Availability of polycyclic aromatic hydrocarbons to earthworms in urban soils and its implications for risk assessment
| Autor: | Ana Gavina, C. Coelho, Carla Patinha, A. C. Dias, Amelia Reis, E. Ferreira da Silva, Armando C. Duarte, Ruth Pereira, Anabela Cachada |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Theoretical models Biological Availability Global problem 010501 environmental sciences Risk Assessment 01 natural sciences Soil Animals Soil Pollutants Environmental Chemistry Oligochaeta Polycyclic Aromatic Hydrocarbons 0105 earth and related environmental sciences Portugal biology Earthworm Public Health Environmental and Occupational Health Environmental engineering General Medicine General Chemistry Contamination biology.organism_classification Pollution Bioavailability Deposition (aerosol physics) Environmental chemistry Soil water Environmental science Environmental Pollution Risk assessment |
| Zdroj: | Chemosphere. 191:196-203 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2017.10.013 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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