Evaluation of single-extraction methods to estimate the oral bioaccessibility of metal(loid)s in soils - MULTIGNER-QUENEL - Evaluation des expositions et recherche épidémiologique sur l'environnement, la reproduction et le développement (3ERD) Accéder directement au contenu
Article Dans Une Revue Science of the Total Environment Année : 2020

Evaluation of single-extraction methods to estimate the oral bioaccessibility of metal(loid)s in soils

Résumé

Incidental ingestion of polluted soil particles exposes the population to toxic metal(loid)s. To refine the methods of exposure and risk assessment, it is relevant to use bioaccessible concentrations of metal(loid)s determined via in vitro digestion methods. However, some validated methods are complex and costly, involving high technical skills and numerous reagents. The objective of the present study was to evaluate the suitability of four simple chemical extractions to mimic the bioaccessible fraction of As, Cd, and Pb in the gastric (G) and gastrointestinal (GI) phases obtained using the validated UBM (unified bioaccessibility method) test. Acetic acid (0.11 M), citric acid (0.11 M), EDTA (0.16 M), and hydrochloric acid (HCl, 0.65%) were separately tested in 201 soil samples with a wide range of physicochemical parameters and metal(loid)s concentrations. Significant linear relationships were observed with HCl, EDTA, and to a lesser extent with citric acid. For the cheaper HCl method, correlations with the UBM ranged from 0.91 to 0.99 for the G phase and from 0.72 to 0.97 for the GI phase. This test can be used at least as a first-tier screening to assess the oral bioaccessibility of As, Cd, and Pb.
Fichier principal
Vignette du fichier
Pelfrene et al-2020-Evaluation of single-extraction methods-Accepted manuscript.pdf (2.76 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02550600 , version 1 (20-05-2020)

Identifiants

Citer

Aurélie Pelfrene, Karin Sahmer, Christophe Waterlot, Philippe Glorennec, Francis Douay, et al.. Evaluation of single-extraction methods to estimate the oral bioaccessibility of metal(loid)s in soils. Science of the Total Environment, 2020, 727, pp.138553. ⟨10.1016/j.scitotenv.2020.138553⟩. ⟨hal-02550600⟩
122 Consultations
377 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More