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Application of raw and modified Uruguayan clays to phosphate adsorption for water remediation

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Abstract

A raw clay from Uruguay was modified with aluminium to obtain an aluminium pillared clay (Al-PILC). The solids were characterized by scanning electron microscopy, X-ray diffraction and nitrogen adsorption-desorption isotherms. The Al-PILC retained the typical laminar structure of montmorillonite. The specific surface area and the microporous volume of the Al-PILC, 235 m2 g-1 and 0.096 cm3 g-1, respectively, were much higher than those of the clay. The phosphate adsorption capacity of the Al-PILC was higher than those of the clay. The phosphate adsorption kinetic followed the pseudo-first-order model for both, the clay and the Al-PILC, and the phosphate adsorption isotherm for the Al-PILC fit the Freundlich model.

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Authors and Affiliations

  1. Grupo de Instrumentación y Automatización en Química Analítica (GIAQA), Área Química Analítica, DEC, Facultad de Química, Universidad de la República, Montevideo, Uruguay

    Pablo González

  2. Laboratorio de Fisicoquímica de Superficies, DETEMA, Facultad de Química, Universidad de la República, Montevideo, Uruguay

    Andrea C. De Los Santos, Jorge R. Castiglioni & María A. De León

Authors
  1. Pablo González
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  2. Andrea C. De Los Santos
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  3. Jorge R. Castiglioni
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  4. María A. De León
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González, P., De Los Santos, A.C., Castiglioni, J.R. et al. Application of raw and modified Uruguayan clays to phosphate adsorption for water remediation. MRS Advances 3, 3543–3549 (2018). https://doi.org/10.1557/adv.2018.586

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  • DOI: https://doi.org/10.1557/adv.2018.586

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