title: Influence of soil ageing on bioavailability and ecotoxicity of lead carried by process waste metallic ultrafine particles.
abstract: Ultrafine particulate matters enriched with metals are emitted into the atmosphere by industrial activities and can impact terrestrial and aquatic ecosystems. Thus, this study investigated the environmental effects of process particles from a lead-recycling facility after atmospheric deposition on soils and potential run-off to surface waters. The toxicity of lead-enriched PM for ecosystems was investigated on lettuce and bacteria by (i) germination tests, growth assays, lead transfer to plant tissues determination and (ii) Microtox analysis. The influence of ageing and soil properties on metal transfer and ecotoxicity was studied using three different soils and comparing various aged, spiked or historically long-term polluted soils. Finally, lead availability was assessed by 0.01 M CaCl(2) soil extraction. The results showed that process PM have a toxic effect on lettuce seedling growth and on Vibrio fischeri metabolism. Soil-PM interactions significantly influence PM ecotoxicity and bioavailability; the effect is complex and depends on the duration of ageing. Solubilisation or stabilisation processes with metal speciation changes could be involved. Finally, Microtox and phytotoxicity tests are sensitive and complementary tools for studying process PM ecotoxicity.
authors.affiliation: Université de Toulouse, INP, UPS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), ENSAT, Avenue de l'Agrobiopole, 31326 Castanet Tolosan, France.
authors.forename: E
authors.initials: E
authors.lastname: Schreck
authors.forename: Y
authors.initials: Y
authors.lastname: Foucault
authors.forename: F
authors.initials: F
authors.lastname: Geret
authors.forename: P
authors.initials: P
authors.lastname: Pradere
authors.forename: C
authors.initials: C
authors.lastname: Dumat
mesh_terms: D000393:Air Pollutants / Q000493:pharmacokinetics / Q000633:toxicity*; D048908:Aliivibrio fischeri / Q000187:drug effects; D001682:Biological Availability; D018525:Germination; D007220:Industrial Waste / Q000032:analysis; D007854:Lead / Q000493:pharmacokinetics / Q000633:toxicity*; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D052638:Particulate Matter / Q000633:toxicity*; D012987:Soil; D012989:Soil Pollutants / Q000493:pharmacokinetics / Q000633:toxicity*; D013997:Time Factors; D018675:Toxicity Tests
chemical_list: D000393:Air Pollutants; D007220:Industrial Waste; D052638:Particulate Matter; D012987:Soil; D012989:Soil Pollutants; D007854:Lead