Science Inventory

IMPACTS OF AGING ON IN VIVO AND IN VITRO MEASUREMENTS OF SOIL-BOUND POLYCYCLIC AROMATIC HYDROCARBON AVAILABILITY

Citation:

Reeves, W. R., T. J. McDonald, N. Bordelon, S E. George, AND K. C. Donnelly. IMPACTS OF AGING ON IN VIVO AND IN VITRO MEASUREMENTS OF SOIL-BOUND POLYCYCLIC AROMATIC HYDROCARBON AVAILABILITY. ENVIRONMENTAL SCIENCE & TECHNOLOGY 35(8):1637-1643, (2001).

Description:

Ingestion of contaminated soil is an exposure pathway at approximately one-half of the Superfund sites in the United States. This study was designed to evaluate the impacts of aging in soil on the availability of polycyclic aromatic hydrocarbons (PAHs). Two coal tar (CT)-amended soils were prepared. One was aged for 270 days and the other was not aged. Both of these treatments were incorporated into pellets and fed to male Fischer 344 rats. Excretion of 1-hydroxypyrene (1-OHP) in urine and PAH concentrations in the liver were monitored as end points. Additionally, soil:water partitioning and desorption were measured as comparisons to the in vivo results. After 5 days of ingesting their respective treatments, rats in the aged soil group excreted 4.41 +/- 1.67 ppm 1-OHP/mg of pyrene ingested while rats in the unaged soil group excreted 5.27 +/- 1.37 ppm/mg of pyrene ingested. Animals fed aged CT soil had 0.051 +/- 0.011 ppm carcinogenic PAHs in livers/mg ingested while rats fed unaged CT soil had 0.063 +/- 0.037 ppm carcinogenic PAHs in livers/mg ingested. Partitioning and desorption results revealed similar results. These results indicate that, at high application rates, soil contact time may not play as significant a role in determining availability as simple dispersion and sorption on soil.

Record Details:

Record Type: DOCUMENT (JOURNAL/PEER REVIEWED JOURNAL)
Product Published Date: 04/15/2001
Record Last Revised: 12/22/2005
Record ID: 65200

Organization:

U.S. ENVIRONMENTAL PROTECTION AGENCY

OFFICE OF RESEARCH AND DEVELOPMENT

NATIONAL HEALTH AND ENVIRONMENTAL EFFECTS RESEARCH LABORATORY

ENVIRONMENTAL CARCINOGENESIS DIVISION

GENETIC AND CELLULAR TOXICOLOGY BRANCH