Ecotoxicity of heat-treated Kapur and Japanese larch

Sabiha Salim, Zaidon Ashaari, Yong Seok Choi, Ki Jong Cho, Jinho Jung, Gyu Hyeok Kim

Research output: Contribution to journalArticlepeer-review


Kapur (Dryobalanops sp.) and Japanese larch (Larix kaempferi) wood samples were heat-treated in air at 180 °C for 24 and 48 h. Leaching and toxicity tests were conducted to determine the ecotoxicity effect of these heat-treated woods on the aquatic environment due to heat treatment. The toxicity of conventional preservative-treated woods, i.e. chromated copper arsenate (CCA) and ammoniacal copper quat (ACQ), was also determined for comparison purposes. Acute toxicity tests were performed using two aquatic organisms, Daphnia magna and Vibrio fischeri according to the Organization for Economic Co-operation and Development standard procedures and Microtox assay, respectively. Significantly low toxicity to D. magna was found for the heat-treated Kapur compared to that of untreated Kapur, while heat-treated Japanese larch did not show any toxicity effect. As expected, ACQ-treated samples showed the highest toxicity to D. magna, followed by that of CCA, though toxicity of both preservative-treated woods further reduced over time. Hence, heat treatment of Kapur and Japanese larch were believed to be not harmful to the aquatic ecosystem.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalEuropean Journal of Wood and Wood Products
Publication statusAccepted/In press - 2016 Jan 28

ASJC Scopus subject areas

  • Forestry
  • General Materials Science


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