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Weining Cui, Lisveth Flores del Pino, Thomas C. Voice, Karen Chou, D. Pascal Kamdem

Speciation of arsenic and chromium in the leachate from chromated copper arsenate (CCA) type C treated southern pine (Pinus spp.)

Keywords: arsenic, chromated copper arsenate (CCA), chromatography, chromium, Leaching, Speciation, wood

A 558-h laboratory leaching test (AWPA E-11) was carried out on both commercially and laboratory chromated copper arsenate (CCA) type C-treated southern pine. Arsenic, chromium, and copper concentrations in the leachate collected were examined. Leaching of chromium and copper from CCA-treated wood cubes were nearly undetectable using flame atomic absorption spectroscopy after 174 and 366 h, respectively. Less than 10% of the total chromium in the leachate was present as hexavalent chromium [Cr(VI)] after leaching for 30 h. Selective ion-exchange chromatography was used to speciate arsenic in the leachate. In the first 270 h, approximately 70–90% of the total arsenic in the leachate was inorganic pentavalent arsenic [As(V)] and 10–30% was inorganic trivalent arsenic [As(III)].

Holzforschung, Walter de Gruyter

Print ISSN: 0018-3830
Volume: 59, 02/2005
Pages: 199 - 204

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