Journal of Material Cycles and Waste Management

, Volume 20, Issue 2, pp 1299–1309 | Cite as

Removal of toxic elements from wastewater generated in the decontamination of CCA-treated Eucalyptus sp. and Pinus canadense wood

  • Heldiane S. dos SantosEmail author
  • Suzana F. Ferrarini
  • Francine Q. Flores
  • Marçal J. R. Pires
  • Carla M. N. Azevedo
  • Lucie Coudert
  • Jean-François Blais


The objective of this study was to apply extraction with hot sulfuric acid to remove Cu, Cr, and As from different species of wood treated with CCA and subsequently evaluate treatment processes for the effluents generated in acid decontamination. This study was conducted in two stages: the first involved applying acid extraction to decontaminate different species of Eucalyptus sp. and Pinus resinosa treated with CCA and the second stage consisted of optimizing the treatment of acidic effluents generated in this process based on precipitation and coagulation. When compared to the initial levels, As, Cu, and Cr removal in the three extraction cycles was over 79%. Classification tests were performed to determine decontamination of the solid wastes generated in the extraction process and the results were lower than the limit established for hazardous waste, according to local legislation. The decontaminated wood obtained in this process can be considered for disposal in landfills or potential reuse. Precipitation was performed using FeCl3 as coagulant and NaOH or Ca(OH)2 as alkalizing agents. The results indicated that the use of FeCl3 and Ca(OH)2 ensures compliance with environmental legislation for both effluents tested, allowing As, Cu, and Cr removal above 98.5%. These findings demonstrate that precipitation can be used to successfully remove toxic elements from wastewater generated by decontamination of CCA-treated wood, opening the possibility of applying this process on an industrial scale.


CCA Precipitation Leachate Treated wood Toxic elements 



The authors are grateful to Conselho Nacional de Pesquisa—CNPq (Proc. Nos. 309623/2012-0 and 312323/2015-8) and Fundação de Amparo à Pesquisa do Estado do RS—FAPERGS (Proc. No. 11/1403-8) for their financial support. H. Santos thanks Comissão de Aperfeiçoamento de Pessoal do Nível Superior—CAPES (Proc. PDSE No. 9108/11-4) and Institut National de la Recherche Scientifique (Centre Eau, Terre et Environnement)—INRS for the sandwich doctoral fellowship.

Supplementary material

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Supplementary material 1 (DOCX 187 KB)


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Copyright information

© Springer Japan KK, part of Springer Nature 2017

Authors and Affiliations

  • Heldiane S. dos Santos
    • 1
    Email author
  • Suzana F. Ferrarini
    • 1
  • Francine Q. Flores
    • 1
  • Marçal J. R. Pires
    • 1
  • Carla M. N. Azevedo
    • 1
  • Lucie Coudert
    • 2
  • Jean-François Blais
    • 2
  1. 1.Programa de Pós-Graduação em Engenharia e Tecnologia de MateriaisPontifícia Universidade Católica do Rio Grande do SulPorto AlegreBrazil
  2. 2.Institut National de la Recherche Scientifique (Centre Eau, Terre et Environnement)Université du QuébecQuébecCanada

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