• Journal of the Korean Wood Science and Technology
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• v.32 no.2
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• pp.1-8
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• 2004

Heavy metals were removed from CCA- and CCFZ- treated wood using a brown-rot fungi Tyromyces palustris. The amount of effective elements extracted from treated woods was compared for different treatment methods. The relationship between the amount of heavy metals removed and concentrations of oxalic acid for treated wood was examined. Also, the relationship between mycelia weight and removal rate was examined. The removed quantity of heavy metal from treated wood according to fermentation methods was examined. The extraction amount of chromium and arsenic components increased with increasing oxalic acid concentration, but the extraction amount of copper did not improved much. A 287 mg of mycelia weight can remove chromium and arsenic over 60% in 3 g CCA chips and copper was also removed over 50%. The chromium, copper and arsenic were removed over 60% by shaking fermentation, the removal rate of copper by static cultivation was higher than that of shaking fermentation. The removal rate of chromium, copper and arsenic were 72%, 61% and 59% with air-lift bioreactor, respectively.