Assessing Cd,Pb, Zn human bioaccessibility in smelter-contaminated agricultural topsoils (northern France) |
| |
Authors: | Aurélie Pelfrêne Christophe Waterlot Muriel Mazzuca Catherine Nisse Géraldine Bidar Francis Douay |
| |
Institution: | 1.Univ Lille Nord de France,Lille,France;2.Groupe ISA, Equipe Sols et Environnement, Laboratoire Génie Civil et géoEnvironnement Lille Nord de France, EA 4515,Lille Cedex,France;3.UDSL, EA 4483, Impact de l’Environnement Chimique sur la Santé Humaine,Lille,France;4.CHULille, Service de Pathologie Professionnelle et Environnement,Lille,France |
| |
Abstract: | The extractability of Cd, Pb, and Zn was investigated in contaminated agricultural topsoils located in an area highly affected
by the past atmospheric emissions of two smelters in northern France in order to assess their mobility and human bioaccessibility.
The determination of Cd, Pb, and Zn bioaccessibility (Unified Barge Method, in vitro test) was made to evaluate the absolute
trace element (TE) bioavailability. The results highlighted differences in bioaccessibility between Cd, Pb, and Zn (Cd > Pb > Zn).
The mean values of the bioaccessible fractions of Cd, Pb, and Zn during the gastric phase were 82, 55, and 33%, respectively,
of the pseudototal concentrations, whereas during the gastrointestinal phase, the bioaccessible fractions of metals decreased
to 45, 20, and 10%, respectively. Stepwise multiple regression analysis showed that human bioaccessibility was affected by
various physicochemical parameters (i.e., sand, carbonates, organic matter, assimilated P, free Al oxides, and pseudototal
Fe contents). Sequential extractions were performed as an indication of the TE availability in these soils. Cadmium occurred
in the more available fractions, Pb was mostly present as bound by oxides, and a significant contribution to the pseudototal
Zn concentration was defined as the unavailable residual form related to the crystalline structures of minerals. The concepts
of bioavailability and bioaccessibility are important for quantifying the risks associated with exposure to environmental
pollutants and providing more realistic information for human health. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|