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Environmental Impact of Arsenic-Free Wood Preservatives vs. CCA: A Comparative Study

This research compares the environmental impacts of wood treated with arsenic-free preservatives against CCA-treated wood, considering factors like preservative residue, appearance, mechanical properties, safety, and cost. The study evaluates impacts on soil, aquatic systems, and landfills to inform wood treatment choices. Previous research methods and waste compositions for simulated landfill scenarios are detailed.

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Environmental Impact of Arsenic-Free Wood Preservatives vs. CCA: A Comparative Study

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  1. Comparison of Environmental Impacts of Wood Treated with Three Different Arsenic-Free Preservatives and CCA Brajesh Dubey Graduate Research Assistant Dept. of Environmental Engineering Sciences University of Florida

  2. Biological deterioration Treatment method Preservative remain in wood Appearance/Odor Mechanical properties Cost Environmental and human safety during normal use Selection of Wood Treatment Chemical

  3. Compare and contrast the potential environmental impact of wood treated with arsenic free preservatives with that from CCA-treated wood Research Objective

  4. ACQ : Alkaline Copper Quaternary CBA : Copper Boron Azole DOT : Disodium Octaborate Tetrahydrate CCA : Chromated Copper Arsenate Pressure Treated Wood To be Evaluated

  5. Impact on soil from pressure- treated wood structures Impact of pressure-treated wood on natural aquatic systems Impact of pressure-treated wood on disposal in landfills Scenarios

  6. Drainage material Soil Geotextile Geonet 2 % slope Sample collection Scenario 1 Deck Setup This sketch is not to scale

  7. Scenario 2 Impact of pressure-treated wood on natural aquatic systems

  8. Wooden blocks of CCA, ACQ, CBA and DOT treated wood will be leached with natural water collected from different water bodies in Florida For comparison these blocks will also be leached with SPLP solution and moderately hard water (Evian) Metals, organic biocides content and toxicity using Algal assay and MetPLATETM will be evaluated in the leachate produced Approach for Scenario 2

  9. Leachate characterization for heavy metals in the leachate produced from co-disposal of pressure-treated wood with other solid waste. Scenario 3

  10. This is a part of another study ACQ Co-disposed with C&D Debris CCA Co-disposed with C&D Debris C&D Control Column Co-disposal of Treated Wood in Landfill Environments

  11. Previous Research

  12. The county provideda large area near apaved road for locating the lysimeters.

  13. The driller used a 3-ft bucket auger.

  14. The hole prior to lysimeter installation. 15 ft deep.

  15. The drill rig was used to place the lysimeters

  16. The annulus of the holes was backfilled with sand.

  17. Thermocouple wires were included for temperature measurement.

  18. Waste Composition for Simulated C&D Landfill

  19. Waste Composition for Co-disposal of ACQ in Simulated C&D Landfill

  20. Waste Composition for Co-disposal of CCA in Simulated C&D Landfill

  21. Loading the Column

  22. Compacting the Waste

  23. Thank you

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