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Urban Environmental Biogeochemsitry Laboratory

Urban Environmental Biogeochemsitry Laboratory. Chemical and Biological Impacts of Roadway Derived Contaminants Entering Stormwater Retention Systems. S. Lev 1 , R. Casey 1 , E. Landa 2 and J. Snodgrass 1 1 Urban Environmental Biogeochemistry Laboratory, Towson University, Towson, MD

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Urban Environmental Biogeochemsitry Laboratory

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  1. Urban Environmental Biogeochemsitry Laboratory Chemical and Biological Impacts of Roadway Derived Contaminants Entering Stormwater Retention Systems S. Lev1, R. Casey1, E. Landa2 and J. Snodgrass1 1Urban Environmental Biogeochemistry Laboratory, Towson University, Towson, MD 2U.S. Geological Survey, Water Resources Division-National Research Program, Reston, VA

  2. Urban Environmental Biogeochemsitry Laboratory Soils Stormwater Roadway Derived Contaminants (trace metals) Retention Basin Sediments Biota

  3. Red Run watershed Baltimore N

  4. Change in wetland landscape of Red Run Watershed: 1987-2000 Study area

  5. Urban Environmental Biogeochemsitry Laboratory Transport Availability Storage Amphibian Bioassay Monitoring Station 2 XXXXX 9 Owings Mills Blvd. 4 8 3 11 7 6 Watershed scale transport and long term storage 5 10

  6. Urban Environmental Biogeochemsitry Laboratory Project Objectives Field Study • Characterize Cu and Zn speciation in stormwater runoff • Evaluate road dust as a potential source in runoff and retention pond sediments • Determine potential availability of metals in pond sediments • Determine storage of Cu and Zn in pond Laboratory Bioassay • Determine effects of aged tire debris and Zn2+ on wood frog (Rana sylvatica) eggs and larvae

  7. Urban Environmental Biogeochemsitry Laboratory Zn and Cu in Roadway Runoff

  8. Urban Environmental Biogeochemsitry Laboratory Fate of Zn and Cu in Retention Pond 16500 g Zn =73.3 storms 225 g Zn storm-1 73 storms can occur over a 3-4 year period Indicates a loss of Zn into surrounding environment Lost from system 6000 g Cu = 140 storms 43 g Cu storm-1 140 storms can occur over a 7-9 year period Indicates some loss of Cu to surrounding environment

  9. Urban Environmental Biogeochemsitry Laboratory Wood Frog Bioassay Hatching success was significant between clutches (P<0.0001) and moderately significant between treatments (P=0.0442) Significant differences in time to metamorphosis between treatments (P=0.0081). Tire and ZnCl2 were slower than soil, but were not significantly different from each other Accumulation in tissues was significant between treatments (P<0.0001) and all treatments were significantly different from each other Zn Accumulation in Tissues

  10. Urban Environmental Biogeochemsitry Laboratory Transport Availability Storage Amphibian Bioassay Monitoring Station 2 XXXXX 9 Owings Mills Blvd. 4 8 3 11 7 6 Watershed scale transport and long term storage 5 10

  11. 1000 natural Zn background (high flow) 100 Suspended Sediment (mg/L) 10 anthropogenic Zn dominated (low flow) 1 0 5 10 15 20 25 Urban Environmental Biogeochemsitry Laboratory • Research Objectives • - Evaluate metal storage in retention ponds • Assess dissolved and particulate bound metal transport out of the watershed Discharge (cfs)

  12. Urban Environmental Biogeochemsitry Laboratory

  13. roadway derived metals Soil System organic matter pH, soil moisture mineralogy soil weathering physical processes Earthworm abiotic processes ingestion earthworm mixing and vertical transport digestion Earthworm driven chemcial transformations trophic transfer vary through out soil column chemical processes abiotic transformations excretion Earthworm driven transformations Bioaccumulation mortality Urban Environmental Biogeochemsitry Laboratory

  14. Urban Environmental Biogeochemsitry Laboratory 90 Earthworm driven physical weathering 80 Roadway Dust 70 Total Zn (ppm) 60 Soil 50 Earthworm driven chemical weathering 2.0 1.8 1.6 1.4 MgCl2 extractable Zn (ppb) Zn-bearing dust particles 1.2 1.0 0.8 0.6 0.4 Control 1 Control 2 Worms 1 Worms 2

  15. Urban Environmental Biogeochemsitry Laboratory m-SR-XRF Line Scan Zn A B gut A B Cu burrow wall A B section through earthworm in-situ

  16. Urban Environmental Biogeochemsitry Laboratory m-SR-XRF Zn Elemental Map epidermis gut burrow Zn-enriched particles

  17. Urban Environmental Biogeochemsitry Laboratory Soils Stormwater Roadway Derived Contaminants (trace metals) Retention Basin Sediments Biota

  18. Urban Environmental Biogeochemsitry Laboratory Funding Maryland Water Resource Research Center Patuxent Wildlife Research Center USGS NSF-DMR and NSF CHEM Towson University People Kathy Szlavecz (JHU) Tony Lanzirotti (BNL-NSLS) Kim Camponelli Judith Simon Whitney Carroll Amanda Shaw Stephanie Atueyi Liz Wright Casey Jackson Valerie Schmidt Rob Flora Jeff Klupt

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