history of research project on cca-treated wood presented august 18, 2005 tag meeting
TRANSCRIPT
History of Research Project on CCA-Treated Wood
Presented August 18, 2005TAG Meeting
Funding Received from
Florida Center for Solid and Hazardous Waste Mngt.
Florida Power and LightSarasota County & Town of Medley/
Florida Department of Environmental Protection
Florida International University/NIEHSRutgers University/NIEHS
U.Miami/NIEHSUniversity of Florida FCES Center/NSF
Public Health Trust, CA
Helena Solo-Gabriele, Ph.D., P.E., Timothy Townsend, Ph.D.
Professor, Civil/Environ. Engrg Assoc. Prof., Environ/Solid Waste Engrg
Core Team of Faculty Researchers
Gabriel Bitton, Ph.D. David Hahn, Ph.D.
Professor, Env. Micro/Tox Assoc. Prof., Mechanical – Laser
Yong Cai, Ph.D. Stuart Shalat, Sc.D.
Assoc. Prof., Chemistry Assoc. Prof., Epidemiology/Pesticides
Lora Fleming, M.D., Ph.D. C.Y. Wu, Ph.D.
Professor., Epidemiology/MPH Assist. Prof., Env. Engineering/Air
Additional Faculty Researchers
Helena Solo-Gabriele, Ph.D., P.E., C.Y. Wu, Ph.D.
Assoc. Prof., Civil/Environ. Engrg Assoc. Prof., Environ/Air Pollution Control Engineering
Tim Townsend, Ph.D., P.E. Tim Townsend, Ph.D., P.E.
Assoc. Prof., Environ/Solid Waste Engrg Assoc. Prof., Environ/Solid Waste Engrg
Today’s Meeting
Joint Meeting
Approx. 32 Students Supported on CCA Projects Since Beginning
of Project
Today’s Student Presenters
Colleen Block, B.S. candidate from U.MiamiBrajesh Dubey, Ph.D. candidate from U.FloridaGary Jacobi, M.S. candidate from U.MiamiAnadi Misra, M.S. candidate from U.FloridaAmy Omae, M.S. candidate from U.MiamiTomoyuki “Shiba” Shibata, Ph.D. candidate from U.Miami
Guest Speakers
Claire Cornillier, CTBA, Technical Centre for Wood and Furniture, Bordeaux, France
Harvey Schneider, President, Florida Wood Recycling
Medley, FL
John Schert, Executive Director, Florida Center for Solid and Hazardous Waste Mgt. and Florida Center for Environmental Solutions, Gainesville, FL
History of Research Activities
Original Motivation For Project
Ash Disposal Problem, 1995
FCSHWM Year 1 (1996-1997)
Year 1: C&D Wood Testing
Processed Wood at C&D Recycling Facilities
6% CCA by Weight
Year 1: Disposal Forecast
0
500
1000
1500
20001
96
0
19
80
20
00
20
20
20
40
20
60
20
80
21
00
21
20
21
40
21
60
21
80
22
00
22
20
22
40
22
60
22
80
Year
Ma
ss
Le
ac
he
d (
me
tric
to
ns
)
Leaching During Disposal
Disposed in Wood
Leached During In-Service Use
Production (Updated 2005)
As
0
500
1000
1500
2000
19
60
19
80
20
00
20
20
20
40
20
60
20
80
21
00
21
20
21
40
21
60
21
80
22
00
22
20
22
40
22
60
22
80
Year
Ma
ss
Le
ac
he
d (
me
tric
to
ns
)
Leaching During Disposal
Disposed in Wood
Leached During In-Service Use
Production
0
10
20
30
40
50
1960
2000
2100
2200
2300
2400
2500
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
Year
Mas
s L
each
ed (
met
ric
ton
s)
C&D
Monofill
MSW Slower Rate of Release but More Concentrated
As
FCSHWM Year 2 (1997-1998)
Year 2: Ash Leaching Studies
Leaching Studies, ash Hazardous when CCA-treated
wood represents 5% of wood burned
Solvents can extract metals from ash, citric acid very promising (40 to 100% As removed)
Year 2: Sorting
Sorting Studies, Laboratory Chemical stains, low capital cost
labor intensive
X-ray methods, high capital costsuitable for on-line system
Untreated Treated
Outline of Work Since 1999 In-Service Issues
Impacts on Soil Runoff and Infiltration* (NIEHS funding) Playgrounds and Children* (NIEHS funding)
Disposal Leaching New and Weathered Wood Chemical Alternatives to CCA Sorting Methods* (FDEP/Medley) Mulch Studies* (FCSHWM)
In-Service: Soil Impacts
In Service: Soil Impacts
0
2
4
6
8
10
12
0 10 20 30 40 50 60 70 80
Arsenic Concentration (mg/kg)
Experimental Set-up
sandy soil, 2 ft
deck
gravel
rainwater runoff collection vessel
Infiltrating rainwater
precipitation
Disposal
Leaching New and Weathered Wood Chemical Alternatives to CCA Sorting Methods* Mulch Studies*
Leaching of CCA-Treated Wood
0
5
10
15
20
25
30
35
40
TCLP SPLP EPTOX WET
As
Co
nce
ntr
atio
n (
mg
/L)
Sawdust
Chipped Wood
5 20-g Blocks
100-g Block
0
2
4
6
8
10
12
14
16
18
20
A B C D E F G H I J K L M N O P Q
As
(m
g/l
)
New Wood Used Wood
TCLPLimit
Leaching of CCA-Treated Wood
TCLP
Field-Scale Leaching2 Monofills / 2 C&D / 2 MSW
Untreated(As mg/L)
Treated(As mg/L)
Wood Monofill (100% wood)
< 0.02 5 – 43
C&D Waste(34% wood)
<0.06 0.4 – 1.8
MSW(2% wood)
< 0.7 0.4 – 2.3
Chemical Alternatives: Leaching
0
10
20
30
40
50
60
70
CCA-1 CCA-2 ACQ CBA CC CDDC
Co
pp
er
Co
nce
ntr
ati
on
(m
g/L
)
SPLPSynthetic Rainfall
Chemical Alternatives: Aquatic Toxicity
LessToxic
0.1
1
10
100
1 10 100 1000Copper Concentration (mg/L)
EC
50 (
%)
EC50 Cu = 3.8 mg/l
EC50 Cu = 0.076 mg/l
MicrotoxRegression Line
R2 = 0.307CCA
CDDC
CBA
ACQ
CC
Laser
x-ray
Untreated Treated Test Kits
x-ray
x-ray
Sorting
Work Products
8 FCSHWM reports, Finalized (available on-line) 1 FCSHWM reports, Draft (available on-line) 2 FCSHWM reports, Pending
13 peer-reviewed journal articles published,
2 accepted, and 3 submitted Plus approx 40 conference proceedings and other
papers
Questions?
technical reports available at:
www.ccaresearch.org under the “publications” link