Skip to Main Content
Migration of iron and manganese into CCA-treated wood in soil contact and the resulting error in leaching results when using energy dispersive x-ray fluorescence spectrometersAuthor(s): Tor P. Schultz; Darrel D. Nicholas; Stan Lebow
Source: Forest products journal. Vol. 53, no. 9 (Sept. 2003): Pages 77-80.
Publication Series: Miscellaneous Publication
PDF: View PDF (92 KB)
DescriptionIn a laboratory leaching study, we found that chromated copper arsenate (CCA) treated wood, which had been exposed to one of five soils examined, unexpectedly appeared to gain significant Cr (47%) when measured with an energy-dispersive x-ray fluorescence instrument (American Wood-Preservers' Association (AWPA) Method A9-01 2001). Analysis of some of the leached samples exposed to all five soils by inductively coupled plasma (ICP) spectrometry showed that Fe migrated into the CCA-treated samples from four of the five soils and Mn migrated into wood exposed to two of the five soils. The presence of Fe and Mn interfered with measurement of Cr retention using two different bench-top energy dispersive x-ray fluorescence spectrometers. It has been previously shown that Mn and/or Fe can migrate from soil into wood, and we conclude that this may result in a significant error in determining the amount of metals that leach from CCA- treated wood. Thus, AWPA Method A9-01 may need to be modified to indicate this potential error, and leaching data from prior studies that used energy dispersive instruments may need to be reexamined.
CitationSchultz, Tor P.; Nicholas, Darrel D.; Lebow, Stan. 2003. Migration of iron and manganese into CCA-treated wood in soil contact and the resulting error in leaching results when using energy dispersive x-ray fluorescence spectrometers. Forest products journal. Vol. 53, no. 9 (Sept. 2003): Pages 77-80.
KeywordsCCA, iron, manganese, leaching, x-ray fluorescence spectrometers
- Laboratory studies of CCA-C leaching : influence of wood and soil properties on extent of arsenic and copper depletion.
- Statistical analysis of influence of soil source on leaching of arsenic and copper from CCA-C treated wood
- Effect of prestain on the release rate of copper, chromium, and arsenic from western hemlock
XML: View XML