Organic Chemicals in Sediments from the Lower Chesapeake Bay

Many of the toxic organic chemicals affecting the marine environment are hydrophobic and associate with sediments. Sediments can accumulate the substances over long intervals and store them after the original source of the toxic material has been eliminated. Contaminated sediments can provide small but damaging amounts of the to.xicant to the overlying water for decades. For example, more than 10 years after the discovery of Kepone in the James River, Virginia, much of the James\u27 fisheries ·is still closed because Kepone levels are above federal action levels.https://scholarworks.wm.edu/vimsbooks/1166/thumbnail.jp

Trace organic analyses of effluent waters from a model slurry pipeline carrying Appalachian bituminous coal : final report

Effluent waters from a model coal slurry pipeline have been analyzed for trace dissolved organic compounds. The model pipeline was operated under conditions simulating those proposed for a slurry pipeline from the region of Bristol to Hampton Roads, Virginia. Acidic, neutral and basic organic compounds in the separated waters were determined. Concentrations of individual compounds detected were generally less than 0.5 ppb and never exceeded 6 ppb. Adsorption experiments using coal slurry sorbents indicate that coal particles act as sorbing surfaces under coal slurry pipeline transport conditions

Emerging Contaminants in Virginia

This Article summarizes the rise of emerging contaminants in waterways in Virginia and nationwide, and how they affect ecological and human health. First, we review the scientific discovery of chemicals that alter hormone systems, reproductive and developmental processes and how these were discovered in waterways. We go on to explain the current state of emerging contaminant regulations, noting that few states have a clear understanding of what chemicals are discharged into surface waters. The Environmental Protection Agency (EPA) has no national effort in this area, despite congressional interest and action. Finally, we make recommendations for future emerging contaminant control and monitoring

Richmond Crater James River Water Quality Management Program, final report 1984-85 and summary, toxic organics in sediments : a final report to Richmond Regional Planning District

The following report contains detailed results of analyses of sediment grabs and cores from the James and Appomattox rivers and some nearby locations for a spectrum of organic toxics. Some data has been previously reported in interim progress reports, but will be included for completeness. A study of variability of replicate samples taken at a single station (JR4). not included in the proposal, presents possible limitations of interpretation of temporal and station to station results. Finally, a comprehensive summary of toxic organics in the sediments of the James River and certain tributarjes over a two-year period will be presented

LMFBR steam generator development: duplex bayonet tube steam generator. Volume II

This report represents the culmination of work performed in fulfillment of ERDA Contract AT(11-1)-2426, Task Agreement 2, in which alternate steam generator designs were developed and studied. The basic bayonet tube generator design previously developed by C-E under AEC Contract AT(11-1)-3031 was expanded by incorporating duplex heat transfer tubes to enhance the unit's overall safety and reliability. The effort consisted of providing and evaluating conceptual designs of the evaporator, superheater and reheater components for a large plant LMFBR steam generator (950 MWt per heat transport loop). (auth

Potential Effects of Endocrine Disrupting Compounds on Bivalve Populations in Chesapeake Bay: A Review of Current Knowledge and Assessment of Research Needs

Numerous compounds in the environment interfere with normal endocrine function in humans and other animals. These compounds, which include heavy metals, a wide variety of anthropogenic organic compounds, steroids and steroid-mimicking compounds, are collectively termed endocrine disrupting compounds (EDCs). Over the past 20 years, research on the impacts of EDC exposure has identified a range of effects on growth, development, and reproduction in humans and wildlife

Polynuclear hydrocarbons in sediments and clams in the vicinity of a refinery outfall

The objectives of this study were: 1) to determine whether substances present in refinery process water are found in adjacent sediments and bivalves 2) to determine the concentrations of compounds detected 3) to identify compounds that may have adverse effects on marine animals or their human consumers

Polynuclear hydrocarbons in sediments and clams in the vicinity of a refinery outfall

The objectives of this study were: 1) to determine whether certain organic substances (polynuclear aromatic hydrocarbons) present in a refinery process water are found in adjacent sediments and bivalves; and 2) to determine the concentrations of the compounds detected

Hydrocarbon fuel chemistry : sediment water interaction

The objective of this program was to determine the effect of sediments on aqueous solutions of selected United States Air Force (USAF} hydrocarbon fuels. Effects of sediment type, organic carbon content, pH, temperature and salinity on interaction of dissolved hydrocarbons with sediment were studied. The results of this work can be used to estimate the role of sediment hydrocarbon interaction terms in fate models of aqueous systems, such as the Environmental Protection Agency EXAMS model