Abstract
Spent chromated copper arsenate (CCA)-treated wood was liquefied in polyethylene glycol 400/glycerin (2:1 w/w). Sulfuric acid (95-98%) and ferrous salts (FeSO
4•7H
2O or FeCl
2•4H
2O) were used as catalysts and additives, respectively. The resulting liquefied CCA-treated wood was diluted with aqueous solvents and was then mixed with complexion/precipitation agents, followed by precipitation or filtration to remove the toxic metal-bearing sediment. As a result, more than 90% of Cu, Cr or As was removed.
Keywords
Chromated copper arsenate,
detoxification,
inductively coupled plasma,
recycling,
treated wood,
wood liquefaction
Citation
Lin, Lianzhen; Hse, Chung-Yun. 2005. Liquefaction of CCA-treated wood and elimination of metals from the solvent by precipitation. Holzforschung, Vol. 59, pp. 285-288