You are here: Home :: Area NEM :: Agricultural science

Lianzhen Lin, Chung-Yun Hse

Liquefaction of CCA-treated wood and elimination of metals from the solvent by precipitation

Keywords: chromated copper arsenate, detoxification, inductively coupled plasma, recycling, treated wood, wood liquefaction

Spent chromated copper arsenate (CCA)-treated wood was liquefied in polyethylene glycol 400/glycerin (2:1w/w). Sulfuric acid (95–98%) and ferrous salts (FeSO₄·7H₂O or FeCl₂·4H₂O) 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.

Holzforschung, Walter de Gruyter

Print ISSN: 0018-3830
Volume: 59, 05/2005
Pages: 285 - 288

Show full article (external site)

Show all available items of this journal

 

Area NEM