Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지

Fixation and Leaching Characteristics of CCA- and CCFZ- Treated Domestic Softwood Species

  • Kim, Jae-Jin (Department of Wood Science, University of British Columbia) ;
  • Kim, Hyung-Jun (Wood Preservation R & D Center, Joong Dong Co. Ltd.) ;
  • Ra, Jong-Bum (Department of Forest Products Engineering, Jinju National University) ;
  • Chun, Su Kyoung (Department of Wood Science and Engineering, Kangwon National University) ;
  • Kim, Gyu-Hyeok (Division of Environmental Science and Ecological Engineering, Korea University)
  • Received : 2003.05.13
  • Accepted : 2003.06.20
  • Published : 2003.12.26
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Abstract

The fixation and leaching characteristics of chromated copper arsenate (CCA Type C) and chromium- copper-fluoride-zinc (CCFZ) in domestic softwood (Japanese red pine, Korean pine, and Japanese larch) sapwood were investigated using the expressate method to follow chromium fixation and the American Wood-Preservers' Association (AWPA) leaching procedure to determine leaching properties after fixation. The rates of fixation were affected by preservative types; CCA was fixed much faster than CCFZ for all species evaluated. There were definite differences in the fixation rates of different species, with Korean pine requiring shorter to fix than the other species evaluated. Chromium fixation was greatly enhanced by elevated temperatures, and fixation time can be estimated according to fixation temperatures applied. The percentage of arsenic and zinc leached from domestic softwoods was relatively high compared to chromium and copper, indicating that there is still a relatively high unfixed arsenic and zinc components after complete chromium fixation in CCA-and CCFZ-treated samples, respectively.

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Acknowledgement

This research was supported by Agricultural R&D Promotion Center