Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592


You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Scaled-up remediation of CCA-treated wood

Source: Proceedings of the environmental impacts of preservative-treated wood, 2004 February 8-11, Orlando, FL. Gainesville, FL : Florida Center for Environmental Solutions, 2004: Pages 71-80

Author(s)Clausen, Carol A.; Kenealy, William R.

Publication Year: 2004  View PDF »

Category: Journal Articles

Abstract: Bioremediation is a novel approach to recycling waste wood treated with chromated copper arsenate (CCA). Remediating CCA-treated waste wood diverts this fiber source from our landfills and provides tangible secondary products from the cleaned fiber. On a laboratory scale, this method, which utilizes oxalic acid extraction and bioleaching with a metal- tolerant bacterium, removed up to 78% Cu, 100% Cr, and 97% As from 1 kg chipped CCA-treated southern pine. The two-step sequence of oxalic acid extraction and bioleaching removed more metals than did either acid extraction or bioleaching alone. Scale-up parameters on 11 kg of particulate, flaked, or chipped CCA- treated wood were evaluated in a 150-reactor. This process removed 79% Cu, 70% Cr, and 88% As from particulate wood, 83% Cu, 86% Cr, and 95% As from flaked wood, and 65% Cu, 64% Cr, and 81% As from wood chips. Metals released from CCA-treated wood during bioremediation are potentially recoverable from a liquid medium for reuse or disposal. Remediation methodologies remain cost prohibitive, but they may become economically competitive in the event landfill restrictions areimposed domestically.

Keywords: Remediation; CCA-treated wood; acid extraction; bioleaching; Bacillus licheniformis

File size: 381 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 22125
Current FPL Scientist associated with this product
Clausen, Carol A.
Supervisory Research Microbiologist

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »

Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »

Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »

Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »