【Paper】
Behavior of Wood Preservatives in Waste Wood Recycling:
Particle Board Manufacturing
Misuzu Asari*, Hiroshi Takatsuki* and Shin-ichi Sakai**
* Environment Preservation Center, Kyoto University
** National Institute for Environmental Studies
† Correspondence should be addressed to Misuzu Asari:
Environment Preservation Center, Kyoto University
（Yoshidahonmachi, Sakyo-ku, Kyoto, 606-8501 Japan）

Abstract
Although various routes for waste wood recycling have been examined from the viewpoint of reductions in waste disposal and effective use of resources, behavior of wood preservatives which may flow into waste wood materials, and related compounds, in the recycling processes have not been fully elucidated upon. The behavior of heavy metals, chlorinated hydrocarbons and polycyclic aromatic hydrocarbons（PAHs）were surveyed in the manufacturing process of construction material（particle board）using waste wood chips. It was found that waste wood treated with pentachlorophenol（PCP）or creosote might flow into the crude chips. Also, there was formation of PCDD/DFs which were contained as impurities of PCP during the manufacturing process. Consequently, chemical substances originating in those behaviors were contained in the final products. In order to promote the environmentally sound management of waste wood, verification of the chemical levels in final products, through examination of a risk control policy, will be required.

Key words: waste wood recycling, wood preservatives, pentachlorophenol（PCP）, polychlorinated dibenzo-p-dioxins and dibenzofurans（PCDD/DFs）, polycyclic aromatic hydrocarbons（PAHs）