Download or read book Response of Sediment Bacterial Communities to Polychlorinated Biphenyl PCB Contamination in the Upper Hudson River New York written by Bridget Lee Menasche and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PCB Polychlorinated Biphenyls Cleanup Activities on the Upper Hudson River written by I. G. Carcich and published by . This book was released on 1983 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the fall of 1979 at a similar gathering in New Orleans, I reported that the Hudson River was contaminated with polychlorinated biphenyls (PCBs). Unfortunately, the Hudson river remains contaminated with PCBs and very little has been done to correct this problem. A summary of the distribution of residual PCBs in the Hudson River Basin is presented in Table 1. Anticipating that Federal funds would become available to New York State for the removal of PCB-contaminated sediments, engineering efforts were continued in an attempt to narrow down the dredging systems selections and to finalize the design report for the PCB containment site. At the same time, scientific studies were also continued to focus on refining the extent of the PCB contamination and to evaluate the full impact of the PCBs on the ecology of the river.

Download or read book Trends in Polychlorinated Biphenyl Concentrations in Hudson River Water Five Years After Elimination of Point Sources written by Roy A. Schroeder and published by . This book was released on 1983 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sediment quality and polychlorinated biphenyls in the lower Neponset River Massachusetts and implications for urban river restoration written by and published by DIANE Publishing. This book was released on with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PCB in the Upper Hudson River written by Tracy James Tofflemire and published by . This book was released on 1979 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of Polychlorinated Biphenyls in the Upper Mississippi River written by Columbia National Fisheries Research Laboratory (U.S.) and published by . This book was released on 1978 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polychlorinated Biphenyl Hazards to Fish Wildlife and Invertebrates written by Ronald Eisler and published by . This book was released on 1986 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamics of Polychlorinated Biphenyls in the Upper Mississippi River written by URS Company (Seattle, Wash.) and published by . This book was released on 1978 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PCB in the Upper Hudson River written by Tracy James Tofflemire and published by . This book was released on 1979 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Risk Management Strategy for PCB Contaminated Sediments written by National Research Council and published by National Academies Press. This book was released on 2001-05-07 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a risk-based framework for developing and implementing strategies to manage PCB-contaminated sediments at sites around the country. The framework has seven stages, beginning with problem definition, continuing through assessment of risks and management options, and ending with an evaluation of the success of the management strategy. At the center of the framework is continuous and active involvement of all affected parties-particularly communities-in the development, implementation, and evaluation of the management strategy. A Risk-Management Strategy for PCB-Contaminated Sediments emphasizes the need to consider all risks at a contaminated site, not just human health and ecological effects, but also the social, cultural, and economic impacts. Given the controversy that has arisen at many PCB-contaminated sites, this book provides a consistent, yet flexible, approach for dealing with the many issues associated with assessing and managing the risks at Superfund and other contaminated sites.

Download or read book Polychlorinated Biphenyl Contamination in Two River Systems written by Terese A. Forster and published by . This book was released on 1987 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Trends in Concentrations of Polychlorinated Biphenyls in Fish Tissue from Selected Sites in the Delaware River Basin in New Jersey New York and Pennsylvania 1969 98 written by Karen Riva-Murray and published by . This book was released on 2003 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Soil Bacterial Communities Involved in Polychlorinated Biphenyl Remediation written by Ekawan Luepromchai and published by . This book was released on 2001 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book PCB in the Upper Hudson River written by Tracy James Tofflemire and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement and Modeling of Polychlorinated Biphenyl Availability from Contaminated Sediment and Evaluation of Ecosystem Recovery written by Elisabeth Marie-Louise Janssen and published by Stanford University. This book was released on 2010 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research comprises measurement and modeling of polychlorinated biphenyl (PCB) bioaccumulation from contaminated sediments and the evaluation of an in-situ sorbent amendment with activated carbon (AC) to allow ecosystem recovery. Laboratory bioassays with the deposit feeding polychaete Neanthes arenaceodentata, showed that PCB uptake from the aqueous phase accounted for less than three percent of the total uptake. High sediment ingestion rates and fast bioaccumulation of PCBs exceeding sediment concentration within 14 days of exposure suggest that deposit feeders are promising test organisms to evaluate local sediment conditions. A biodynamic model that described bioaccumulation by a mass balance approach of contaminant influx and efflux was parameterized for this polychaete. The model allows the prediction of tissue concentrations and facilitates the understanding of exposure pathways. Subsequently, the effects of an AC-amendment to sediment from a PCB-contaminated site at Hunters Point within the San Francisco Bay, California, were evaluated by employing caged deposit-feeders, along with polyoxymethylene (POM) samplers using parallel in situ and ex situ bioassays with homogenized untreated or AC-amended sediment. The AC-amendment reduced bioaccumulation by 90% in the laboratory and by 44% in parallel field tests with treated and untreated sediment. In-situ measurements with passive pore water samplers showed that PCB uptake was greater for samplers placed in the surface sediment compared to the underlying AC-amendment. The tests revealed three factors that influenced the in-situ bioassays: 1. AC-amendment significantly reduces bioavailability under laboratory and field conditions; 2. Deposit-feeding organisms exhibit less PCB uptake from untreated sediment when feeding is reduced; and 3. Sediment deposition within test cages in the field partially masks the benefit of underlying AC-amended sediment and emphasizes the need of area-wide considerations when assessing contaminated sediment management and remediation strategies. Parallel ex-situ and in-situ bioassays in combination with passive sampler measurements can tease apart field influences on PCB exposure. These tests should accompany each other to evaluate in-situ exposure and the effectiveness of remediation alternatives. This research further focused on pollution-induced changes of the benthic community at Hunters Point and the evaluation of the expected recovery potential after an AC-amendment for in-situ sediment remediation. The benthic community composition was compared for the PCB-contaminated site at Hunters Point and 30 reference sites in the San Francisco Bay to evaluate pollution-induced changes. Given the similar number of species, total abundance, and diversity indices between the reference sites and Hunters Point, it could be concluded that the benthic communities did not differ greatly. However, further analysis based on functional traits of the benthic community shows that the community at Hunters Point is deprived of species that may be stressed by the contaminated sediment due to their feeding mode, reproductive mode, or position in the sediment. The benthic community in comparison to reference sites lacks deposit feeders, subsurface carnivores, egg laying species, and species with no/weak protective barrier. Sediment chemistry analysis shows that PCBs are the major risk drivers at Hunters Point and that the reference sites show only ambient levels of PCB contamination. Biodynamic modeling demonstrates how varying exposure and functional feeding strategies affect PCB bioaccumulation, with a deposit feeder accumulating two orders of magnitude more PCBs in its lipids than a facultative deposit feeder and up to three orders of magnitude more than a filter feeder. Modeling scenarios also show that PCB tissue concentrations at Hunters Point are two orders of magnitude higher than at the reference sites. Sediment remediation with a sorbent (activated carbon) amendment at Hunters Point can reduce PCB availability by 85 to 90% under favorable field and treatment conditions. The expected remedial success corresponds to exposure conditions within sediment quality guidelines and the cleanup goal but remains slightly higher than at the reference sites.

Download or read book Distribution of Polychlorinated Biphenyls in the Housatonic River and Adjacent Aquifer Massachusetts written by Frederick B. Gay and published by . This book was released on 1985 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbial catalyzed Reductive Dechlorination of Polychlorinated Biphenyl PCBs in Hudson and Grasse River Sediment shifts of Microorganisms PCB Tracker Pairs and Geochemical Properties written by Yan Xu and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: