Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater

Pyroclastic material from the PCCVC eruption (Chile) was modified with iron (III) solutions leading to the formation of ferrihydrite surface deposits. The aim of the chemical treatment was to prepare an adsorbent to remove arsenic from water by using low-cost mineral wastes. Physicochemical characte...

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Detalles Bibliográficos
Autores principales: González, María José, Botto, Irma Lía, Canafoglia, María Elena, Coccaro, Laura Florencia, Soto, Edgardo Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Química
Ciencias Naturales
Volcanic ash
Iron modification
Arsenic removal
Groundwater
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/100987
https://ri.conicet.gov.ar/11336/48571
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-100987
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
Ciencias Naturales
Volcanic ash
Iron modification
Arsenic removal
Groundwater
spellingShingle Química
Ciencias Naturales
Volcanic ash
Iron modification
Arsenic removal
Groundwater
González, María José
Botto, Irma Lía
Canafoglia, María Elena
Coccaro, Laura Florencia
Soto, Edgardo Luis
Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
topic_facet Química
Ciencias Naturales
Volcanic ash
Iron modification
Arsenic removal
Groundwater
description Pyroclastic material from the PCCVC eruption (Chile) was modified with iron (III) solutions leading to the formation of ferrihydrite surface deposits. The aim of the chemical treatment was to prepare an adsorbent to remove arsenic from water by using low-cost mineral wastes. Physicochemical characterization of original and modified materials was carried out by XRD, BET-N2 adsorption, SEM-EDS microscopy and ICP-AES chemical analysis. The modified ash revealed that the increase of bulk iron content was close to 5% (expressed as Fe2O3) whereas surface values were 20.6% Fe2O3. Surface properties showed an increase of BET specific surface with prevalence of mesopores and an increase of total pore volume attributed to presence of nanoscopic iron phase. Kinetic and equilibrium studies were directed to optimize the operative conditions related to the material adsorptive capacity for removing arsenate species. Hence, the adsorbent dose, contact time, pH, stirring and sedimentation were evaluated in batch process. The optimal adsorption dose was 40 g・L−1 and the solid-liquid contact time was stirring (1 h) and sedimentation (23 h), enough to ensure an adequate turbidity value valid for a pH range between 3.77 and 8.95. The analysis of the isotherm equilibrium by using the Langmuir linear method showed a R2 = 0.995 value. The performance of the treatment to remove arsenic by using a cost-effective adsorbent prepared from volcanic material is a promising technology to apply in the environmental field.
format Articulo
Articulo
author González, María José
Botto, Irma Lía
Canafoglia, María Elena
Coccaro, Laura Florencia
Soto, Edgardo Luis
author_facet González, María José
Botto, Irma Lía
Canafoglia, María Elena
Coccaro, Laura Florencia
Soto, Edgardo Luis
author_sort González, María José
title Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
title_short Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
title_full Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
title_fullStr Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
title_full_unstemmed Iron-Modification of Pyroclastic Material from PCCVC Eruption (Chile): Characterization and Application to Remove Arsenic from Groundwater
title_sort iron-modification of pyroclastic material from pccvc eruption (chile): characterization and application to remove arsenic from groundwater
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/100987
https://ri.conicet.gov.ar/11336/48571
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