A proposal for a diet-based local PCDD/F deposition limit

• Published in: Chemosphere (Oxford) Vol. 93; no. 8; pp. 1639 - 1645
• Main Authors: Schiavon, M., Ragazzi, M., Rada, E.C.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.11.2013; Elsevier
• Subjects: acceptable daily intake; atmospheric deposition; Benzofurans - analysis; Biological and medical sciences; case studies; Dairy products; Deposition; Dibenzofurans, Polychlorinated; Diet; Diet - statistics & numerical data; Environmental Exposure - analysis; Environmental Exposure - statistics & numerical data; Environmental Policy; Environmental Pollutants - analysis; Food Chain; Food industries; Fundamental and applied biological sciences. Psychology; General aspects; grains; Humans; Limit value; Milk and cheese industries. Ice creams; Models, Biological; Models, Chemical; monitoring; PCDD/F; people; Pollution and sludges; polychlorinated dibenzodioxins; Polychlorinated Dibenzodioxins - analogs & derivatives; Polychlorinated Dibenzodioxins - analysis; steel; vegetables; World Health Organization; Alps; Italy; Europe; Limit value; PCDD/F; Dairy products; Diet; Deposition; Food chain; Dioxin derivatives; Atmospheric fallout; Dairy product; Tolerable level; Persistent organic pollutant; Trophic chain; Chlorine Organic compounds; Toxic equivalency factor; Air ground interface
• ISSN: 0045-6535; 1879-1298
• DOI: 10.1016/j.chemosphere.2013.08.041

•Food chain models were edited to get a region-specific PCDD/F deposition limit.•The calculation started from the local diet and the WHO’s Tolerable Daily Intake.•The case-study refers to an Alpine valley where a steel producing plant is present.•Dairy products are of primary importance in the PCDD/F intake.•PCDD/F deposition was measured for one year and was lower than the limit value. This study proposes a method to estimate the maximal tolerable value for the atmospheric deposition of dioxins (PCDD/Fs) to soil. The case study for the application of this methodology is an Alpine valley where a steel production plant is present. In order to estimate the limit value for the PCDD/F deposition, consolidated food chain models were applied, but were adapted to be run backwards with respect to their original formulation, by starting from the diet of people living in the region and from the PCDD/F Tolerable Daily Intake value proposed by the World Health Organization. For this case study, the estimated limit value was 2.30pg WHO-TEQ m−2d−1 when only local diary products were taken into account and 1.91pg WHO-TEQ m−2d−1 when also the role of local cereals and vegetables was considered. The average PCDD/F deposition measured in the same region during a monitoring campaign was lower than the above limit values (1.40pg WHO-TEQ m−2d−1). Indications on how to consider the contribution of meat and fish are provided too. The approach proposed in this paper represents a useful tool to assess the acceptable overall deposition for a specific region.