Abstract
This study investigated the use of monoethanolamine (Mea) solution to extract copper from alkaline copper quat (ACQ)-treated wood. Mea could extract more than 90 % of copper from ACQ-treated wood. The formation of stable neutral Cu(Mea)2 in Mea solution is the main mechanism for Mea extraction. The effects of process parameters: pH, Mea concentration and temperature were also studied. Higher Mea solution pH resulted in higher Cu extraction efficiencies until pH 10. Cu extraction efficiency increased moderately to 10 % Mea concentration but not significantly above this. Mea (10–15 %) extraction at the original pH (around 12) was fast, and the effect of extraction temperature was insignificant for small particles of treated wood and detrimental for larger pieces. Based on empirical data and application of theoretical diffusion models with larger specimens, extraction was faster in the longitudinal direction than for the other wood directions. Since the extract solution containing ACQ components can potentially be reused as fresh treating solution after the proper supplement of Cu–amine solution, this approach is the most straightforward procedure for the recycling of chemicals removed from ACQ-treated wood.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
