Wiberg, Karin
- Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
Sammanfattning
Soil with high levels of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) is found at contaminated sites all over the world. Transfer of PCDD/Fs from contaminated soil to the food chain could lead to elevated human exposure. As a complement to available monitoring data, multimedia fate and exposure modeling can be applied to support risk assessment of sites with PCDD/F contaminated soil. In this study, we evaluated the performance of the CalTOX fate and exposure model for 2,3,7,8-substituted PCDD/Fs against measured concentrations in air, soil, grass, carrots, potatoes, milk, meat, and eggs from a contaminated site in northern Sweden. The calculated total toxic equivalent (TEQ) concentrations agree with measurements within a factor of 10 for all exposure media but one. Results for individual congeners demonstrated that the model did not always perform well at describing key processes that mobilize PCDD/Fs out of soils, such as transfer into root crops and ingestion of soil by chickens. Uncertainty in only a small subset of input parameters affects the model output. Improved information and models describing transfer of soil particles onto leafy vegetation by rain splash and biotransfer factors for PCDD/Fs to milk, meat, and eggs are particular research needs to reduce uncertainties in model-based assessments.
Nyckelord
CalTOX; Contaminated soil; Fate and exposure modeling; PCDD/F; Dioxins; Risk assessment; Uncertainty analysis; Monte Carlo analysis
Publicerad i
Environmental Science and Pollution Research
2015, volym: 22, nummer: 11, sidor: 8719-8727
Utgivare: SPRINGER HEIDELBERG
SLU författare
UKÄ forskningsämne
Miljövetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1007/s11356-014-4037-7
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/68246