NDLI: Promoting the use of BaP as a marker for PAH exposure in UK soils.

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Promoting the use of BaP as a marker for PAH exposure in UK soils.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Bull, Sarah Collins, Chris
Description	Country affiliation: United kingdom Author Affiliation: Bull S ( Toxicology Department, Centre for Radiation Chemical and Environmental Hazards, Health Protection Agency, Chilton, OX11 0RQ, UK.)
Abstract	Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous environmental pollutants that frequently accumulate in soils. There is therefore a requirement to determine their levels in contaminated environments for the purposes of determining impacts on human health. PAHs are a suite of individual chemicals, and there is an ongoing debate as to the most appropriate method for assessing the risk to humans from them. Two methods predominate: the surrogate marker approach and the toxic equivalency factor. The former assumes that all chemicals in a mixture have an equivalent toxicity. The toxic equivalency approach estimates the potency of individual chemicals relative to the usually most toxic Benzo(a)pyrene. The surrogate marker approach is believed to overestimate risk and the toxic equivalency factor to underestimate risk. When analysing the risks from soils, the surrogate marker approach is preferred due to its simplicity, but there are concerns because of the potential diversity of the PAH profile across the range of impacted soils. Using two independent data sets containing soils from 274 sites across a diverse range of locations, statistical analysis was undertaken to determine the differences in the composition of carcinogenic PAH between site locations, for example, rural versus industrial. Following principal components analysis, distinct population differences were not seen between site locations in spite of large differences in the total PAH burden between individual sites. Using all data, highly significant correlations were seen between BaP and other carcinogenic PAH with the majority of r (2) values > 0.8. Correlations with the European Food Standards Agency (EFSA) summed groups, that is, EFSA2, EFSA4 and EFSA8 had even higher correlations (r (2) > 0.95). We therefore conclude that BaP is a suitable surrogate marker to represent mixtures of PAH in soil during risk assessments.
File Format	HTM / HTML
ISSN	02694042
Issue Number	1
Volume Number	35
e-ISSN	15732983
Journal	Environmental Geochemistry and Health
Language	English
Publisher	Springer
Publisher Date	2013-02-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Health Environmental Exposure Analysis Environmental Pollutants Polycyclic Hydrocarbons, Aromatic Soil Pollutants Chemistry Benzo(a)pyrene Toxicity Carcinogens, Environmental Humans Principal Component Analysis Risk Assessment Methods Soil Great Britain Journal Article
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Medicine Geochemistry and Petrology Environmental Engineering Water Science and Technology

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