Fungal biodegradation of CCA-treated wood and removal of its metal components

Yong Seok Choi, Jae Jin Kim, Min Ji Kim, Yuji Imamura, Tsuyoshi Yoshimura, Gyu Hyeok Kim

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9 Citations (Scopus)

Abstract

In the present study, 5 isolates of brown-rot fungi were used for fungal bioprocessing (FB) of chromated copper arsenate (CCA)-treated wood wastes: Antrodia vaillantii SEL8501, Fomitopsis palustris TYP0507 and TYP6137, and Crustoderma sp. KUC8065 and KUC8611. The isolates showed notable capacity for the degradation of treated wood and removal of CCA components via the American Wood Protection Association soil block test. Among them, Crustoderma sp. KUC8611 effectively decayed the treated wood, causing a mass loss of up to 60%. F. palustris caused extensive leaching of CrO 3 of up to 79% and As 2O 5 of up to 87%, but only moderate leaching of CuO of up to 50%. This high capacity for removal of CrO 3 and As 2O 5 showed a strong logarithmic relationship with the amount of oxalic acid produced in the decayed wood. The majority of metals removed from treated wood during the decay process were deposited in the soil and feeder strip. Further investigation will be required to establish the capability of selected fungi for FB of full-sized lumber treated with CCA.

Original languageEnglish
Pages (from-to)725-729
Number of pages5
JournalChemosphere
Volume88
Issue number6
DOIs
Publication statusPublished - 2012 Jul 1

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Keywords

  • Biodegradation
  • Brown-rot fungi
  • CCA-treated wood wastes
  • Fungal bioprocessing
  • Metal removal

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemistry(all)
  • Pollution
  • Health, Toxicology and Mutagenesis

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