Accumulation of polycyclic aromatic hydrocarbons in rural soils based on mass balances at the catchment scale
Identifieur interne : 000F90 ( Istex/Corpus ); précédent : 000F89; suivant : 000F91Accumulation of polycyclic aromatic hydrocarbons in rural soils based on mass balances at the catchment scale
Auteurs : Tilman Gocht ; Bertrand Ligouis ; Matthias Hinderer ; Peter GrathwohlSource :
- Environmental Toxicology and Chemistry [ 0730-7268 ] ; 2007-04.
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Abstract
Polycyclic aromatic hydrocarbons (PAHs) are hydrophobic organic pollutants that are ubiquitously distributed in the environment at relatively high concentrations. In our study we investigated the long‐term fate of atmospheric PAHs in soils of rural areas, resulting from diffuse pollution based on mass balances at the catchment scale. By determining PAHs in several environmental compartments, estimates of soil storages and water fluxes were made and compared with atmospheric deposition. The results indicate that more than 90% of the incoming PAHs remain in the catchments and accumulate in the topsoils. Furthermore, revolatilization of PAHs from soils and degradation in the soils is very limited, resulting in ongoing accumulation in topsoils, in particular for low‐volatile PAHs. Combustion‐derived carbonaceous particles were detected in atmospheric deposition as well as in the soil samples. Since these particles are very strong adsorbents, they are suspected to play a key role in the environmental fate of the diffuse distributed PAHs.
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DOI: 10.1897/06-287R.1
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|clé= ISTEX:A59E485266E76791620191A01D2BB72213714C7C
|texte= Accumulation of polycyclic aromatic hydrocarbons in rural soils based on mass balances at the catchment scale
}}
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