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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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