... Disturbance of a nonaqueous phase liquid (NAPL) contaminated sediment; for example the loading-induced consolidation after placement of a sediment cap, may result in the release of the NAPL. Organophilic clays are reported as effective media in adsorbing NAPLs and organic contaminants...

... for sound risk-based assessment approaches to support management decisions. More specifically, the sustainable navigation strategy, drawn up under St. Lawrence Action Plan III, explicitly identifies the need to develop sediment quality assessment tools, including those derived from ecotoxicological studies...

... sources including a closed landfill. A 1-month sampling and analysis regime was devised to optimize riverine and estuarine analysis to determine seasonality of contaminant distribution. Between August 2003 and January 2005, contaminant concentrations within the surface sediment of the river and estuarine...

... The management of sediments contaminated with polychlorinated biphenyls (PCBs) is an issue of significant contemporary concern. The application of an in situ cap to isolate and contain the contaminants is a desirable management option that is hindered by a lack of detailed information regarding...

... British Waterways is a public corporation which owns and manages 3220 km of canals and navigable rivers in Britain. Maintaining a safe navigation channel requires the regular removal of large quantities of accumulated sediment (150,000 tons per annum) which is often contaminated with a “cocktail...

... Stabilization/solidification technology (S/S), in which contaminated marine sediments are mixed with cement and other binding agents have shown to be a promising remediation technique. The major advantage of S/S over other contaminated sediments remediation techniques is that dredged material...

... As lake sediments are one of the causes of eutrophication, their removal and effective use has been considered. When they are used as soil in a land, proper permeability is required. However, soil permeability has not completely been understood due to diversity of clays and organic compounds. We...

... trace metal contamination in sediments. Street surface, stream, and lake sediments were collected over a 25-year period and analyzed for total and acid-extractable trace metals (Cu, Fe, Mn, Pb, and Zn). Lead concentrations in all areas have decreased dramatically, directly as a result...

... Electrokinetic technique has been used in sedimentation at mining applications as a volume reduction for slurry tailing wastes. This technique has been used in remediation for environmental application as a potential in-situ remediation method for contaminated soils and wastes. Thus...

... Freeze coring systems were applied for sampling high-water-content sediments or very coarse sediments for a couple of years. At the Free University within the last 20 years different systems were developed and applied for sampling the upper 1.5–2.5 m in an undisturbed stratified way...

... an industrial park that includes airport installations and storage facilities for chemical products. In 1993, a first quality study revealed the presence of some toxic metals in lake sediments. Although, lower levels were found, these analyses were performed at a time where neither standards methods nor quality...

... This study evaluated the use of statistical randomization tests in data analysis regarding heavy metals content in sediments from the Caí River basin (Brazil). During one year, four samplings took place at eleven sites in the Caí River and tributaries. The results showed significant differences...

... Sediments in many harbors and connecting channels of the Great Lakes have been negatively impacted by industrial, agricultural and municipal discharges and by atmospheric deposition. Contaminated sediments may pose risks to both human health and to aquatic environments. All 42 U.S. and Canadian...

... This paper describes a new geocomposite overlay, consisting of filter fabric layers surrounding a chemically reactive core, that is being developed to contain and remediate contaminated, subaqueous sediments. This geosynthetic-based reactive material will provide the same isolation...

.... We have confirmed the presence of oxyPAHs at toxic levels in sediment samples taken from a known contaminated site. Contaminated sediment samples were taken from Hamilton Harbour (Hamilton, Ontario). A reference site from the harbour, known to be free of contaminants was also analyzed. High...

... This paper describes the behaviour of soft soils created by the rapid deposition of a sediment slurry and the mechanisms by which pore fluid escapes from the consolidating bed. Such rapid deposition occurs as a result of dumping dredge spoils at sea or in the case of disposing of mine tailings...

... cm-spaced) mapping of the mass physical properties of soil prior to sample extrusion. automation bulk density core liner geotechnical geoacoustic Lambert attenuation logger robotics sediment soil p-wave sound velocity Robert E. Kayen,1Brian D. Edwards,2 and Homa J. Lee1...

... This paper describes a two weight system using bar and flat shaped weights for measuring depth and detecting sediment at the bottom of slurry-supported excavations. Currently there are no standard depth measurement weights or methods for reliably identifying bottom sediment. Two weights...

... A linear steady state model of the food web linking sediment to piscivorous predators was used to derive ecological risk based clean-up concentrations for mercury in sediment of East Fork Poplar Creek (EFPC), Oak Ridge, TN. The model partitions aquatic invertebrates into two classes based...

... A draft of Environment Canada's “Guidance on Control of Test Precision Using a Spiked Control Sediment Toxicity Test” was reviewed by an international technical subcommittee. Comments were received, assessed, and discussed by members of the project steering committee, at which time...