Sources des données et méthodes pour les l'indicateurs de polybromodiphényléthers (PBDE) dans les poissons et les sédiments PDF Download
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Author:
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ISBN: 9781100997674
Category : Environmental indicators
Languages : fr
Pages :
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Author:
Publisher:
ISBN: 9781100997674
Category : Environmental indicators
Languages : fr
Pages :
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Book Description
Author:
Publisher:
ISBN: 9780660231457
Category : Environmental indicators
Languages : fr
Pages : 9
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Author:
Publisher:
ISBN: 9780660275215
Category : Environmental indicators
Languages : fr
Pages : 18
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Les polybromodiphényléthers (PBDE) sont utilisés comme additifs ignifuges dans divers produits tel que des matériaux de construction, des plastiques et des textiles. Ce sont des substances toxiques qui demeurent dans l'environnement pendant de longues périodes après leur rejet. Ils s'accumulent dans les organismes vivants, comme les poissons, les phoques et les oiseaux, et ont un effet nocif sur la santé et la biodiversité des espèces. Bien que les PBDE ne soient pas fabriqués au Canada, ils peuvent pénétrer dans l'environnement lors de l'élimination d'articles contenant des PBDE. Ces indicateurs évaluent les concentrations de PBDE dans les poissons et les sédiments par rapport aux Recommandations fédérales pour la qualité de l'environnement.--Document.
Author: K. L. Kimbrough
Publisher:
ISBN:
Category : Bivalves
Languages : en
Pages : 96
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This report represents the first national assessment of PBDEs in the U.S. coastal zone. Results suggest that they are widely distributed nationally. Several regions, including the northern Mid-Atlantic, central Gulf of Mexico, Southern California, Pacific Northwest and the Great lakes have elevated PBDE concentrations compared with other coastal regions. Furthermore, PBDE concentrations are positively correlated with human population density along the U.S. coastline. The national and regional perspectives provided herein are intended to support research, local monitoring, and to assist resource managers and policy makers tasked with making regulatory decisions about these contaminants.
Author: L. Webster
Publisher:
ISBN: 9788774820758
Category : Chemical oceanography
Languages : en
Pages : 0
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Author:
Publisher:
ISBN:
Category : Diphenyl ethers
Languages : en
Pages : 628
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Author:
Publisher:
ISBN: 9781100255255
Category : Environmental indicators
Languages : en
Pages : 7
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Author: Yonghong Zou
Publisher:
ISBN:
Category : Polychlorinated biphenyls
Languages : en
Pages : 650
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Author: Candice Simmons
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Polybrominated diphenyl ethers (PBDEs) are a widely used class of flame retardants that are important sources for contamination in the marine environment. Sediments serve as a large reservoir for PBDEs due to their large sorption capacity. This research assessed the presence and distribution of PBDEs in Hillsborough Bay, a subdivision of Tampa Bay, FL, by determining levels in surface sediment samples, creating a historical profile of the contaminant in a sediment core taken from within the bay, and investigating sediment characteristics that control their distribution. Compositional patterns and temporal distributions of 8 of the 209 congeners of PBDEs (BDE-28, -47, -99, -100, -153, -154, -183 and 209) were determined in sediment surface samples and a sediment core collected throughout the study area. Contaminant concentrations varied spatially due to proximity to sources and the spatial variability of physical processes that suspend or remove contaminants from the water column. Concentrations in the bay also varied in time with factors such as wind, precipitation, and subsequent freshwater runoff. PBDE contamination in surficial sediments from various regions of Tampa Bay is not well correlated with sediment grain size or organic matter content, but these factors may be more important in suspended sediments which may control the fate of these contaminants in the bay. The results from this investigation can be used in understanding the extent of PBDE pollution, identifying sources, as well as implementing management strategies for Hillsborough Bay.
Author:
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ISBN:
Category :
Languages : fr
Pages : 58
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