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Thermal behavior of Cu(II)-, Cd(II)-, and Hg(II)-exchanged montmorillonite complexedwith cysteine

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Abstract

The thermal behavior of montmorillonite and organically modified montmorillonite, both treated with heavy metal cations [Cu(II), Cd(II) and Hg(II)], was characterized via thermal analyses (TG, DTG and DTA) combined with evolved species gas mass spectrometry (MS-EGA), and X-ray diffraction at in situ controlled temperature (HTXRD). The reactions involving Cu(II)- and Cd(II)-montmorillonite samples are mostly related to H2O and OH loss, unlike Hg(II)-montmorillonite, where effects associated to Hg(II) loss are also present. Finally reactions related to dehydration, dehydroxylation and to organic matter decomposition can be observed in montmorillonite samples treated with cysteine.

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Authors and Affiliations

  1. Dipartimento di Scienze della Terra, Università di Modena e Reggio Emilia, Modena, Italy, 41100, via S. Eufemia 19

    D. Malferrari, Maria Franca Brigatti, Angela Laurora & S. Pini

  2. IMAA–CNR, Area della Ricerca di Potenza, Tito Scalo, Potenza, Italy, 85050, Via S. Loja

    L. Medici

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  1. D. Malferrari
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  2. Maria Franca Brigatti
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  3. Angela Laurora
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  4. L. Medici
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  5. S. Pini
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Correspondence to Maria Franca Brigatti.

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Malferrari, D., Brigatti, M., Laurora, A. et al. Thermal behavior of Cu(II)-, Cd(II)-, and Hg(II)-exchanged montmorillonite complexedwith cysteine. J Therm Anal Calorim 86, 365–370 (2006). https://doi.org/10.1007/s10973-005-7327-y

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  • DOI: https://doi.org/10.1007/s10973-005-7327-y

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