An Investigation of Chemical Transport from Contaminated Sediments through Porous Containment StructuresEPA Grant Number: R825513C008
Subproject: this is subproject number 008 , established and managed by the Center Director under grant R825513
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: HSRC (1989) - South and Southwest HSRC
Center Director: Reible, Danny D.
Title: An Investigation of Chemical Transport from Contaminated Sediments through Porous Containment Structures
Investigators: Reible, Danny D. , Thibodeaux, Louis J. , Valsaraj, Kalliat T.
Institution: Louisiana State University - Baton Rouge
EPA Project Officer: Hahn, Intaek
Project Period: January 1, 1992 through January 1, 1995
Project Amount: Refer to main center abstract for funding details.
RFA: Hazardous Substance Research Centers - HSRC (1989) RFA Text | Recipients Lists
Research Category: Hazardous Substance Research Centers , Land and Waste Management
The focus of this study was to provide a better basis for the estimation of
contaminant release rates from in-water and near shore confined disposal
facilities (CDF) which have been and are used for the disposal of contaminated
dredged material. This focus can be clarified through the three main objectives
for this study: 1) development of an analytical capability for chemical and
dissolved organic carbon measurement; 2) development of a column for sediment
leaching experiments; and 3) the numerical simulation of the significance of
in-dike transport processes. Contaminant transport as a dissolved phase,
colloidally bound phase and particulate bound phase were to be considered. These
processes were to be investigated experimentally using model sediment and dike
materials as well as representative CDF construction and fill material. Further
information on the objectives of this study are outlined below.
Experimental Evaluation of Transport and Dispersion
This work was done in thin layer, large diameter polycarbonate columns. The primary advantage of this column design is large column diameter and short length which maximizes the volumetric flowrate of water through the sample. This is especially important to minimize experiment length for very low permeability samples.
Develop Conceptual/Mathematical Models
Three sets of experiments allowed testing and development of conceptual and mathematical models of seepage in a porous dike structure as a result of water level transients. Both existing sophisticated numerical transient porous media flow models (Tracy, 1973; Barends et al., 1983; Voss, 1984; Black and Craig, 1989) as well as simpler models (Martin et al., 1988; Martin and McCutcheon, 1989)were considered for comparison to the collected data.
Experimental Evaluation of Transport and Dispersion
The columns selected and designed were based on a review of the available column types by Myers e al. (1991). The purpose of the column is to collect fundamental sorption, desorption and leaching rate data on sediment and confined disposal facility dike materials. The media will be either sediment or CDF construction material or a combination of the two. Media used was characterized as to its physical parameters, such as sand, silt, clay and organic content and size classification. Equilibrium partitioning of the contaminants of interest was determined by batch testing
In all experiments, chemical analysis of inoculated chemical compounds was done via solid phase extraction and high performance liquid chromatography. Particulate analysis was done via gravimetric and turbidometric methods. Analysis in the presence of dissolved organic carbon (i.e. the colloidal fraction) was also done by solid phase extraction. Determination of the dissolved organic carbon was performed via a total organic carbon analyzer.
Develop Conceptual/Mathematical Models of Transient Water Level Changes
and Dike Hydraulics and Transport
A two dimensional finite element model was developed to evaluate free surface unsaturated flow in a CDF dike wall. A finite element convection-dispersion transport model was also developed to use the predicted flow field for purposes of predicting chemical movement. Linear, reversible partitioning between water and the sediments are assumed in the model.
Publications and Presentations:Publications have been submitted on this subproject: View all 15 publications for this subproject | View all 392 publications for this center
Journal Articles:Journal Articles have been submitted on this subproject: View all 5 journal articles for this subproject | View all 106 journal articles for this center
Supplemental Keywords:contaminant release, volatilization, and colloids., RFA, Scientific Discipline, Waste, Water, Ecosystem Protection/Environmental Exposure & Risk, Chemical Engineering, Contaminated Sediments, Environmental Chemistry, Analytical Chemistry, Fate & Transport, Hazardous Waste, Ecology and Ecosystems, Environmental Engineering, Hazardous, environmental technology, sediment treatment, hazardous waste management, hazardous waste treatment, risk assessment, fate and transport, mathematical model, contaminated marine sediment, soil and groundwater remediation, biodegradation, contaminated sediment, kinetics, confined disposal facilities, chemical contaminants, contaminated soil, bioremediation of soils, marine sediments, remediation, chemical kinetics, hydrology, biotransformation, currents, anaerobic biotransformation, extraction of metals, technology transfer, heavy metals, bioremediation, aquifer fate and treatment, technical outreach
Progress and Final Reports:
Main Center Abstract and Reports:R825513 HSRC (1989) - South and Southwest HSRC
Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R825513C001 Sediment Resuspension and Contaminant Transport in an Estuary.
R825513C002 Contaminant Transport Across Cohesive Sediment Interfaces.
R825513C003 Mobilization and Fate of Inorganic Contaminant due to Resuspension of Cohesive Sediment.
R825513C004 Source Identification, Transformation, and Transport Processes of N-, O- and S- Containing Organic Chemicals in Wetland and Upland Sediments.
R825513C005 Mobility and Transport of Radium from Sediment and Waste Pits.
R825513C006 Anaerobic Biodegradation of 2,4,6-Trinitrotoluene and Other Nitroaromatic Compounds by Clostridium Acetobutylicum.
R825513C007 Investigation on the Fate and Biotransformation of Hexachlorobutadiene and Chlorobenzenes in a Sediment-Water Estuarine System
R825513C008 An Investigation of Chemical Transport from Contaminated Sediments through Porous Containment Structures
R825513C009 Evaluation of Placement and Effectiveness of Sediment Caps
R825513C010 Coupled Biological and Physicochemical Bed-Sediment Processes
R825513C011 Pollutant Fluxes to Aquatic Systems via Coupled Biological and Physicochemical Bed-Sediment Processes
R825513C012 Controls on Metals Partitioning in Contaminated Sediments
R825513C013 Phytoremediation of TNT Contaminated Soil and Groundwaters
R825513C014 Sediment-Based Remediation of Hazardous Substances at a Contaminated Military Base
R825513C015 Effect of Natural Dynamic Changes on Pollutant-Sediment Interaction
R825513C016 Desorption of Nonpolar Organic Pollutants from Historically Contaminated Sediments and Dredged Materials
R825513C017 Modeling Air Emissions of Organic Compounds from Contaminated Sediments and Dredged Materials title change in last year to "Long-term Release of Pollutants from Contaminated Sediment Dredged Material"
R825513C018 Development of an Integrated Optic Interferometer for In-Situ Monitoring of Volatile Hydrocarbons
R825513C019 Bioremediation of Contaminated Sediments and Dredged Material
R825513C020 Bioremediation of Sediments Contaminated with Polyaromatic Hydrocarbons
R825513C021 Role of Particles in Mobilizing Hazardous Chemicals in Urban Runoff
R825513C022 Particle Transport and Deposit Morphology at the Sediment/Water Interface
R825513C023 Uptake of Metal Ions from Aqueous Solutions by Sediments
R825513C024 Bioavailability of Desorption Resistant Hydrocarbons in Sediment-Water Systems.
R825513C025 Interactive Roles of Microbial and Spartina Populations in Mercury Methylation Processes in Bioremediation of Contaminated Sediments in Salt-Marsh Systems
R825513C026 Evaluation of Physical-Chemical Methods for Rapid Assessment of the Bioavailability of Moderately Polar Compounds in Sediments
R825513C027 Freshwater Bioturbators in Riverine Sediments as Enhancers of Contaminant Release
R825513C028 Characterization of Laguna Madre Contaminated Sediments.
R825513C029 The Role of Competitive Adsorption of Suspended Sediments in Determining Partitioning and Colloidal Stability.
R825513C030 Remediation of TNT-Contaminated Soil by Cyanobacterial Mat.
R825513C031 Experimental and Detailed Mathematical Modeling of Diffusion of Contaminants in Fluids
R825513C033 Application of Biotechnology in Bioremediation of Contaminated Sediments
R825513C034 Characterization of PAH's Degrading Bacteria in Coastal Sediments
R825513C035 Dynamic Aspects of Metal Speciation in the Miami River Sediments in Relation to Particle Size Distribution of Chemical Heterogeneity