Ponencias en congresos:
RAPID SINGLE EXTRACTION OF METALS FROM SOILS BY ULTRASOUND PROBE SONICATION AND MICROWAVE-ASSISTED EXTRACTION SYSTEMS AND SUBSEQUENT DETERMINATION BY ICP-AES
RAPID SINGLE EXTRACTION OF METALS FROM SOILS BY ULTRASOUND PROBE SONICATION AND MICROWAVE-ASSISTED EXTRACTION SYSTEMS AND SUBSEQUENT DETERMINATION BY ICP-AES
Año:2015
Áreas de investigación
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Toma y tratamiento de muestra, -
Espectrometría atómica,
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Química del suelo
Datos
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Descripción
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| The accumulation of metals in soils causes a potential risk to human health due to their transfer to other environmental compartments. Extractable forms are better indicators for mobility, bioavailability, and therefore toxicity of metals. However, in the conventional single extraction procedures (SM&T program), long extraction times and large quantities of samples and reagents are typically employed for the determination of extractable metal contents. In this work, ultrasonic probe sonication (UPS) and microwave-assisted extraction (MAE) were assessed as alternatives to the mechanical shaking used in the conventional procedures (CP) for single extraction of metals in soils. Extractable concentrations of Cd, Cr, Cu, Ni, Pb and Zn using 0.01 M CaCl2, 0.43 M CH3COOH and 0.05 M EDTA at pH 7.0 were determined by ICP-AES. Optimization studies were carried out on BCR 483 and 700 for accuracy evaluation of methods. In the proposed methods, the extraction times were reduced from hours (CP) to minutes (UPS and MAE), reducing the amount of sample and extractants in factors of 5-10, maintaining the w/V ratio. The optimized methods were applied to polluted soils from the surroundings of the Mónica mine (Madrid), with Cd, Cu, Pb and Zn concentration levels higher than VR90 (than MAC for Pb in some areas). Results showed higher mobility for Cd (up to 34% in CaCl2 extraction) and bioavailability for Cd, Cu and Pb (up to 50% and 36% in CH3COOH and EDTA extractions, respectively). Furthermore, Pearson?s coefficients showed a highly significant correlation between total and extractable element concentrations in soils. | |
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Internacional
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Si |
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Nombre congreso
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18th Edition of EuroAnalysis. The European Conference on Analytical Chemistry |
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Tipo de participación
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960 |
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Lugar del congreso
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Bordeaux, France |
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Revisores
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Si |
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ISBN o ISSN
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0000-0000 |
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DOI
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Fecha inicio congreso
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06/09/2015 |
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Fecha fin congreso
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10/09/2015 |
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Desde la página
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597 |
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Hasta la página
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597 |
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Título de las actas
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EUROANALYSIS XVIII. BOOK OF ABSTRACTS |
Participantes
- Autor: Sara Garcia Salgado (UPM)
- Autor: M. Angeles Quijano Nieto (UPM)
- Autor: David García Casillas
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
- Creador: Grupo de Investigación: Tecnología de Materiales y Medio Ambiente
- Departamento: Ingeniería Civil: Hidráulica y Ordenación del Territorio
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