Grantee Research Project Results
2002 Progress Report: Role of Dietary Exposure for Bioaccumulation and Toxicity of Metals in Aquatic Ecosystems Affected by Mining
EPA Grant Number: R829500C001Subproject: this is subproject number 001 , 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: Role of Dietary Exposure for Bioaccumulation and Toxicity of Metals in Aquatic Ecosystems Affected by Mining
Investigators: Ross, Phillipe
Institution: Colorado School of Mines
EPA Project Officer: Packard, Benjamin H
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 examine the spatial and temporal trends in both dissolved and suspended metal concentrations. These results will be used in the development of the Unit World Model (UWM). This project has investigated copper, iron, manganese, and zinc in the dissolved and suspended phases in the North Fork of Clear Creek (NFCC) in Colorado. Acid mine drainage (AMD) enters the creek and results in high concentrations of heavy metals, including iron, zinc, copper, and manganese in the water and the associated sediments.
Progress Summary:
Iron is present in the NFCC system nearly entirely in the particulate phase and iron oxyhydroxides are observed to dominate the suspended sediments present in NFCC. In situ precipitation of iron oxyhydroxides appears to occur during low flows, and it is especially prevalent in locations close to AMD inputs. Copper also is present to a significant extent in the suspended sediments. In contrast, manganese is essentially only present as a dissolved phase. Zinc is present in both the dissolved and particulate phases with no clear trend. These results are consistent with the known behavior of metals in AMD. Copper is known to be more readily adsorbed than zinc. Manganese is problematic, as it has been shown to be difficult to remove from AMD.
During high flow, the suspended sediments likely are principally derived from the flocculated bed sediments. The amount of suspended sediments may represent an equilibrium between resuspension and flocculation/settling, which is controlled by the hydrologic conditions. Elevated concentrations of metals associated with suspended sediments are transported during high flows, especially during rain events. Colloids dominate the suspended sediment during lower flow; these may be formed by precipitation in the water column. Colloids have been seen to be present during low flow conditions at various areas in the creek. These colloids are likely contributing to the increased mass percent of suspended sediment in the less than 1 μm fraction during low flow sampling dates.
Future Activities:
This project has been completed.
Journal Articles on this Report : 3 Displayed | Download in RIS Format
Other subproject views: | All 3 publications | 3 publications in selected types | All 3 journal articles |
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Other center views: | All 4 publications | 4 publications in selected types | All 4 journal articles |
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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) |
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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) |
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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) |
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Supplemental Keywords:
dissolved and suspended phases, metal concentrations, metals, acid mine drainage, AMD, dissolved and particulate phases, sediments, bioaccumulation, toxicity, aquatic ecosystems, Colorado, CO, iron oxyhydroxides, iron, copper, zinc, manganese,, RFA, Scientific Discipline, INTERNATIONAL COOPERATION, Waste, Geochemistry, Hazardous Waste, Ecological Risk Assessment, Ecology and Ecosystems, Hazardous, fate and transport , PCB, remediation, DDT, aquatic ecosystems, extraction of metals, dietary exposure, bioaccumulation, metal contaminationRelevant Websites:
http://www.ce.udel.edu/CSME/Index.html Exit
Progress and Final Reports:
Original AbstractMain 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
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.
Project Research Results
3 journal articles for this subproject
Main Center: R829500
4 publications for this center
4 journal articles for this center