1. Augmented Sorting of Recovered Wood Waste Using Stain and X-Ray Technologies Recently Awarded by the FDEP Innovative Recycling Grants Program to the Town of Medley

2. Objectives
Evaluate two innovative technologies for identifying and removing CCA-treated wood within recovered wood waste.
PAN Indicator Stain
X-ray Technology (hand-held units)

3. Tasks
Phase I
Sort 10 tons (minimum) of dimensional C&D waste wood using visual methods, PAN stain and XRF unit
Document speed and costs.
Phase II
Picking Line Sorts
No augmentation
With stain
With XRF
Documentation

4. Project Collaborators
Host Facility

5. Why Are New Methods Needed for Sorting?

7. Sorting Technologies (Previous Work)
Chemical Stains
Arsenic Test Kit
Laser (LIBS)
X-ray (XRF)
Time consuming but inexpensive
For a few samples
Suited for on-line applications

8. Chemical Stains Low Capital Cost, Labor Intensive Chemical stains
Chrome Azurol
PAN Indicator**
Rubeanic Acid
Untreated
Treated
Stains Are Not Arsenic Specific

9. On-Line Technologies (Previous Work in Sarasota County)
Laser Induced Breakdown Spectroscopy (LIBS)
X-Ray Flourescence Spectroscopy (XRF)

10. DETECTORS
laser
x-ray

11. X-Ray Fluorescence Technology

12. Theory of X-Ray Fluorescence
Incident X-ray from the analyzer strikes an electron occupying the lowest shell
Electron is ejected
An upper-shell electron drops down to fill the vacancy
X-ray characteristic to this elements’ energy is emitted
Nucleus
Ejected e-
Transitioned e-
Incident
X-Ray
Emitted
X-Ray

13. XRF Field Photos

14. ¾”

15. Treated vs. Untreated Wood

16. Dry vs. Wet Treated Wood

17. Dry vs. Wet Untreated Wood

18. Alternative Chemicals

19. Distance readings

20. New XRF Unit
Portable hand-held XRF units

21. Preliminary Testing at Wood Recycling Facility

22. Preliminary Testing

23. Demonstration with Innov-X Unit at End of Meeting