Final Report: Uptake of Metal Ions from Aqueous Solutions by SedimentsEPA Grant Number: R825513C023
Subproject: this is subproject number 023 , 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: Uptake of Metal Ions from Aqueous Solutions by Sediments
Investigators: Yiacoumi, Sotira
Institution: Georgia Institute of Technology
EPA Project Officer: Hahn, Intaek
Project Period: January 1, 1996 through January 1, 1997
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 , Nanotechnology , Land and Waste Management
Theoretical and experimental studies for this project were designed to occur simultaneously. Well-characterized sediment particles were selected for batch sorption equilibrium and kinetic experiments, as well as packed-column sorption experiments, using various metal ions. Equilibrium and kinetic parameters were used as the basis to develop a transport model to predict the distribution of metal ions in sediments. In parallel, the diffuse layer potential of the particles were calculated and incorporated in particle interaction models. These models were used to calculate pairwise total potential and coagulation frequency between particles. The coagulation frequency was then incorporated in a particle population dynamics model for calculation coagulation kinetics. All three models; 1) sorption kinetics, 2) transport, and 3) population dynamics, were coupled together.
Well characterized suspensions such as kaolinite and iron oxide hematite) particles were used in this study because of their extensive presence in natural systems and in order to test the theoretical models for metal ion transport and coagulation kinetics. Kaolinite particles were obtained from commercial vendors, while hematite was synthesized in the laboratory by sol-gel methods (Sugimoto et al., 1993). Potentiometric measurements to calculate the particle surface charge were obtained by an automatic titration and pH monitoring system available in the Environmental Engineering Laboratory at Georgia tech. Electrokinetic measurements were obtained by zeta meters. Sorption kinetics and transport were monitored by taking concentration measurements of the solution. An ICP/MS and AA were used to obtain these measurements. Coagulation kinetics were monitored by measuring transient particle size using available size analyzers.
The findings from an experimental and modeling investigation of metal ion sorption onto inorganic colloidal particles are outlined below. Based on preliminary experimental and modeling efforts, it is clear that copper and cadmium ion sorption alters the surface potential of ferric oxide particles. Destabilization of the ferric oxide particles is seen to occur under conditions of suspension pH and ionic strength commonly encountered in natural systems. Modeling studies indicate possibilities of particle aggregation under conditions of metal ion uptake due to alteration of surface electrostatic potential. Experimental work to validate these findings is in progress in our laboratories.
Summary of Results:
Journal Articles on this Report : 3 Displayed | Download in RIS Format
|Other subproject views:||All 5 publications||4 publications in selected types||All 3 journal articles|
|Other center views:||All 392 publications||154 publications in selected types||All 106 journal articles|
||Chen J, Yiacoumi S, Blayeds TG. Equilibrium and kinetic studies of copper adsorption by activated carbon. Separations Technology 1996;6(2):133-146.||
||Chen W, Lakshmanan K, Kan AT, Tomson MB. A program for evaluating dual-equilibrium desorption effects on remediation. Ground Water 2004;42(4):620-624.||
||Subramaniam K, Yiacoumi S, Tsouris C. Effect of copper and cadmium binding on the flocculation of ferric oxide particles. Separation Science and Technology 1999;34(6-7):1301-1318.||
Supplemental Keywords:inorganic colloidal particles, particle coagulation, and sorption., Scientific Discipline, Waste, Ecosystem Protection/Environmental Exposure & Risk, Fate & Transport, Analytical Chemistry, Environmental Monitoring, Ecology and Ecosystems, contaminated sediments, fate and transport, aqueous solutions, hazardous waste, metal ions, sorption experiments, transport, contaminant transport models
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