The main topic of this study is a human health risk assessment of a defined exposure scenario in the floodplain soils of the headwater areas of the central European watershed, with the aim of exploring both multivariate and regional data structures. Flood-prone areas are recognized worldwide to be susceptible to contamination and its redistribution. Contributions of various classes of toxic compounds (organochlorine pesticides (OCPs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs)) to human health risks were assessed in a screening risk assessment. However, due to the relative nature of our data and a high PAH dominancy over the data ensemble, reliance solely on the standard statistical processing of raw data might lead to incomplete insight into the structure of the multivariate data. Explanatory analysis of the data structure using the compositional approach was found to be beneficial to elucidating human health risk profiles and provided robust evidence that a contrast between agricultural and airborne industrial pollution controlled the whole human toxicological variation of persistent organic pollutants (POPs) in floodplain soils. These results were effectively quantified with the subcomposition of benzo(a)pyrene, DDT, and alpha-hexachlorocyclohexane (aHCH), allowing for an interpretation of structural differences in regional pollution patterns, which conferred different extents and compositions of human health risks in floodplain soils.

• Keywords
• compositional data, floodplain, human health risk, soil pollution,
• MeSH
• Algorithms MeSH
• Hydrocarbons, Chlorinated analysis   MeSH
• Hexachlorocyclohexane analysis   MeSH
• Soil Pollutants analysis   MeSH
• Environmental Pollutants analysis   MeSH
• Humans MeSH
• Environmental Monitoring * MeSH
• Pesticides analysis   MeSH
• Polychlorinated Biphenyls analysis   MeSH
• Polycyclic Aromatic Hydrocarbons analysis   MeSH
• Soil chemistry   MeSH
• Floods * MeSH
• Check Tag
• Humans MeSH
• Publication type
• Journal Article MeSH
• Research Support, Non-U.S. Gov't MeSH
• Geographicals
• Europe MeSH
• Names of Substances
• alpha-hexachlorocyclohexane MeSH Browser
• Hydrocarbons, Chlorinated MeSH
• Hexachlorocyclohexane MeSH
• Soil Pollutants MeSH
• Environmental Pollutants MeSH
• Pesticides MeSH
• Polychlorinated Biphenyls MeSH
• Polycyclic Aromatic Hydrocarbons MeSH
• Soil MeSH

This work aimed to determine the seasonal variations of polycyclic aromatic hydrocarbons (PAHs) in airborne PM10 at two background sites (Masná-MS, Líšeň-LN) in Brno over a 5-year period (2009-2013). Samples were collected on quartz filters using a low-volume sampler by continual filtration. Concentrations of PAHs in collected PM10 samples were determined using a gas chromatography with a mass spectrometer as a detector. A different number of PAHs were determined to be at each site, i.e., 11 PAHs at the MS site and six PAHs at the LN site, and similarities between them were identified using non-parametric analysis of variance. Potential sources were identified using principal component analysis (PCA) and PAHs diagnostic ratios. The work also focused on health risk assessment. This was estimated using toxic equivalent factors to calculate individual lifetime cancer risk, which quantifies risk of exposure to PAHs for specific age groups. The average 11-PAH concentrations in M|S site annually ranged from 19.28 ± 19.02 ng m-3 (2011) to 40.37 ± 21.35 ng m-3 (2013). With regard to the LN site, the average six-PAH concentrations annually ranged from 3.64 ± 3.87 ng m-3 (2009) and 5.27 ± 6.19 ng m-3 (2012). PCA and diagnostic ratios indicate the main sources to be traffic emissions and coal combustion. Health risk assessment showed carcinogenic risk under limit value in all cases.

• Keywords
• Factor analysis, Health risk, Particulate matter, Polycyclic aromatic hydrocarbons, Traffic emissions,
• MeSH
• Environmental Health MeSH
• Risk Assessment MeSH
• Air Pollutants * analysis   toxicity   MeSH
• Humans MeSH
• Environmental Monitoring methods   MeSH
• Polycyclic Aromatic Hydrocarbons * analysis   toxicity   MeSH
• Check Tag
• Humans MeSH
• Publication type
• Journal Article MeSH
• Geographicals
• Czech Republic MeSH
• Names of Substances
• Air Pollutants * MeSH
• Polycyclic Aromatic Hydrocarbons * MeSH