Bioaccessibility tests accurately estimate bioavailability of lead to quail.

摘要: Hazards of soil-borne lead (Pb) to wild birds may be more accurately quantified if the bioavailability that Pb is known. To better understand birds, authors measured blood concentrations in Japanese quail (Coturnix japonica) fed diets containing Pb-contaminated soils. Relative bioavailabilities were expressed by comparison with a acetate reference diet. Diets soil from 5 Superfund sites had relative 33% 63%, mean approximately 50%. Treatment 2 soils phosphorus (P) significantly reduced Pb. Bioaccessibility test was then 6 vitro tests and regressed on bioavailability: leaching procedure at pH 1.5, same conducted 2.5, Ohio State University gastrointestinal method, urban bioaccessible test, modified physiologically based extraction waterfowl test. All regressions positive slopes. Based criteria slope coefficient determination, 2.5 performed very well. Speciation X-ray absorption spectroscopy demonstrated that, average, most sampled sorbed minerals (30%), bound organic matter (24%), or present as sulfate (18%). Additional associated P (chloropyromorphite, hydroxypyromorphite, tertiary phosphate) carbonates, leadhillite (a carbonate hydroxide), sulfide. The formation chloropyromorphite Pb, amendment thermodynamically favored means sequester Environ Toxicol Chem 2016;35:2311-2319. Published 2016 Wiley Periodicals Inc. behalf SETAC. This article US Government work and, such, public domain United States America.