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Article: Leaching of CCA from lumber exposed to natural rain aboveground.
- Article from:
- Forest Products Journal
- Article date:
- September 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 Forest Products Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract
This paper presents results of a 1-year study that continuously monitored chromated copper arsenate (CCA) leaching from aboveground, naturally exposed 38-mm by 137.4-mm (2-in. by 6-in.) dimensional lumber samples. Three wood species, southern yellow pine (Pinus spp.), jack pine (Pinus banksiana Lamb.), and black spruce (Picea mariana (Mill.) B.S.P.) treated with two preservative concentrations, with and without commercial water-repellent and post-fixation washing treatments, were evaluated for their effects on leaching rates. Component leaching ranged from 7.3 to 20.5 [micro]g/[cm.sup.2] for chromium (Cr), 25.8 to 138 [micro]g/[cm.sup.2] for arsenic ...