To determine if the bioavailability of As in contaminated media is a function of As concentration.
Research is in progress to satisfy project objectives.
Chemical characterization of contaminated media and soils Chemical analysis show all study soils and media contained elevated levels of arsenic, lead, zinc, copper and nickel. Arsenic occurs in oxide and sulfate based minerals in contaminated samples. Samples contained significant amounts of sulfate and chloride which may influence the solubility and possibly the bioavailability of anionic arsenate. Chemical speciation of contaminated media Chemical speciation of arsenic was accomplished by using various extracting solutions to extract As from contaminated soils. In-vivo pig feeding study Results from pig feeding trials involving two contaminated materials have been conducted.