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Toluene and naphthalene sorption by iron oxide/clay composites

Part I. Materials characterization

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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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Abbreviations

BFN:

Commercial bentonite

BTEX:

Benzene, toluene, ethylbenzene, and xylenes

d 001 :

Basal spacing

DTA:

Differential thermal analysis

Mag_BFN:

Iron oxide/clay composite

Mag_S35:

Iron/oxide organoclay composite

M cS :

Calcined mass of sample S

M iS :

Initial mass of sample S

NOC:

Nonpolar organic compounds

PAH:

Polycyclic aromatic hydrocarbons

S35:

Unwashed organoclays

TG:

Thermogravimetry

WS35:

Washed organoclay

XRD:

Powder X-ray diffraction (XRD)

XRF:

X-ray fluorescence

γ-Fe2O3 :

Maghemite

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Acknowledgements

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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Authors and Affiliations

  1. Chemical Engineering Department, Polytechnic School, University of São Paulo, Sao Paulo, SP, Brazil

    Marilda M. G. R. Vianna & Claudio A. O. Nascimento

  2. School of Chemistry, Rio de Janeiro Federal University, Rio de Janeiro, RJ, Brazil

    Jo Dweck

  3. Chemical Institute, University of São Paulo, Sao Paulo, SP, Brazil

    Frank H. Quina

  4. Geosciences Institute, University of São Paulo, Sao Paulo, SP, Brazil

    Flavio M. S. Carvalho

Authors
  1. Marilda M. G. R. Vianna
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  2. Jo Dweck
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  5. Claudio A. O. Nascimento
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Correspondence to Marilda M. G. R. Vianna.

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Vianna, M.M.G.R., Dweck, J., Quina, F.H. et al. Toluene and naphthalene sorption by iron oxide/clay composites. J Therm Anal Calorim 100, 889–896 (2010). https://doi.org/10.1007/s10973-009-0427-3

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  • DOI: https://doi.org/10.1007/s10973-009-0427-3

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