Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
RAPID SINGLE EXTRACTION OF METALS FROM SOILS BY ULTRASOUND PROBE SONICATION AND MICROWAVE-ASSISTED EXTRACTION SYSTEMS AND SUBSEQUENT DETERMINATION BY ICP-AES
Year:2015
Research Areas
  • Owning and treatment sample,
  • Atomic spectrometry,
  • Soil chemistry
Information
Abstract
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.
International
Si
Congress
18th Edition of EuroAnalysis. The European Conference on Analytical Chemistry
960
Place
Bordeaux, France
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
06/09/2015
End Date
10/09/2015
From page
597
To page
597
EUROANALYSIS XVIII. BOOK OF ABSTRACTS
Participants
  • Autor: Sara Garcia Salgado (UPM)
  • Autor: M. Angeles Quijano Nieto (UPM)
  • Autor: David García Casillas
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Tecnología de Materiales y Medio Ambiente
  • Departamento: Ingeniería Civil: Hidráulica y Ordenación del Territorio
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)