RESUMO
The green mussel, Perna viridis, was used to measure bioaccumulated levels of organochlorine pesticides in the marine environment of Cuba. Samples were collected in the Cienfuegos Bay between January and December 2010. The organochlorine pesticides (i.e. DDT, Dieldrin, Chlordane, Endosulfan, HCB, Aldrin, Heptachlor and Lindane) were quantified by gas chromatography. The sum of all organochlorine pesticides in P. viridis was 6.31 ng g(-1). The concentration ranged from 3.53 to 4.42 ng g(-1) dry weight (dw) for DDTs (i.e. sum of pp' DDT, pp' DDD, op' DDE and pp' DDE); 1.7-1.9 ng g(-1) dw for Dieldrin; 0.17-0.20 ng g(-1) dw for Chlordanes; 0.14-0.16 ng g(-1) dw for Endosulfan; 0.11-0.17 ng g(-1) dw for HCB; 0.07-0.11 ng g(-1) dw for Aldrin; 0.046-0.054 ng g(-1) dw for Heptachlor and 0.035-0.039 ng g(-1) dw for Lindane. These levels can be considered as low when compared to reported values from similar studies conducted elsewhere in the world. The concentrations of all organochlorines residues detected in this study fell below the EU Maximum Residue Limits.
Assuntos
Monitoramento Ambiental , Hidrocarbonetos Clorados/metabolismo , Perna (Organismo)/metabolismo , Praguicidas/metabolismo , Poluentes Químicos da Água/metabolismo , Aldrina/metabolismo , Animais , Baías/química , Cuba , Diclorodifenil Dicloroetileno/metabolismo , Dieldrin/metabolismo , Endossulfano/metabolismo , Heptacloro/metabolismo , Hexaclorobenzeno/metabolismo , Hexaclorocicloexano/metabolismo , Poluição Química da Água/estatística & dados numéricosRESUMO
This monitoring study of 192 samples of cow's milk collected from the central region of Veracruz state was conducted to determine the contamination levels of organochlorine pesticides. The results obtained for mean DDT and HCH levels were 0.057 and 0.098 mg/kg respectively expressed on fat basis and are within FAO tolerances and similar to those found in other tropical countries.
Assuntos
Inseticidas/análise , Leite/química , Resíduos de Praguicidas/análise , Aldrina/análise , Aldrina/metabolismo , Animais , Bovinos , Cromatografia Gasosa , DDT/análise , DDT/metabolismo , Diclorodifenil Dicloroetileno/análise , Diclorodifenil Dicloroetileno/metabolismo , Análise de Alimentos , Contaminação de Alimentos , Guias como Assunto , Heptacloro/análise , Heptacloro/metabolismo , Heptacloro Epóxido/análise , Heptacloro Epóxido/metabolismo , Hexaclorocicloexano/análise , Hexaclorocicloexano/metabolismo , Inseticidas/metabolismo , México , Resíduos de Praguicidas/metabolismo , Organização Mundial da SaúdeRESUMO
Laboratory experiments were conducted at different salinities (35, 26 and 17/1000) to determine accumulation and depuration rates of the organochlorine compound aldrin by the oyster Crassostrea rhizophorae, Ciénaga Grande de Santa Marta (Colombian Caribbean). Residual levels were detected in tissues after 24 hours of exposure, showing increases directly related to the exposure concentration. For all the exposure concentrations the highest retention values were measured at 26/1000 salinities, followed by 17/1000, and the lowest values at the highest salinity. The highest bioconcentration values were 96115.5 (at 26/1000), 37938.9 (at 17/1000), and 22605.1, (35/1000) times the environmental concentration. The depuration process varied across salinity levels. At 26/1000 there was a clear decrease in the residual levels during the first five days, eliminating in this period the same amount as oysters kept at 17/1000 for 20 days and surpassing the amount eliminated by those kept at 35/1000 for 20 days. A rapid decrease in the amount of residues is followed by a slow elimination of the aldrin remaining in tissues
Assuntos
Animais , Água do Mar/química , Aldrina/análise , Ostreidae/química , Aldrina/metabolismo , Região do CaribeAssuntos
Inseticidas/análise , Resíduos de Praguicidas/análise , Poluentes Químicos da Água/análise , Aldrina/análise , Aldrina/metabolismo , Animais , Bivalves/metabolismo , DDT/análise , DDT/metabolismo , Decápodes/metabolismo , Endrin/análise , Endrin/metabolismo , Liofilização , Água Doce , Hexaclorobenzeno/análise , Hexaclorobenzeno/metabolismo , Hexaclorocicloexano/análise , Hexaclorocicloexano/metabolismo , Inseticidas/metabolismo , México , Ostreidae/metabolismo , Resíduos de Praguicidas/metabolismo , Projetos Piloto , Bifenilos Policlorados/análise , Bifenilos Policlorados/metabolismo , Poluentes Químicos da Água/metabolismoRESUMO
Laboratory experiments were conducted at different salinities (35, 26 and 17/1000) to determine accumulation and depuration rates of the organochlorine compound aldrin by the oyster Crassostrea rhizophorae, Ciénaga Grande de Santa Marta (Colombian Caribbean). Residual levels were detected in tissues after 24 hours of exposure, showing increases directly related to the exposure concentration. For all the exposure concentrations the highest retention values were measured at 26/1000 salinities, followed by 17/1000, and the lowest values at the highest salinity. The highest bioconcentration values were 96115.5 (at 26/1000), 37938.9 (at 17/1000), and 22605.1, (35/1000) times the environmental concentration. The depuration process varied across salinity levels. At 26/1000 there was a clear decrease in the residual levels during the first five days, eliminating in this period the same amount as oysters kept at 17/1000 for 20 days and surpassing the amount eliminated by those kept at 35/1000 for 20 days. A rapid decrease in the amount of residues is followed by a slow elimination of the aldrin remaining in tissues.