RESUMO
In the present study the occurrence of emerging hydrophobic organic pollutants in sediment samples from South America (Chile and Colombia) was investigated for the first time. Nineteen Chilean and thirteen Colombian sediment samples were analyzed in order to determine their content of brominated flame retardants (BFRs) (including PBDEs and emerging BFRs) as well as UV filters (UV-F). Samples were collected from neighboring aquatic ecosystems highly urbanized and industrialized in Colombia (Magdalena River area) and Chile (Biobio region). Different analytical procedures were applied depending on the selected analytes, based on chromatographic and mass spectrometric methodologies (GC-MS and LC-MS-MS). In general, concentration levels of both BFRs (up to 2.43 and 143ngg(-1) dw of PBDEs in Chile and Colombia, respectively) and UV-F (nd-2.96 and nd-54.4ngg(-1) dw in Chile and Colombia, respectively) were in the low range of published data, and the contribution of BFRs was higher than that of UV-F for almost all the sampled sediments.
Assuntos
Poluentes Ambientais/análise , Poluentes Ambientais/química , Sedimentos Geológicos/química , Interações Hidrofóbicas e Hidrofílicas , Compostos Orgânicos/análise , Compostos Orgânicos/química , Raios Ultravioleta , Chile , Colômbia , Retardadores de Chama/análise , Hidrocarbonetos Bromados/análise , Hidrocarbonetos Bromados/químicaRESUMO
Liver samples from 53 Franciscana dolphins along the Brazilian coast were analyzed for organobrominated compounds. Target substances included the following anthropogenic pollutants: polybrominated diphenyl ethers (PBDEs), polybrominated biphenyls (PBBs), pentabromoethylbenzene (PBEB), hexabromobenzene (HBB), decabromodiphenylethane (DBDPE), as well as the naturally-generated methoxylated-PBDEs (MeO-PBDEs). PBDE concentrations ranged from 6 to 1797 ng/g lw (mean 166 ± 298 ng/g lw) and were similar to those observed in cetaceans from Northern Hemisphere. PBBs were found in all sampling locations (Assuntos
Golfinhos/metabolismo
, Monitoramento Ambiental
, Hidrocarbonetos Bromados/metabolismo
, Poluentes Químicos da Água/metabolismo
, Animais
, Oceano Atlântico
, Brasil
, Feminino
, Retardadores de Chama/análise
, Retardadores de Chama/metabolismo
, Éteres Difenil Halogenados/análise
, Éteres Difenil Halogenados/metabolismo
, Hidrocarbonetos Bromados/análise
, Fígado/metabolismo
, Masculino
, Bifenil Polibromatos/análise
, Bifenil Polibromatos/metabolismo
, Poluentes Químicos da Água/análise