Download or read book Transport and Fate of Polychlorinated Biphenyls in the Aquatic Environment with Special Emphasis on the Influence of Sediment Organic Matter written by and published by . This book was released on 2000 with total page 50 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 Transport and Fate of Polychlorinated Biphenyls in a Natural System written by Kenneth M. Kuhr and published by . This book was released on 1982 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 and published by . This book was released on 1978 with total page 178 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 Robert F. Breault and published by DIANE Publishing. This book was released on 2004 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterizing Polychlorinated Biphenyl Exposure in Aquatic and Riparian Species of Campus Lake written by Megan Archer and published by . This book was released on 2015 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimating the risk of polychlorinated biphenyls (PCBs) in aquatic systems requires evaluation of exposure, usually based on exhaustive chemical extraction of sediment and potentially exposed organisms and an assessment of toxicity. Remediation can then focus on areas where the exposure leads to the highest risk. Although effective, an approach that estimates exposure, which accounts for bioavailabilty, bioaccumulation, trophic transfer potential, and transport of materials within and out of the waterway, should serve as a more comprehensive environmental assessment. The current study examined exposure of PCBs in several different trophic levels within the Campus Lake ecosystem, Carbondale, Illinois. The source of contamination and the distribution of PCBs among ecosystem components demonstrated contamination within the aquatic portion of Campus Lake and transport out of the aquatic environment to the riparian area. Several media were collected including sediment, emergent insects, spiders, and three species of fish. Sediment extractions demonstrated that PCBs were localized to one small cove and this area served as the source for transfer of PCBs to both aquatic and terrestrial organisms. Single-point 24-h Tenax extractions formed the basis for evaluating the bioavailable component of the sediment-associated PCBs with strong correlations to laboratory-based bioaccumulation assays for oligochaetes and chironomid larvae. Stable isotope data suggested that the source of carbon to the food web was relatively constant. Food web samples of emerging insects, fish, and spiders revealed that the PCBs in Campus Lake were bioavailable and the pattern of the PCB signature among food web components followed typical food web processes. The PCB congener pattern was consistent between emergent midges and spiders demonstrating the transfer of PCBs from aquatic to terrestrial species. The PCB concentrations detected in emerging insects from the contaminated area were on average 25 times greater than those detected in emerging insects from reference sites outside the area of greatest sediment contamination. High PCB concentrations found in several species of fish suggested that despite the localized sediment contamination, fish throughout the lake were exposed. These levels also exceeded the fish consumption advisory criteria. The PCB pattern comparisons suggested that the contaminated sediment was the source of exposure throughout the food web. This approach identified the scope of exposure to organisms, demonstrated bioavailability, and provided a basis for future PCB remediation and subsequent monitoring of Campus Lake. In comparison to studies focused solely on limited sampling of fish for consumption advisory purposes, this approach demonstrated the importance of more comprehensive studies to examine the range of ecosystem exposure even from very limited contamination sources.

Download or read book Dynamics of Polychlorinated Biphenyls in the Upper Mississippi River written by R. N. Dexter and published by . This book was released on 1978 with total page 96 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 Transport Routes of Polychlorinated Biphenyls PCBs in Aquatic Ecosystems written by Per Larsson and published by . This book was released on 1983 with total page 112 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 2001-06-07 with total page 451 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 Bed and Suspended Sediments as Source and Transport Mechanisms for Polychlorinated Biphenyls in the Houston Ship Channel Estuary System written by Nathaniel Luke Howell and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polychlorinated biphenyls (PCBs) and polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) are pollutants of global concern. Though their industrial histories differ, they both represent large classes of chemicals (209 PCBs and 210 PCDD/Fs) that are known for their persistence, bioaccumulative, and toxic (PBT) potentials. Both classes of pollutants are hydrophobic (log Kow > 4.5) and therefore exhibit low water solubility. As a corollary to their strong hydrophobicity, they exhibit high sorptive affinity for biolipids and abiotic organic carbon, both critical environmental matrices which affect overall water quality, ecological risk, and human health. PCBs and PCDD/Fs have been monitored semi-continuously in the Houston Ship Channel for the last ten years because of their higher concentrations in many media. This dissertation examines much of the gathered data in this study and prior studies (more for PCBs than PCDD/Fs) in water, fish, and bed sediment in great detail both spatially and temporally. What is most specifically in view through the analysis is a richer understanding of the role of sediments, in both bed and suspended sediment forms, towards contaminant fate-and-transport and an examination of the differing partitioning behavior between PCDD/Fs and PCBs. Bed and suspended sediment-mediated PCB contamination is examined according to a few major themes--water column suspended to dissolved partitioning, truly dissolved concentrations of PCBs in sediment pore water, contaminant flux of PCBs from a large mass repository in the sediment bed, and detailed and relatively short (1-2 years) fate-and-transport modeling using a developed EFDC model of the estuary. Water column partitioning analysis showed that though PCBs and PCDD/Fs have similar hydrophobicities, PCDD/Fs partition quantitatively higher to suspended particles than PCBs. Another significant finding is that PCBs in a freely dissolved phase, considered to be more of a bioavailable measure of contaminants, can be modeled with reasonable accuracy thus increasing our understanding of environmental risk and the ultimate fate of PCBs currently residing in HSC bed sediment. The developed EFDC model, when combined with the characterized partitioning behavior of PCB congeners in the estuary and the prediction of freely dissolved concentrations will be a key decision-making tool for developing remediation and management strategies.

Download or read book Geohydrology and Possible Transport Routes of Polychlorinated Biphenyls in Haiku Valley Oahu Hawaii written by and published by . This book was released on 1993 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Concentration and Transport of Polychlorinated Biphenyls in the Housatonic River Between Great Barrington Massachusetts and Kent Connecticut 1984 88 written by Kenneth P. Kulp and published by . This book was released on 1991 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fate of Polychlorinated Biphenyls PCBs in Soil Following Stabilization with Quicklime written by Robert L. Einhaus and published by . This book was released on 1991 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polychlorinated Biphenyls and the Environment written by United States. Interdepartmental Task Force on PCBs and published by . This book was released on 1972 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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: