Accession Number : ADA323505
Title : Modeling Marine Exposure to Polychlorinated Biphenyls from Sunken Ships.
Descriptive Note : Master's thesis,
Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
Personal Author(s) : Wendt, Charles N.
PDF Url : ADA323505
Report Date : DEC 1996
Pagination or Media Count : 123
Abstract : In the past, the U.S. Navy has routinely conducted SINKing EXercises (SINKEX) for training, weapon effectiveness tests, and economic disposal of aging assets. Recent concern over polychlorinated biphenyl (PCB) chemicals aboard such target vessels has resulted in a suspension of SINKEX. The U.S. Navy has approximately 200 vessels currently requiring such disposal. Environmental legislation and health concerns preclude selling such vessels to foreign governments or scrapping. This work attempted to model the fate and transport of these PCBs by examining their transport to coastal water and their accumulation in the marine food chain. The model includes biodegradation, upwelling, partitioning of PCBs to sediment, sediment transport, bioaccumulation, biomagnification, and biological migration. Seasonal fluctuations in marine biomass and storm activity and how this affects PCB concentrations is also examined. The model uses a four trophic level approach for the marine food chain. A total of 55 runs, each simulating a 50 year period, were conducted. Model output and subsequent sensitivity analysis of parameters indicate that the potential for adverse impact to the marine ecosystem is minimal.
Descriptors : *POLYCHLORINATED BIPHENYLS, *SUNKEN SHIPS, TEST AND EVALUATION, COASTAL REGIONS, AGING(MATERIALS), ECONOMICS, GOVERNMENT(FOREIGN), EXPOSURE(GENERAL), PARAMETERS, WATER, SEDIMENT TRANSPORT, SEASONAL VARIATIONS, WEAPON SYSTEM EFFECTIVENESS, TRANSPORT, STORMS, ECOSYSTEMS, ENVIRONMENTAL MANAGEMENT, DISPOSAL, ACCUMULATION, BIODEGRADATION, UPWELLING, BIOMASS CONVERSION, FOOD CHAINS, MALNUTRITION.
Subject Categories : Polymer Chemistry
Distribution Statement : APPROVED FOR PUBLIC RELEASE