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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2018

Autores

Cachada, A (Autor) Outra; Coelho, C (Autor) Outra; Gavina, A (Autor) Outra; Dias, AC (Autor) Outra; Patinha, C (Autor) Outra; Reis, AP (Autor) Outra; Ferreira da Silva, EF (Autor) Outra; Duarte, AC (Autor) Outra; Ruth Pereira (Autor) FCUP

Revista

Título: Chemosphere

Vol. 191

Páginas: 196-203

ISSN: 0045-6535

Editora: Elsevier

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 14 Citações

Outras Informações

ID Authenticus: P-00N-4F4

DOI: 10.1016/j.chemosphere.2017.10.013

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8