title: Effect of Miscanthus cultivation on metal fractionation and human bioaccessibility in metal-contaminated soils: comparison between greenhouse and field experiments.
abstract: The in situ stabilization of metals in soils using plants with great biomass value is a promising, cost-effective, and ecologically friendly alternative to manage metal-polluted sites. The goal of phytostabilization is to reduce the bioavailable concentrations of metals in polluted soil and thus reduce the risk to the environment and human health. In this context, this study aimed at evaluating Miscanthus × giganteus efficiency in phytostabilizing metals on three contaminated agricultural sites after short-term exposure under greenhouse conditions and after long-term exposure under field conditions. Particular attention was paid to the influence of Miscanthus cultivation on (i) Cd, Pb, and Zn fractionation using sequential extractions and (ii) metal bioaccessibility using an in vitro gastrointestinal digestion test. Data gave evidence of (i) different behaviors between the greenhouse and the field; (ii) metal redistribution in soils induced by Miscanthus culture, more specifically under field conditions; (iii) higher environmental availability for Cd than for Pb and Zn was found in both conditions; and (iv) overall, a higher bioaccessible fraction for Pb (about 80 %) and Cd (65-77 %) than for Zn (36-52 %) was recorded in the gastric phase, with a sharp decrease in the intestinal phase (18-35 % for Cd, 5-30 % for Pb, and 36-52 % for Zn). Compared to soils without culture, the results showed that phytostabilization using Miscanthus culture provided evidence for substantial effects on oral bioaccessibility of Cd, Pb, and Zn.
authors.affiliation: Groupe ISA, Laboratoire Génie Civil et géo-Environnement (LGCgE), 48 boulevard Vauban, 59046, Lille cedex, France, aurelie.pelfrene@isa-lille.fr.
authors.forename: Aurélie
authors.initials: A
authors.lastname: Pelfrêne
authors.forename: Andrea
authors.initials: A
authors.lastname: Kleckerová
authors.forename: Bertrand
authors.initials: B
authors.lastname: Pourrut
authors.forename: Florien
authors.initials: F
authors.lastname: Nsanganwimana
authors.forename: Francis
authors.initials: F
authors.lastname: Douay
authors.forename: Christophe
authors.initials: C
authors.lastname: Waterlot
mesh_terms: D001673:Biodegradation, Environmental; D001682:Biological Availability; D005591:Chemical Fractionation; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis / Q000493:pharmacokinetics*; D006109:Poaceae / Q000254:growth & development* / Q000378:metabolism*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis / Q000493:pharmacokinetics*; D013997:Time Factors
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants