To the National Institute of Science and Technology for Environmental Studies (INCT-EMA), State of São Paulo Research Foundation (FAPESP), BF Clay Especialidades Lta, X-ray Laboratory, and X-ray Fluorescence Laboratory of the Geosciences Institute of the University of São Paulo.


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2009

Authors and Affiliations

  • Marilda M. G. R. Vianna
    • 1
  • Jo Dweck
    • 2
  • Frank H. Quina
    • 3
  • Flavio M. S. Carvalho
    • 4
  • Claudio A. O. Nascimento
    • 1
  1. 1.Chemical Engineering Department, Polytechnic SchoolUniversity of São PauloSao PauloBrazil
  2. 2.School of ChemistryRio de Janeiro Federal UniversityRio de JaneiroBrazil
  3. 3.Chemical InstituteUniversity of São PauloSao PauloBrazil
  4. 4.Geosciences InstituteUniversity of São PauloSao PauloBrazil

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