THE INFLUENCE OF ACCELERATED FIXATION ON THE STABILITY OF CHROMIUM(V)IN CCA-TREATED WOOD

Authors
RUDDICK JNR YAMAMOTO K HERRING FG
Citation
Jnr. Ruddick et al., THE INFLUENCE OF ACCELERATED FIXATION ON THE STABILITY OF CHROMIUM(V)IN CCA-TREATED WOOD, Holzforschung, 48(1), 1994, pp. 1-3
Citations number
12
Categorie Soggetti
Forestry,"Materials Science, Paper & Wood
Journal title
Holzforschung → ACNP
ISSN journal
00183830
Volume
48
Issue
1
Year of publication
1994
Pages
1 - 3
Database
ISI
SICI code
0018-3830(1994)48:1<1:TIOAFO>2.0.ZU;2-F
Abstract
Ponderosa pine match stick specimens were impregnated with chromated-c opperarsenate preservative (CCA) and the treated wood subjected to, st oring under ambient conditions, oven drying or steam treatment. The sa mples were analyzed by electron spin resonance spectrometry (ESR). Acc elerated fixation of CCA by steam treatment initially produced a stron g chromium(V) ESR signal, which quickly decreased. Complete reduction of Cr(VI) to Cr(III) was achieved in 2 hours by steaming. Samples stor ed under ambient conditions still exhibited a moderately strong chromi um(V) signal after 44 days. Oven drying of the CCA-treated samples for four days, failed to convert all of the chromium(V) intermediate to t he trivalent form. Leaching of CCA-treated samples, confirmed that fix ation was best achieved with the steam treatment. Oven drying caused t he samples to leach large amounts of copper and smaller amounts of chr omium and arsenic.