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

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History of Research Project on CCA-Treated
WoodPresented January 11, 2001Coral Gables,
Florida
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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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• 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)

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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

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Background

• CCA-Treated Wood is the most common wood
  preservative used today (gt80 market)
• CCA ---gt Chromated Copper Arsenate

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

• CCA ---gt 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

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Why Was this Project Initiated?

• High metals concentrations were observed in the
  ash from wood cogeneration facilities located in
  Florida

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Project History
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Year 1 Disposal Forecast
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CCA-WoodRemoved from Service
CD Debris Recycling Facilities
Wood Fuel Facility
Ash
Processed Wood (6 CCA in 1996)
MSW Landfill
CD Landfill
Land Application
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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)
  ------gt Explore Potential Recycling?

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Year 2 (continued)
Untreated
Treated

• Sorting Studies, Laboratory
• Chemical stains, low capital costlabor
  intensive
• X-ray methods, high capital costsuitable for
  on-line system

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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

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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

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Year 3 Supplemental

• Leaching of CCA during In-Service Use
• Use Sectors for CCA-Treated
• Leaching of CCA-treated Wood (unburned) and CD
  Debris Wood Mulch

Recently Completed Results to be presented today
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On-going
Sarasota County Project (Innovative Recycling
Grants Program) Year 4 Year 5 (FCSHWM)
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Questions?Comments?