Availability of polycyclic aromatic hydrocarbons to earthworms in urban soils and its implications for risk assessment.

Autor: Cachada A; CESAM & Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal. Electronic address: acachada@ua.pt., Coelho C; CESAM & Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., Gavina A; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal., Dias AC; Department of Geosciences & GEOBIOTEC, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., Patinha C; Department of Geosciences & GEOBIOTEC, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., Reis AP; Department of Geosciences & GEOBIOTEC, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., da Silva EF; Department of Geosciences & GEOBIOTEC, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., Duarte AC; CESAM & Department of Chemistry, University of Aveiro, Campus de Santiago, 3810-193, Aveiro, Portugal., Pereira R; Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal; Department of Biology, Faculty of Sciences, University of Porto, Rua do Campo Alegre, 4169-007, Porto, Portugal.
Jazyk: angličtina
Zdroj: Chemosphere [Chemosphere] 2018 Jan; Vol. 191, pp. 196-203. Date of Electronic Publication: 2017 Oct 07.
DOI: 10.1016/j.chemosphere.2017.10.013
Abstrakt: Polycyclic aromatic hydrocarbons (PAHs) are a global problem, and in urban soils they can be found at potentially hazard levels. Nevertheless, the real risks that these contaminants pose to the environment are not well known, since the bioavailability of PAHs in urban soils has been poorly studied. Therefore, the bioavailability of PAHs in some selected urban soils from Lisbon (Portugal) was evaluated. Moreover, the applicability of a first screening phase based on total contents of PAHs was assessed. Results show that bioavailability of PAHs is reduced (low levels in earthworms, low accumulation percentages, and low biota-to-soil accumulation factors values), especially in more contaminated soils. The aging of these compounds explains this low availability, and confirms the generally accepted assumption that accumulation of PAHs in urban areas is mostly related with a long-term deposition of contaminated particles. The comparison of measured PAHs concentrations in earthworm tissues with the ones predicted based on theoretical models, reinforce that risks based on total levels are overestimated, but it can be a good initial approach for urban soils. This study also highlights the need of more reliable ecotoxicological data.
(Copyright © 2017 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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