1. Polycyclic aromatic hydrocarbons assessment in sediment of national parks in southeast Brazil
- Author
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Meire, Rodrigo Ornellas, Azeredo, Antonio, de Souza Pereira, Márcia, Paulo, João, Torres, Machado, and Malm, Olaf
- Subjects
Pollution ,Conservation of Natural Resources ,Geologic Sediments ,Time Factors ,Environmental Engineering ,Surface Properties ,Oceans and Seas ,Health, Toxicology and Mutagenesis ,media_common.quotation_subject ,Slash-and-burn ,Rainforest ,Environment ,Article ,chemistry.chemical_compound ,Environmental protection ,Environmental Chemistry ,Polycyclic Aromatic Hydrocarbons ,media_common ,Persistent organic pollutant ,National park ,Extramural ,Public Health, Environmental and Occupational Health ,Sediment ,Forestry ,General Medicine ,General Chemistry ,Phenanthrene ,chemistry ,Environmental science ,Brazil - Abstract
The aim of this work was to assess the levels of polycyclic aromatic hydrocarbons (PAHs) in the environment and their sources found in protected regions of southeastern Brazil. Samples of sediments were collected at four National Parks: Itatiaia National Park (PNIT), Serra da Bocaina National Park (PNSB), Serra dos Orgãos National Park (PNSO) and Jurubatiba National Park (PNJUB). The National Parks studied comprise rainforests, altitudinal fields and 'restinga' environments located in the Minas Gerais, Rio de Janeiro and São Paulo states. The sampling was conducted between 2002 and 2004 from June to September. In general, the environmental levels of PAHs found were similar to those in other remote areas around the globe. PNIT exhibited the highest median values of total PAHs in sediment (97 ng g(-1)), followed by PNJUB (89 ng g(-1)), PNSO (57 ng g(-1)) and PNSB (27 ng g(-1)). The highest levels of total PAHs (576 and 24430 ng g(-1)) could be associated to a point source contamination where are characterized for human activities. At PNSB and PNIT the PAH profiles were richer in 2 and 3 ring compounds, whereas at PNSO and PNJUB, the profiles exhibited 3 and 4 ring compounds. The phenanthrene predominance in most samples could indicate the influence of biogenic synthesis. The samples with a petrogenic pattern found in this study might be associated with the vicinity of major urban areas, highway traffic and/or industrial activities close to PNSO and PNIT. At PNIT and PNJUB, forest fires and slash and burn agricultural practices may drive the results towards a pyrolytic pattern.
- Published
- 2008