Optimization of a chemical leaching process for decontamination of CCA-treated wood
Abstract
Increasing volumes of discarded Chromated Copper Arsenate (CCA)-treated wood require the development of new treatment and recycling options to avoid the accumulation of wood wastes in landfill sites, resulting in dispersion of contaminants in the environment. The aim of this study is to design an economic chemical leaching process for the extraction of arsenic, chromium and copper from CCA-treated wood. Choice of chemical reagent, reagent concentration, solid-to-liquid ratio, temperature, reaction time and wood particle size are parameters which have been optimized. Sulphuric acid was found to be the cheapest and most effective reagent. Optimum operation conditions are 75 degrees C with 0.2N H(2)SO(4) and 150 g wood L(-1). Under these conditions, three leaching steps lasting 2h each allowed for 99% extraction of arsenic and copper, and 91% extraction of chromium. Furthermore, arsenic concentration in TCLP leachate is reduced by 86% so the environmental hazard is reduced. Decontamination process cost is estimated to 115US$ per ton of treated wood. These results demonstrate the feasibility of chemical remediation and that sulphuric acid leaching is a promising option for CCA-treated wood waste management.
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Chemical analysis for decontamination of CCA-treated wood and life cycle analysis to reduce environmental impacts have become focal points for researchers.
“Since then, chemical analysis for decontamination of CCA-treated wood [39] and life cycle analysis to reduce environmental impacts have become focal points for researchers [40][41][42][43].”
From Circular Economy of Construction and Demolition Wood Waste—A Theoretical Framework Approach (2022) · cites this paper as [39]
Even renovation and demolition projects produce a considerable EWW of varying qualities and categories, making it even harder to sort and separate.
“Even renovation and demolition projects produce a considerable EWW of varying qualities and categories, making it even harder to sort and separate [39].”
From Circular Economy of Construction and Demolition Wood Waste—A Theoretical Framework Approach (2022) · cites this paper as [39]
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- Authors
- Janin, A., Blais, J.-F., Mercier, G., & Drogui, P.
- Affiliations
- Institut National de la Recherche Scientifique (CA)
- Corresponding author
- Blais, Jean-François
- Venue
- Journal of Hazardous Materials
- Publisher
- Elsevier BV
- Published
- 2009-09
- Volume
- 169
- Issue
- 1-3
- Pages
- 136-145
- ISSN
- 0304-3894 (ISSN-L)
- OpenAlex
- W2001829909
- Cited by
- 60
- References
- 30
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 3 · 2020: 5 · 2019: 5 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 2 · 2013: 11 · 2012: 7
- FWCI
- 10.15
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Hazardous Materials (publishedVersion)
- PubMed (publishedVersion)
- EspaceINRS (National Institute for Scientific Research (Canada)) (submittedVersion)
- Funders
- Ministry of Environment
- Natural Sciences and Engineering Research Council of Canada
- Topics
- Physical Sciences › Environmental Science › Waste Management and Disposal › Recycling and Waste Management Techniques
- Physical Sciences › Environmental Science › Environmental Chemistry › Arsenic contamination and mitigation
- Physical Sciences › Environmental Science › Water Science and Technology › Environmental and Analytical Chemistry Studies
- Keywords
- CCA-treated wood, chemical leaching, arsenic removal, chromium removal, copper removal, sulfuric acid leaching, wood waste recycling, process optimization, heavy metal extraction
- MeSH terms
- Absorption, Arsenates, Chromates, Copper, Decontamination, Feasibility Studies, Industrial Waste, Water Pollutants, Chemical, Wood, Environmental Restoration and Remediation, Chemical Phenomena
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