title: Fungal biodegradation of CCA-treated wood and removal of its metal components.
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(2)O(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(2)O(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.
authors.affiliation: Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, 5-1 Anam-Dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea.
authors.forename: Yong-Seok
authors.initials: YS
authors.lastname: Choi
authors.forename: Jae-Jin
authors.initials: JJ
authors.lastname: Kim
authors.forename: Min-Ji
authors.initials: MJ
authors.lastname: Kim
authors.forename: Yuji
authors.initials: Y
authors.lastname: Imamura
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Yoshimura
authors.forename: Gyu-Hyeok
authors.initials: GH
authors.lastname: Kim
mesh_terms: D001149:Arsenates / Q000737:chemistry*; D001487:Basidiomycota / Q000378:metabolism*; D001673:Biodegradation, Environmental; D008670:Metals / Q000302:isolation & purification* / Q000378:metabolism*; D009038:Motion; D019815:Oxalic Acid / Q000378:metabolism; D014934:Wood / Q000737:chemistry / Q000378:metabolism / Q000382:microbiology*
chemical_list: D001149:Arsenates; D008670:Metals; D019815:Oxalic Acid