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

2. Florida Center for Solid and Hazardous Waste Mngt.
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 Arsenate The 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-Wood Removed 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. Develop Tools for Disposal End Management
Year 2
Develop Tools for Disposal End Management
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?

14. Year 2 (continued) Sorting Studies
Untreated
Treated
Sorting Studies
Chemical stains, low capital cost labor intensive
X-ray methods, high capital cost suitable 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. Sarasota County Project
On-going
Sarasota County Project
Year 3, Supplemental
Year 4

18. Questions? Comments?