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-SCX anion-exchange cartridge LC-SAX 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 n 8, 2”x4”x16 ft have been purchased n Analyzed to confirm treatment & retention n Samples then subjected to leaching tests n For this portion of the project samples also subjected to toxicity tests
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 Sorting Lab Ash Char & Trt Sorting Field Alt. Chem. Lit Review Alt. Chem. Leaching Alt. Chem. Toxicity Minnesota Lit Review Alt Chem & As Spec Deck Study As Spec Simulated As Spec LF Year 4 Year 5 Year 1 Year 2 Year 3 Year 3,Suppl
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