Grantee Research Project Results

2002 Progress Report: The Role of Organic Matter and Metal Oxides in the Retention of Trace Metals by Soil and Suspended Particles

EPA Grant Number: R829500C002
Subproject: this is subproject number 002 , established and managed by the Center Director under grant R829500
(EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
Center: Center for the Study of Metals in the Environment
Center Director: Allen, Herbert E.
Title: The Role of Organic Matter and Metal Oxides in the Retention of Trace Metals by Soil and Suspended Particles
Investigators: Allen, Herbert E.
Institution: University of Delaware
EPA Project Officer: Aja, Hayley
Project Period: April 1, 2002 through March 31, 2005
Project Period Covered by this Report: April 1, 2002 through March 31,2003
RFA: Targeted Research Center (2006) Recipients Lists
Research Category: Targeted Research , Hazardous Waste/Remediation

Objective:

The objective of this research project is to develop models to predict cadmium (Cd), copper (Cu), nickel (Ni), and zinc (Zn) uptake and release from soil particles into the soil solutions. The models focus on kinetics aspects, and will essentially improve the existing approaches based on equilibrium assumptions. The effect of soil properties (organic matter, oxides, metal loading, etc.) and solution composition (pH, dissolved organic matter, and Ca content) on Cd, Cu, Ni, and Zn release will be studied to find the necessary relationships and to evaluate the parameters of the model. Key soil and solution properties will be selected to use the minimal number of input parameters providing reasonable accuracy of predictions. The developed models will form an important component part of the Unit World Model of metal behavior in the environment.

Progress Summary:

Initial studies have been conducted for the desorption of Cu and Zn added to two soils. A stirred-flow method, which minimizes diffusion effects and readsorption phenomena by effective mixing in the reaction chamber and continuously removing desorbed products from solution, was used to study the Cu and Zn release from the soil particles. A first-order equation described the kinetics of Cu and Zn desorption from soils: q(t) = q₁*(1-exp(-k_d*t)+ q₂. The total desorbable metal is q₁ + q₂, and k_d is the desorption rate coefficient.

Lowering pH increased the total desorbable amount of both copper and zinc. A linear relationship was found for the total desorbable amount of metal as a function of the pH. The fraction of the copper released generally is less than 10 percent, while for zinc, it is greater than 50 percent. The addition of dissolved organic matter enhanced the release of copper, but not zinc. The rate constant for the release of copper was linearly correlated to the concentration of dissolved organic matter.

Future Activities:

This project has been completed.

Journal Articles on this Report : 3 Displayed | Download in RIS Format

Publications Views
Other subproject views:	All 3 publications	3 publications in selected types	All 3 journal articles
Other center views:	All 4 publications	4 publications in selected types	All 4 journal articles

Publications
Type	Citation	Sub Project	Document Sources
Journal Article	Field LJ, Macdonald DD, Norton SB, Ingersoll CG, Severn CG, Smorong D, Lindskoog R. Predicting amphipod toxicity from sediment chemistry using logistic regression models. Environmental Toxicology and Chemistry 2002;21(9):1993-2005.	R829500 (2002) R829500C001 (2002) R829500C002 (2002) R829500C003 (2002) R829500C004 (2002) R829500C005 (2002) R829500C006 (2002) R829500C007 (2002)	Abstract from PubMed
Journal Article	Paquin PR, Gorsuch JW, Apte S, Batley GE, Bowles KC, Campbell PGC, Delos CG, Di Toro DM, Dwyer RL, Galvez F, Gensemer RW, Goss GG, Hogstrand C, Janssen CR, McGeer JC, Naddy RB, Playle RC, Santore RC, Schneider U, Stubblefield WA, Wood CM, Wu KB. The biotic ligand model: a historical overview. Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology 2002;133(1-2):3-35.	R829500 (2002) R829500C001 (2002) R829500C002 (2002) R829500C003 (2002) R829500C004 (2002) R829500C005 (2002) R829500C006 (2002) R829500C007 (2002)	Abstract from PubMed Full-text: Science Direct Full Text Exit Other: Science Direct PDF Exit
Journal Article	Santore RC, Mathew R, Paquin PR, DiToro DM. Application of the biotic ligand model to predicting zinc toxicity to rainbow trout, fathead minnow, and Daphnia magna. Comparative Biochemistry and Physiology Part C: Toxicology & Pharmacology 2002;133(1-2):271-285.	R829500 (2002) R829500C001 (2002) R829500C002 (2002) R829500C003 (2002) R829500C004 (2002) R829500C005 (2002) R829500C006 (2002) R829500C007 (2002)	Abstract from PubMed Full-text: Science Direct Full Text Exit Other: Science Direct PDF Exit

Supplemental Keywords:

organic matter, metal oxides, trace metals, soil, soil particles, desorption, dissolved organic matter, DOM, cadmium, Cd, copper, Cu, nickel, Ni, zinc, Zn,, RFA, Scientific Discipline, INTERNATIONAL COOPERATION, Waste, Geochemistry, Hazardous Waste, Ecological Risk Assessment, Ecology and Ecosystems, Hazardous, contaminated sediments, fate and transport , contaminated soil, remediation, Zinc, copper, extraction of metals, cadmium, bioaccumulation

Relevant Websites:

http://www.ce.udel.edu/CSME/Index.html Exit

Progress and Final Reports:

Original Abstract

2003

Final

Main Center Abstract and Reports:

R829500 Center for the Study of Metals in the Environment

Subprojects under this Center: (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).
R829500C001 Role of Dietary Exposure for Bioaccumulation and Toxicity of Metals in Aquatic Ecosystems Affected by Mining
R829500C002 The Role of Organic Matter and Metal Oxides in the Retention of Trace Metals by Soil and Suspended Particles
R829500C003 Developing a Model to Predict the Persistence of Metals in Aquatic Environments
R829500C004 Effects of Dietary Metal Exposure on Fish and Aquatic Invertebrates
R829500C005 Aquatic Toxicity and Exposure Assessment
R829500C006 Development of a Model to Predict the Bioavailability of Metals to Soil Invertebrates
R829500C007 Bioaccumulation and Toxicity of Dietborne Particulate Metals to Benthic Invertebrates

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The perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.