Keywords: Arsenic, Chromium, Speciation, Leachates from CCA-Treated Wood, Chromated Copper Arsenate, HPLC-HG-AFS, HPLC-ICP-MS, ICP-AES, ion chromatography, lysimeter experiments, As(V), As(III), Cr(III), Cr(VI)

(FINAL)
Submitted September 27, 2004
Helena Solo-Gabriele, Ph.D., P.E.
Bernine Khan, Ph.D.
University of Miami, Coral Gables, FL
Timothy Townsend, Ph.D., P.E.
Jin-Kun Song, M.S.
Jenna Jambeck, Ph.D.
Brajesh Dubey, M.S.
Yong-Chul Jang, Ph.D.
University of Florida, Gainesville, FL
Yong Cai, Ph.D.
Florida International University
Miami, FL
State University System of Florida
FLORIDA CENTER
FOR SOLID AND HAZARDOUS WASTE MANAGEMENT
2207 NW 13 Street, Suite D
Gainesville, FL 32609
Report #03-07

Different species of arsenic and chromium are characterized by different toxicities and
different mobilities. The environmental impacts of CCA-treated wood would therefore be a function of the chemical forms of the metal releases. As a consequence a series of tasks were undertaken to evaluate arsenic and chromium species from CCA-treated wood. The intent of these tasks was to quantify the total quantity metals released under different environmental conditions and to obtain some insight concerning the speciation of these releases. Samples evaluated in this study were speciated for arsenic as As(V), As(III), DMAA, and MMAA. Chromium speciation focused on evaluating the relative distribution of total chromium between Cr(III) and Cr(VI). Analyses were conducted on solid wood samples and on leachates from these wood samples using a series of different analytical techniques including HPLC-HG-AFS,
HPLC-ICP-MS, ICP-AES, and ion chromatography. Tasks described in this study include: a) a “pH stat” experiment, b) SPLP and TCLP experiments, c) a set of lysimeter experiments, and d) analysis of groundwater in the vicinity of C&D debris disposal facilities.