Sediment Issue Measuring Contaminant Resuspension Resulting from Sediment Capping
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In-situ Sorbent Amendments: A New Direction in Contaminated Sediment Management
A sediments form the ultimate repositories of past and ongoing discharges of hydrophobic organic compounds (HOCs) such as polychlorinated biphenyls (PCBs), many pesticides, and dioxins, as well as mercury (Hg) and methylmercury (MeHg). These sediment-bound pollutants serve as longterm exposure sources to aquatic ecosystems. Approximately 10% of the sediment underlying the United States' surface...
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/n-situ capping, the placement of a subaqueous covering or cap of clean isolating material over an in-situ deposit of contaminated sediment, is a potentially economical and effective approach for remediation of contaminated sediment. A number of sites have been remediated by in-situ capping operations worldwide. EPA has developed detailed guidelines for planning, design, construction, and monit...
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In this study, a stand-alone sediment and contaminant model, SEDDEER (Sediment Deposition and Erosion), is presented. The model simulates one water box and underlying (multiple) sediment bed layers, and was developed for incorporation into water quality models. The processes incorporated in the model are: settling and deposition, resuspension, equilibrium adsorption/desorption, sediment-water i...
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