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History of Research Project on CCA-Treated Wood Presented July 28, 2000 Florida Dept. of Environmental Protection Talla

History of Research Project on CCA-Treated Wood Presented July 28, 2000 Florida Dept. of Environmental Protection Tallahassee, Florida. Funding Received from Florida Center for Solid and Hazardous Waste Mngt. Florida Power and Light and more recently from Sarasota County.

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History of Research Project on CCA-Treated Wood Presented July 28, 2000 Florida Dept. of Environmental Protection Talla

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  1. History of Research Project on CCA-Treated WoodPresented July 28, 2000Florida Dept. of Environmental ProtectionTallahassee, Florida

  2. Funding Received from Florida Center for Solid and Hazardous Waste Mngt. Florida Power and Light and more recently from Sarasota County

  3. Research Faculty at U.Miami Helena Solo-Gabriele, Ph.D., P.E., Assist. Professor Research Faculty at U.Florida Timothy Townsend, Ph.D., Assist. Professor David Hahn, Ph.D., Assist. Professor (focused on sorting project, LIBS expert)

  4. Students Supported on Project • Sean Bennie • Vandin Calitu • Kelvin Gary • Naila Hosein • Bernine Khan • Monika Kormienko • Jennifer Penha • Catalina Santamaria • Jenna Carlson • Tim Franklin • Brian Messick • Jin-Kun Song • Kristin Stook • Thabet Tolaymat

  5. Background • CCA ---> Chromated Copper ArsenateThe treated wood contains very high concentrations of Cr, Cu, and As • As toxic, known carcinogen • Soil background levels for arsenic in Florida are low • Strict disposal guidelines

  6. Background The Amounts of CCA Used For Different Applications

  7. Why Was this Project Initiated? • High metals concentrations were observed in the ash from wood cogeneration facilities located in Florida

  8. The Quantities will Increase x7 Florida Disposal Statistics 3000 tons of chemical 660 tons As 350 tons chemical 77 tons As

  9. Motivation (con’d)

  10. Project History

  11. Year 1 • Disposal Forecast • Identified Reservoirs for Disposal of CCA • C&D Facilities, wood waste 6% CCA-treated • A significant fraction burned through cogeneration in 1996

  12. CCA-WoodRemoved from Service C&D Debris Recycling Facilities Wood Fuel Facility Ash Processed Wood (6% CCA in 1996) MSW Landfill C&D Landfill Land Application

  13. Year 2 • Leaching Studies, ash • TCLP & SPLP, Hazardous ash when CCA-treated wood represents 5% of wood burned • Solvents can extract metals from ash, citric acid very promising (40 to 100% As removed) ------> Explore Potential Recycling? Develop Tools for Disposal End Management

  14. Year 2 (continued) Untreated Treated • Sorting Studies • Chemical stains, low capital costlabor intensive • X-ray methods, high capital costsuitable for on-line system

  15. Year 3 • Alternative Chemicals • Four Promising Alternative Chemicals for CCA: ACQ, CBA, CC, CDDC • Most standardized for applications requiring 0.25 & 0.4 pcf CCA (Will account for approximately 60% of the treated wood volume and 20% of the chemical weight (Florida).

  16. Year 3 (Continued) • Disposal-End Management • Field Demonstration of Sorting Technologies Stains suitable for sorting small quantities of wood • Evaluation of Pyrolysis Technology Appears promising for ultimate disposal • Resource book for Wood Disposal Sector Should be distributed

  17. On-going Sarasota County Project Year 3, Supplemental Year 4

  18. Questions?Comments?

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