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Title: Method to recover and reuse chromated copper arsenate wood preservative from spent treated wood

Abstract

The volume of chromated copper arsenate (CCA) treated wood products coming out of service is expected to increase dramatically during the next decade. There is a need for an alternative waste management approach to landfilling. This paper investigates the variables affecting extraction of CCA components from wood particles and the potential to oxidize and reuse the recovered chemicals. Most of the CCA components could be extracted by 10% H{sub 2}O{sub 2} at 50 deg. C in 6 h with an average extraction efficiency of 95% for Cr, 94% for Cu and 98% for As. The extract containing Cr{sup III}, Cu{sup II} and As{sup V} could be oxidized in several stages by aqueous 2.5% w/w H{sub 2}O{sub 2} in less than 2 h to a condition where it was compatible with CCA treating solutions and could be reused for treating new wood. When the recovered extract was mixed with fresh CCA solution in different ratios, the mixed CCA-C solutions had similar solution stability as freshly prepared CCA-C solution and treated wood had similar leaching properties as wood treated with fresh solution.

Authors:
 [1];  [2]
  1. Department of Chemical Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000 (Bangladesh)
  2. Earth Sciences Center, Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, Ont., M5S 1A1 (Canada)
Publication Date:
OSTI Identifier:
20877402
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 26; Journal Issue: 2; Other Information: DOI: 10.1016/j.wasman.2004.12.025; PII: S0956-053X(05)00033-4; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; COPPER; EXTRACTION; HYDROGEN PEROXIDE; LEACHING; PRESERVATIVES; WASTE MANAGEMENT; WOOD

Citation Formats

Kazi, Feroz Kabir M, and Cooper, Paul A. Method to recover and reuse chromated copper arsenate wood preservative from spent treated wood. United States: N. p., 2006. Web. doi:10.1016/j.wasman.2004.12.025.
Kazi, Feroz Kabir M, & Cooper, Paul A. Method to recover and reuse chromated copper arsenate wood preservative from spent treated wood. United States. https://doi.org/10.1016/j.wasman.2004.12.025
Kazi, Feroz Kabir M, and Cooper, Paul A. 2006. "Method to recover and reuse chromated copper arsenate wood preservative from spent treated wood". United States. https://doi.org/10.1016/j.wasman.2004.12.025.
@article{osti_20877402,
title = {Method to recover and reuse chromated copper arsenate wood preservative from spent treated wood},
author = {Kazi, Feroz Kabir M and Cooper, Paul A},
abstractNote = {The volume of chromated copper arsenate (CCA) treated wood products coming out of service is expected to increase dramatically during the next decade. There is a need for an alternative waste management approach to landfilling. This paper investigates the variables affecting extraction of CCA components from wood particles and the potential to oxidize and reuse the recovered chemicals. Most of the CCA components could be extracted by 10% H{sub 2}O{sub 2} at 50 deg. C in 6 h with an average extraction efficiency of 95% for Cr, 94% for Cu and 98% for As. The extract containing Cr{sup III}, Cu{sup II} and As{sup V} could be oxidized in several stages by aqueous 2.5% w/w H{sub 2}O{sub 2} in less than 2 h to a condition where it was compatible with CCA treating solutions and could be reused for treating new wood. When the recovered extract was mixed with fresh CCA solution in different ratios, the mixed CCA-C solutions had similar solution stability as freshly prepared CCA-C solution and treated wood had similar leaching properties as wood treated with fresh solution.},
doi = {10.1016/j.wasman.2004.12.025},
url = {https://www.osti.gov/biblio/20877402}, journal = {Waste Management},
issn = {0956-053X},
number = 2,
volume = 26,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2006},
month = {Sat Jul 01 00:00:00 EDT 2006}
}