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History of Research Project on CCA-Treated Wood Presented January 11, 2001 Coral Gables, Florida

History of Research Project on CCA-Treated Wood Presented January 11, 2001 Coral Gables, Florida. Funding Received from Florida Center for Solid and Hazardous Waste Mngt. Florida Power and Light and more recently from Sarasota County. Research Faculty at U.Miami

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History of Research Project on CCA-Treated Wood Presented January 11, 2001 Coral Gables, Florida

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  1. History of Research Project on CCA-Treated WoodPresented January 11, 2001Coral Gables, 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 Jambeck Carlson • Tim Franklin • Brian Messick • Jin-Kun Song • Kristin Stook • Thabet Tolaymat

  5. Background • CCA-Treated Wood is the most common wood preservative used today (>80% market) • CCA ---> Chromated Copper Arsenate

  6. Background Saltwater Immersion Pole/Pilings Structural Poles Saltwater Splash Above Ground pcf = pounds of CCA per cubic foot of wood

  7. 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

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

  9. Project History

  10. Year 1: Disposal Forecast

  11. 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

  12. 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

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

  14. Year 3 • Alternative Chemicals • Four Promising Alternative Chemicals for CCA: ACQ, CBA, CC, CDDC • All standardized for applications requiring 0.25 & 0.4 pcf Comparable to CCA: efficacy • Leach less As but generally more Cu • Cost 10 to 30% more at retail establishment

  15. 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

  16. Year 3 Supplemental • Leaching of CCA during In-Service Use • Use Sectors for CCA-Treated • Leaching of CCA-treated Wood (unburned) and C&D Debris Wood Mulch Recently Completed Results to be presented today

  17. On-going Sarasota County Project (Innovative Recycling Grants Program) Year 4 & Year 5 (FCSHWM)

  18. Questions?Comments?

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