Remediation of uranium-contaminated soils is considered a high priority by the U.S. Department of Energy because these soils, if left untreated, represent a hazard to the environment and human health.
Because the risk to human health is a function of the solubility of uranium in the soils, the objectives of this work are to measure the uranium solubility of two contaminated soils, before and after remedial treatment, and determine the health risk associated with these soils.
Two carbonate-rich, uranium-contaminated soils from the U.S. Department of Energy Fernald Environmental Management Project facility near Cincinnati, Ohio, as well as two nearby background soils were characterized and their uranium solubility measured in a 75-d solubility experiment using acid rain, groundwater, lung serum, and stomach acid simulants.
Results show that the soluble uranium levels of each soil by each simulant are greatly influenced by their contamination source term.
Risk calculations and biokinetic modeling based on the solubility data show that the risks from the soil ingestion and groundwater ingestion pathways are the predominant contributors to the total carcinogenic risk, whereas the risk from the soil inhalation pathway is the smallest contributor to this risk. (...)
Mots-clés Pascal : Radiocontamination, Pollution sol, Uranium, Solubilité, Analyse risque, Impact environnement, Radioprotection, Modèle cinétique, Carcinogenèse, Toxicité, Nettoyage
Mots-clés Pascal anglais : Radioactive contamination, Soil pollution, Uranium, Solubility, Risk analysis, Environment impact, Radioprotection, Kinetic model, Carcinogenesis, Toxicity, Cleaning
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 97-0275793
Code Inist : 001D16D02. Création : 15/07/1997.