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  • 1 Chemical Engineering Department, Polytechnic School, University of São Paulo, Sao Paulo, SP Brazil
  • 2 School of Chemistry, Rio de Janeiro Federal University, Rio de Janeiro, RJ Brazil
  • 3 Chemical Institute, University of São Paulo, Sao Paulo, SP Brazil
  • 4 Geosciences Institute, University of São Paulo, Sao Paulo, SP Brazil
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Abstract  

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.

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