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Journal of Spectroscopy
Volume 2013, Article ID 254517, 8 pages
http://dx.doi.org/10.1155/2013/254517
Research Article

Spectroscopic and Microscopic Characterization of Volcanic Ash from Puyehue-(Chile) Eruption: Preliminary Approach for the Application in the Arsenic Removal

1CEQUINOR Facultad de Ciencias Exactas (CONICET La Plata-UNLP), 47 y 115, 1900 La Plata, Argentina
2Dipartimento di Chimica, Universitá di Roma La Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
3INREMI Facultad de Ciencias Naturales y Museo (CICPBA-UNLP), 64 y 120, 1900 La Plata, Argentina

Received 17 May 2013; Revised 17 July 2013; Accepted 2 August 2013

Academic Editor: Niksa Krstulovic

Copyright © 2013 Irma Lia Botto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Volcanic ash from Puyehue Cordon Caulle Volcanic Complex (Chile), emitted on June 4, 2011, and deposited in Villa La Angostura at ~40 km of the source, was collected and analyzed by Raman spectroscopy, optical and scanning electron microscopy (SEM-EDS), X-ray diffraction (XRD), surface area (BET), and chemical analysis (ICP-AES-MS technique). The mineralogical and physicochemical study revealed that the pyroclastic mixture contains iron oxides in the form of magnetite and hematite as well as pyroxene and plagioclase mineral species and amorphous pumiceous shards. Carbonaceous material was also identified. Physicochemical techniques allow us to select two representative samples (average composition and Fe-rich materials) which were used to analyze their performances in the adsorption process to remove arsenic from water. Additional iron activation by means of ferric salts was performed under original sample. Results showed that the low-cost feedstock exhibited a good adsorption capacity to remove the contaminant, depending on the iron content and the water pH.