In:
hfsg, Walter de Gruyter GmbH, Vol. 67, No. 7 ( 2013-10-01), p. 815-823
Abstract:
Sapwood sawdust from southern pine was treated with micronized copper (MC) under various conditions and the mobilized copper(II) (Cu mob ) concentrations were determined in the treated wood by electron paramagnetic resonance (EPR) spectroscopy. The spectral parameters for the copper sulfate (CuSO 4 )-treated sapwood and those of the MC-treated sapwood were very similar. A linear correlation was found between the intensities of copper (Cu) EPR spectra and those of Cu energy-dispersive X-ray fluorescence spectroscopy in a series of CuSO 4 -treated sapwood reference samples. Thus, the EPR signal intensities could be reliably correlated to the mass of reacted Cu present using this calibration curve. The amount of the Cu mob in sawdust treated by MC suspensions increased during the first 2–3 days after the initial treatment and then reached a maximum during the 7-day monitoring period. In the case of the treatment with MC alone or MC azole, an increased MC concentration led to an elevated amount of Cu (to a maximum of ∼0.23% Cu) solubilized by the sapwood. If the wood was treated with MC quat, the Cu mob initially increased, but at higher concentrations the Cu mob content decreased, due to the interference by the quat cobiocide on the acid reaction between the wood and the basic Cu carbonate. An examination of commercially-treated wood confirmed the laboratory observations.
Type of Medium:
Online Resource
ISSN:
1437-434X
,
0018-3830
DOI:
10.1515/hf-2012-0136
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2013
detail.hit.zdb_id:
1466072-6
SSG:
23
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