year 5 research cca-treated wood: evaluating toxicity during disposal (recently funded)
TRANSCRIPT
Year 5 Research
CCA-Treated Wood:Evaluating Toxicity During Disposal
(Recently Funded)
Objectives
Evaluate arsenic concentrations (total and individual species) in leachates from CCA-treated wood
Evaluate toxicity of alternative-chemical treated wood
Methods, Phase I Arsenic Speciation of Leachates from CCA-
Treated Wood
Method Development, Cartridges for Samples Preservation
Lysimeter Installation & Leachate Analysis
TCLP and SPLP Tests & Leachate Analysis
Cartridge System
LC-S
CX
anion-exchange cartridge LC
-SA
X
DMA
0.45 m filter
cation-exchange cartridge
As(V), Elute with HCL
MMA, Elute with HAc
As(III)
Sample Analysis
HPLC-HG-AFS: As(III), As(V), DMA, MMA
HPLC-ICP/MS: All Arsenic Species
Methods, Phase II
Toxicity of the Alternatives
ACQ, CBA, CC, CDDC, CCA, untreated
5 Toxicity Tests, Microtox, Metplate, Invertebrate Test, Algal Assay, Hormonally Active Agents
Sample Processing
8, 2”x4”x16 ft have been purchased
Analyzed to confirm treatment & retention
Samples then subjectedto leaching tests
For this portion of the projectsamples also subjected totoxicity tests
AC
Q
AC
Q
AC
QC
BA
CBA
CBA
CC
A,1
CC
CC
CC
CD
DC
CD
DC
CD
DC
CC
A,1
CC
A,1 C
CA,
2
CC
A,2
CC
A,2
U
U
U
X
X
X
16ft
1 2 3 .....8
2 ft
Anticipated Benefits
Data Used to Determine the Impact of Current Disposal Pathways (Toxicity Focus)
Results Can Be Used With FDEP Risk Models
1:1 Comparison of Alternative-Chemical Treated Wood Products Toxicity of Alternatives Versus That of CCA
Ash Problem
Inventory
SortingLab
Ash Char & Trt
SortingField
Alt. Chem.Lit Review
Alt. Chem.Leaching
Alt. Chem.Toxicity
Minnesota
Lit ReviewAlt Chem & As Spec
DeckStudy
As SpecSimulated
As SpecGW @ LF
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