Impact of Arsenic from CCA-Treated Wood in Marine and Terrestrial Environments A Collaborative Research between FIU and UM Supported by NIEHS-ARCH Program.

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Presentation transcript:

Impact of Arsenic from CCA-Treated Wood in Marine and Terrestrial Environments A Collaborative Research between FIU and UM Supported by NIEHS-ARCH Program

Acknowledgments FIU FIU  Myron Georgiadis  Sheena Powell Szuri UM UM  Dr. Helena Solo-Gabriele  Bernine Khan

Goals To develop analytical techniques for arsenic speciation in leachate of CCA-treated wood and surrounding soils.To develop analytical techniques for arsenic speciation in leachate of CCA-treated wood and surrounding soils. To develop an analytical procedure for arsenic speciation based on the partitioning of arsenic compounds between different molecular-weight fractions in leachateTo develop an analytical procedure for arsenic speciation based on the partitioning of arsenic compounds between different molecular-weight fractions in leachate

Effects of PO 4 Concentration (PACS-2)

HG-AFS and ICP-MS Comparison

Effects of Extraction Time (PACS-2)

Effects of Extraction Time (PACS-2 spiked with arsenite)

Effects of EDTA (PACS-2 spiked with arsenite)

Varying EDTA Concentration (PACS-2 spiked with arsenate)

Everglades Soil Sample Spiked with Arsenite (2  g/g)

Everglades Soil Sample Spiked with Arsenate (4  g/g)

MWCO Equilibrium Dialysis Average Recovery by Molecular Weight Cutoff

Total Arsenic from two Leachates using two Molecular Weight Cutoff Sizes after 24 hour Dialysis. Leachate 1 Leachate 2