Numerous Superfund sites around the United States are contaminated with carcinogenic and suspected carcinogenic hazardous compounds. For many communities these sites threaten existing or potential sources of drinking water and surface waters. One technology for removing and controlling these hazards associated with aquifers is in situ bioremediation. We propose a project addressing a bioremediation of chlorinated aliphatic contaminants at hazardous waste sites. The study, an extension of present work by our multi-investigator team, will investigate key issues in understanding and applying bioremediation in contaminated aquifers, Basic microbial processes of reductive dechlorination of chloroethenes and anaerobic and aerobic oxidation of less chlorinated ethenes are not understood sufficiently to accurately predict the extent and rate of these processes at chlorinated ethenes are not understood sufficiently to accurately predict the extent and rate of these processes at specific sites. We propose studies to understand when the various bioremediation activities can occur and to find methods to measure their presence and rates. We will examine the anaerobic reductive transformations of perchloroethylene (PCE), trichloroethylene (TCE) and the anaerobic and anaerobic oxidation of TCE, cis-1,2- dichloroethene (cDCE) and vinyl chloride (VC). The studies include applications of molecular techniques for characterization of enrichments and of aquifer microbial communities, and they include laboratory studies to develop basic understanding of the microbial processes, their rates and their possible biostimulation. Prediction of bioremediation needs further development of modeling tools, incorporating experimental results on biodegradation mechanisms and rates, in order to predict natural attenuation. and biostimulation at contaminated sites. Our effort will be conducted using a contaminated field site as the source of material used in our laboratory experiments and as the site for the development and testing of our methods and models.

Project Start
2002-04-01
Project End
2003-03-31
Budget Start
Budget End
Support Year
16
Fiscal Year
2002
Total Cost
$222,045
Indirect Cost
Name
University of Washington
Department
Type
DUNS #
135646524
City
Seattle
State
WA
Country
United States
Zip Code
98195
Criswell, Susan R; Warden, Mark N; Searles Nielsen, Susan et al. (2018) Selective D2 receptor PET in manganese-exposed workers. Neurology 91:e1022-e1030
Meador, James P; Yeh, Andrew; Gallagher, Evan P (2018) Adverse metabolic effects in fish exposed to contaminants of emerging concern in the field and laboratory. Environ Pollut 236:850-861
Ma, Eva Y; Heffern, Kevin; Cheresh, Julia et al. (2018) Differential copper-induced death and regeneration of olfactory sensory neuron populations and neurobehavioral function in larval zebrafish. Neurotoxicology 69:141-151
Heffern, Kevin; Tierney, Keith; Gallagher, Evan P (2018) Comparative effects of cadmium, zinc, arsenic and chromium on olfactory-mediated neurobehavior and gene expression in larval zebrafish (Danio rerio). Aquat Toxicol 201:83-90
Racette, Brad A; Gross, Anat; Criswell, Susan R et al. (2018) A screening tool to detect clinical manganese neurotoxicity. Neurotoxicology 64:12-18
Barrett, P M; Hull, E A; King, C E et al. (2018) Increased exposure of plankton to arsenic in contaminated weakly-stratified lakes. Sci Total Environ 625:1606-1614
Rooney, James P K; Woods, Nancy F; Martin, Michael D et al. (2018) Genetic polymorphisms of GRIN2A and GRIN2B modify the neurobehavioral effects of low-level lead exposure in children. Environ Res 165:1-10
Chang, Yu-Chi; Cole, Toby B; Costa, Lucio G (2018) Prenatal and early-life diesel exhaust exposure causes autism-like behavioral changes in mice. Part Fibre Toxicol 15:18
Criswell, Susan R; Nielsen, Susan Searles; Warden, Mark et al. (2018) [18F]FDOPA positron emission tomography in manganese-exposed workers. Neurotoxicology 64:43-49
Wang, Hao; Zhang, Liang; Abel, Glen M et al. (2018) Cadmium Exposure Impairs Cognition and Olfactory Memory in Male C57BL/6 Mice. Toxicol Sci 161:87-102

Showing the most recent 10 out of 455 publications