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1.
Mar Pollut Bull ; 177: 113518, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-35299147

RESUMO

Air-sea exchange of POPs and PAHs was assessed in Concepción Bay during January, summer 2015. Results showed low levels, in air and water, for POPs (1-20 pg m-3, and 6-50 pg L-1, respectively) and for ΣPAHs (1-2 ng m-3 and 1-2 ng L-1, respectively). The highest levels were found for PBDEs (200-20,000 pg L-1) in the water samples (3-fold times higher than PCBs and OCP) and PBDE209 accounted for 90% of total ΣPBDEs. Air-sea exchange fluxes (ng m-2 d-1) were low in general, with exception of PBDEs showing values up to 40,000 ng m-2 d-1. Net deposition was found for PAHs, HCB and some PBDEs; while, BDE99, and BDE100 showed net volatilization. These findings contribute with new data of diffusive air-sea exchange on the southern hemisphere Pacific coast.


Assuntos
Poluentes Atmosféricos , Poluentes Químicos da Água , Poluentes Atmosféricos/análise , Baías , Chile , Monitoramento Ambiental , Poluentes Químicos da Água/análise
2.
Mar Pollut Bull ; 174: 113144, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35090286

RESUMO

Persistent organic pollutants (POPs) and polycyclic aromatic hydrocarbons (PAHs) were determined in abiotic samples from Concepción Bay in Central Chile. Samples were soxhlet extracted and injected in gas chromatography-mass spectrometry (GCMS). Polybrominated diphenyl ethers (PBDEs) showed the highest levels in air (3-1100 pg m-3), in water (2-64 pg L-1), in sediment, and soil (1-78 ng g-1 (dw)). PAHs were also high in the air (1-6 ng m-3), in water (1-7 ng L-1), in sediment (90-300 ng g-1 (dw)), and in soil (15-2300 ng g-1 (dw)). The polychlorinated biphenyls (PCBs) and chlorinated pesticides were generally low and did not show clear trends along the water column, with exception of PAHs. New data are presented in this work to assess the health status of a relevant coastal area in central Chile.


Assuntos
Poluentes Ambientais , Hidrocarbonetos Policíclicos Aromáticos , Baías , Chile , Monitoramento Ambiental , Hidrocarbonetos Policíclicos Aromáticos/análise , Tsunamis
3.
Mar Pollut Bull ; 95(1): 480-3, 2015 Jun 15.
Artigo em Inglês | MEDLINE | ID: mdl-25963572

RESUMO

PBDEs (10 congeners) were analyzed using GC-MS in superficial sediments and organisms of the Concepción Bay after the 2010 Tsunami. From all congeners analyzed PBDE-47, -99, -100 and -209 were the most frequently detected. Concentrations (ngg(-1) d.w.) in sediments for ΣPBDE-47, -99, -100 were low (0.02-0.09). However, PBDE-209 showed significantly higher values ∼20ngg(-1) d.w. This result were ∼10 times lower than those reported in a previous study of the 2010 Tsunami. The high result might be influenced by the massive urban debris dragged by the 2010 Tsunami. In organisms, concentrations of PBDE-47, -99, -100 (∼0.4ngg(-1) d.w.) were higher than those found in sediments (∼0.04ngg(-1) d.w.). Differences in PBDE pattern were also observed between different levels of the trophic food chain (primary and secondary consumers). This is the first attempt to assess the current status of Concepción Bay after the 2010 Tsunami.


Assuntos
Monitoramento Ambiental , Éteres Difenil Halogenados/análise , Tsunamis , Poluentes Químicos da Água/análise , Baías/química , Chile , Cromatografia Gasosa-Espectrometria de Massas
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