Abstract
The purpose of this study was to evaluate the bioremediation of CCA-treated wood wastes by brown rot fungi, as well as to improve the metal removal from treated wood by altering an existing bioremediation process. In Process I, CCA-treated wood sawdust was added and bioremediated after accumulating oxalic acid in a fermentation broth. In Process II, simplification of the bioremediation process and improvement of metal removal efficiency were attempted. Thus, the treated sawdust and fungal inocula were simultaneously placed in a fermentation broth. In addition, the efficiency of the fermentation broth containing oxalic acid was compared with that of commercial oxalic acid. The results obtained using Process I showed that the greatest reduction in arsenic and chromium (98% and 91%, respectively) was achieved by an unknown Polyporales species. On the other hand, the most efficient removal of copper (82%) was achieved by Daedalea dickinsii, which had the lowest oxalic acid production. Using Process II, the highest copper, chromium and arsenic removal rates (96%, 92% and 98%, respectively) were obtained by Fomitopsis palustris. Process II could be a very valuable method for metal removal from CCA-treated wood when F. palustris is used. Our results also suggest that oxalic acid produced from fungus can be used as an alternative to commercial oxalic acid.
Original language | English |
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Pages (from-to) | 673-679 |
Number of pages | 7 |
Journal | Environmental Technology |
Volume | 30 |
Issue number | 7 |
DOIs | |
Publication status | Published - 2009 Jun |
Bibliographical note
Funding Information:This work was supported by the Korea Research Foundation Grant funded by the Korean Government (KRF-2008-313-F00056) and the KTOL grant funded by The National Institute of Biological Resources, Korean Government.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords
- Bioremediation
- Brown rot fungi
- CCA-treated wood
- Fomitopsis palustris
- Oxalic acid
- Polyporales
ASJC Scopus subject areas
- Environmental Chemistry
- Water Science and Technology
- Waste Management and Disposal