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Nitrate removal using natural clays modified by acid thermoactivation |
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| Authors: | C.J. Mena-Duran T. Lopez D.H. Aguilar J.A. Odriozola |
| Affiliation: | a Cinvestav-Unidad Mérida, Applied Physics Department, A.P. 73, Cordemex, 97310 Mérida, Yuc, Mexico b Pontificia Universidad Católica del Perú, Depto. Ciencias, Sección Química, Apdo. 1761, Lima 100, Peru c U.A.M.-Iztapalapa, Chemistry Department, A.P. 55-534, 09340 México, D.F., Mexico d Instituto de Ciencia de Materiales de Sevilla (University of Seville-CSIC), Av. Américo Vespucio 49, Sevilla 41092, Spain |
| Abstract: | Groundwater pollution by nitrates is a widespread problem in many locations in the world. The underground aquatic mantle of the Peninsula of Yucatan is highly vulnerable due to its karstic nature. Adsorption methods are a good choice for nitrate elimination. In this work, a natural calcium bentonite was modified by acid thermoactivation with HCl and H2SO4, and tested as a media for nitrate removal in an aqueous solution. The nitrate concentration in the solution was measured by FT-IR, using the Lambert-Beer law. Clay characterization was carried out by X-ray diffraction and FT-IR spectroscopy; surface area was measured by the BET method. |
| Keywords: | 61.10.Nz 78.30.Hv 81.20.Ka |
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