Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 29 for “"contaminated sediment"”.
-
Contaminated sediment transport in Boston Harbor
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1991.
-
Assessing Industrial Contamination of Brockport Creek After Removal of Contaminated Sediment
… Creek and a tributary following removal of contaminated sediment from the tributary in 2002. Before the cleanup, PCB concentrations in sediments ranged from 1, 730 to 34,900 µg/kg; after the cleanup they ranged from 288 to 432 µg/kg, below water quality criteria for aquatic organisms and …
-
Development of a fluvial oil-particle aggregate (OPA) drift simulator to evaluate the fate and transport of contaminated sediment in rivers
… OPA formation algorithms from suspended sediments to an existing model that has the capability of transporting pre-formed OPA with a random walk scheme through unsteady HEC-RAS domains. For the sake of showing the importance of considering OPA formation, a range of parameters were tested …
-
Monitoring and measuring the impacts and environmental implications of flood events on contaminated sediment dispersal in the River Swale catchment, North Yorkshire
… concentrations found in association with the sediments of rivers and in their surrounding floodplains. This thesis investigates the mobilisation, transport and the overbank deposition of sediment-associated heavy metals during flood events on the River Swale, North Yorkshire. This catchment …
-
Uptake and growth effects of polycyclic aromatic hydrocarbons in wetland plants
… the distribution and fate of PAHs in wetland sediments and plants. The effect of PAHs on common salt marsh plants, and the PAH distribution within the plants, sediment, and atmosphere were evaluated to determine if PAHs were transported from the sediment into the plants, and if the PAHs …
-
Remediation of contaminated marine sediment using bentonite, kaolin and sand as capping materials
… is a growing public concern over the issue of sediment contamination resulting from industrial, municipal wastewater, mining activities, and improper use of chemical fertilizer or pesticides. The conventional treatment of contaminated sediment is dredging, but this treatment is expensive and …
-
Treatment of contaminated sediments using reactive cap technology: Characterization and modeling of geotechnical, hydraulic and contaminant transport behavior of cap-sediment systems
… is a promising in-situ remediation solution for contaminated sediment, mainly because it has the potential to reduce costs and environmental impacts when compared to solutions that rely solely on dredging and disposal. Reactive capping mats have been recently used in demonstration projects as a …
-
Multi-omic analysis of contaminated sediments from Contrecoeur, QC on Planorbid snails
… history of industrial development resulted in sediment contamination (by butyltins, heavy metals, and petroleum hydrocarbons), which can be harmful to aquatic and benthic life. Additionally, future development threatens to further exacerbate the contamination in the area. This study examines …
-
Exchange flows in an urban water body: Bayou St. John responses to the removal of flood control structures, future water elevation control, and water quality
… generally remains stratified. Resuspension of contaminated sediment could negatively impact the local ecology but predicted shear stress values did not reach a critical value (0.1 N/m<sup>2</sup>) for resuspension. Removal of the waterfall structure will benefit Bayou St. John by decreasing …
-
A laboratory study of solidification/stabilization technology for contaminated dredged material
Safe disposal of contaminated dredged material has become a significant issue especially as public environmental awareness and concerns increase. Solidification/ stabilization technology potentially may provide for a safer, more effective and more economical means of disposal. This research …
-
Anaerobic transformations of Kepone by denitrifying bacteria
Anaerobic bacteria isolated from Kepone-contaminated sediment were screened for their ability to degrade Kepone under anaerobic conditions. The most extensive degradation was produced by denitrifying bacteria grown on benzoate-nitrate medium. In enrichment cultures, Kepone was transformed more …
-
Temporal and Spatial Variation of Fine Sediment Infiltration in a Gravel-Bed River
Pulses of fine sediment in gravel-bedded rivers can cause extensive fine sediment infiltration (FSI), potentially altering river morphodynamics and aquatic ecosystems. FSI occurs when sand and silt are deposited into void spaces between larger grains at the riverbed. Flume and theoretical modeling …
-
Temporal and Spatial Variation of Fine Sediment Infiltration in a Gravel-Bed River
Pulses of fine sediment in gravel-bedded rivers can cause extensive fine sediment infiltration (FSI), potentially altering river morphodynamics and aquatic ecosystems. FSI occurs when sand and silt are deposited into void spaces between larger grains at the riverbed. Flume and theoretical modeling …
-
Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… Montana over the last c.a. 150 years led to contaminated tailings being distributed along the entire upper Clark Fork River System. The extent of hazardous material distributed along the Clark Fork River is a major concern because the floodplain is a large reservoir of contaminated sediment …
-
Channel Migration and Bank Erosion of the Clark Fork River at Grant-Kohrs Ranch N.H.S., Western Montana
… Montana over the last c.a. 150 years led to contaminated tailings being distributed along the entire upper Clark Fork River System. The extent of hazardous material distributed along the Clark Fork River is a major concern because the floodplain is a large reservoir of contaminated sediment …
-
Effects of heavy metals on the physical activity and survival of freshwater clams
… and deposited over 100 million of cubic yards of contaminated slag, tailings and other mine wastes throughout the Coeur D'Alene (CDA) drainage. After the mines closed, the area was declared a Superfund site by the Environmental Protection Agency and attention has focused on the human health …
-
Quantification of Trapped Diluted Bitumen Droplets in Gravel: an Experimental Study
… Compared to marine systems, the cleanup of oil-contaminated sediment in rivers is more difficult. Hyporheic flow, where surface water flows through the streambed, is one of the contributing factors for sediment contamination, which has received little research attention. Therefore, a series of …
-
Dynamics of particle clouds in ambient currents with application to open-water sediment disposal
Open-water sediment disposal is used in many applications around the world, including land reclamation, dredging, and contaminated sediment isolation. Timely examples include the land reclamation campaign currently underway in Singapore and the Boston Harbor Navigation Improvement Project. Both of …
-
Using passive samplers to assess bioavailability, toxicity, and reactivity of hydrophobic organic chemicals (HOCs)
… from GC × GC analysis of PE equilibrated with contaminated sediment. Empirical observations of accumulation in the Nereis virens polychaete were in good agreement with PE-based predictions for PCBs, but were lower by at least an order of magnitude for other classes of HOCs (such as PAHs) …
-
PAH and PCB distribution in sediment fractions and sorptive phases
… is integral to environmental evaluations of contaminated sediment on every level. The technical and economic feasibility of treatment or beneficial use is a function of the accessibility or separability of the contaminants within the sediment. The magnitude of release to the environment …
Page 1 of 2