Journal
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
Volume 65, Issue 2, Pages 369-373Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ibiod.2010.08.011
Keywords
Pyrolysis; Pyrolysis liquids; Tar oil; Biomass; Macadamia nut shell; Decay resistance; Termite resistance; Growth inhibition
Funding
- Istanbul University [UDP 6526]
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Decay and termite resistance of wood treated with tar oil obtained from a commercial pyrolysis process of macadamia nut shells was evaluated. Vacuum-treated pinewood specimens were subjected to two brown- and two white-rot fungi based on the soil-block test method specified by the American Wood Protection Association after a 10-day-leaching process. Treated specimens were also subjected to the subterranean termite attack according to Japanese Industrial Standards (JIS) for 3 weeks under laboratory conditions. In the study, growth inhibition of selected fungi with the tar oil was also tested in vitro. Treated wood specimens at a retention level of 460 kg m(-3) showed good protection against all the fungi tested. Mass losses in leached specimens were less than those observed in unleached specimens. Similar results were seen when the specimens were subjected to termite attack. Inhibition tests showed that higher concentrations of the tar oil are critical for inhibition of the brown-rot fungi compared to the concentrations required to impede the white-rot and sap-staining fungi tested. (C) 2011 Elsevier Ltd. All rights reserved.
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