Data Sources and Methods for the Polybrominated Diphenyl Ethers (PBDEs) in Fish and Sediment Indicators PDF Download
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Author:
Publisher:
ISBN: 9781100255255
Category : Environmental indicators
Languages : en
Pages : 7
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Book Description
Author:
Publisher:
ISBN: 9781100255255
Category : Environmental indicators
Languages : en
Pages : 7
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Book Description
Author: K. L. Kimbrough
Publisher:
ISBN:
Category : Bivalves
Languages : en
Pages : 96
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Book Description
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:
Publisher:
ISBN: 9780660332772
Category : Environmental indicators
Languages : en
Pages : 19
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Book Description
Author: L. Webster
Publisher:
ISBN: 9788774820758
Category : Chemical oceanography
Languages : en
Pages : 0
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Book Description
Author: Patrick William Bradley
Publisher:
ISBN:
Category : Polybrominated diphenyl ethers
Languages : en
Pages : 192
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Book Description
Author: Candice Simmons
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
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: Anna Palm
Publisher: Nordic Council of Ministers
ISBN: 928931074X
Category : Nature
Languages : en
Pages : 81
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Book Description
Author:
Publisher:
ISBN:
Category : Environmental indicators
Languages : en
Pages : 1
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Book Description
Author:
Publisher:
ISBN:
Category : Diphenyl ethers
Languages : en
Pages : 628
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Book Description
Author: Joseph J. Bautista
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Conventional flame retardants of polybrominated diphenyl ethers (PBDEs) are harmful endocrine disrupters that may endure in the environment and experience long range transport (LRT) to areas far from their sources. Despite a gradual phasing out of PBDEs as flame retardants by the Stockholm Convention and other legislation, humans and the environment are still exposed. Recently, natural methoxy and hydroxyl analogues of PBDEs, MeO-BDEs and OH-BDEs, have been discovered in marine environments and are seasonally associated with phytoplankton primary production that may determine how they contribute to the general persistent organic pollutant (POP) abundance as environmental toxicants. Aerosol mechanisms may link these marine pools to the atmosphere and to the global biosphere by LRT on aerosols. Consumption of biota contaminated with PBDEs and their natural analogues may act as a pathway for human exposure. The optimization of PBDE and MeO-BDE extraction and analysis is essential to obtain accurate and precise results and improve method efficiency. Approaches to optimize several aspects of PBDE analysis are described here, along with new techniques for aerosol sampling. The efficacy of several novel internal standards for PBDE and MeO-BDE analysis by gas chromatography coupled to mass spectrometry with electron capture negative ionization (GC-ECNI-MS) is assessed. This is achieved through evaluation of standard reference material household dust and Atlantic cod liver with standard addition, internal calibration, and external calibration. A Micro Orifice Uniform Deposition Impactor (MOUDI) instrument collected aerodynamic aerosol samples in the marine boundary layer. We observe MeO-BDEs in atmospheric aerosols for the first time. We present their atmospheric levels and assessed their sources and potential for LRT based on their aerosol size distribution. We also examine PBDE and MeO-BDE levels in fish livers from Atlantic cod (Gadus Morhua) and Greenland halibut/turbot (Scophthalmus maximusfish). These are traditional Newfoundland and Labrador (NL) fishery stocks and are also known to harbor POPs. These fish samples were used to monitor PBDE and MeO-BDE distribution coastal regions of NL.
