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Toluene and naphthalene sorption by iron oxide/clay composites

Part II. Sorption experiments

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Abstract

This study investigates the sorption of toluene and naphthalene by a sodium bentonite (BFN), an organoclay (WS35) and by their respective iron oxide hydrate composites Mag_BFN and Mag_S35. The organic matter content of WS35 and Mag_S35, determined by thermogravimetry, was used to obtain their organic matter sorption coefficients, which show that they are effective sorbents to remove organic contaminants from water, with a higher selectivity for naphthalene than for toluene sorption. The main iron oxide phase present in Mag_BFN and Mag_S35 is maghemite (γ-Fe2O3), which allows these sorbents to be separated from the effluent by a magnetic separation process after use.

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Acknowledgements

Authors acknowledge the National Institute of Science and Technology for Environmental Studies (INCT-EMA), State of São Paulo Research Foundation (FAPESP), BF Clay Especialidades Ltda, 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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  3. Frank H. Quina
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  4. Flavio M. S. Carvalho
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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 101, 887–892 (2010). https://doi.org/10.1007/s10973-009-0431-7

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  • DOI: https://doi.org/10.1007/s10973-009-0431-7

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