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Synergetic effect of copper-plating wastewater as a catalyst for the destruction of acrylonitrile wastewater in supercritical water oxidation.
J Hazard Mater. 2009 Aug 15; 167(1-3):824-9.JH

Abstract

A new supercritical water oxidation process for the simultaneous treatment of mixed wastewater containing wastewater from acrylonitrile manufacturing processes and copper-plating processes was investigated using a continuous tubular reactor system. Experiments were carried out at temperatures ranging from 400 to 600 degrees C and a pressure of 25 MPa. The residence time was fixed at 2s by changing the flow rates of feeds, depending on reaction temperature. The initial total organic carbon (TOC) concentration of the wastewaters and the O(2) concentration at the reactor inlet were kept constant at 0.49 and 0.74 mol/L. It was confirmed that the copper-plating wastewater accelerated the TOC conversion of acrylonitrile wastewater from 17.6% to 67.3% at a temperature of 450 degrees C. Moreover, copper and copper oxide nanoparticles were generated in the process of supercritical water oxidation (SCWO) of mixed wastewater. 99.8% of copper in mixed wastewater was recovered as solid copper and copper oxides at a temperature of 600 degrees C, with their average sizes ranging from 150 to 160 nm. Our study showed that SCWO provides a synergetic effect for simultaneous treatment of acrylonitrile and copper-plating wastewater. During the reaction, the oxidation rate of acrylonitrile wastewater was enhanced due to the in situ formation of nano-catalysts of copper and/or copper oxides, while the exothermic decomposition of acrylonitrile wastewater supplied enough heat for the recovery of solid copper and copper oxides from copper-plating wastewater. The synergetic effect of wastewater treatment by the newly proposed SCWO process leads to full TOC conversion, color removal, detoxification, and odor elimination, as well as full recovery of copper.

Authors+Show Affiliations

School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 599 Gwanangno, Gwanak-gu, Seoul, Republic of Korea.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19231072

Citation

Shin, Young Ho, et al. "Synergetic Effect of Copper-plating Wastewater as a Catalyst for the Destruction of Acrylonitrile Wastewater in Supercritical Water Oxidation." Journal of Hazardous Materials, vol. 167, no. 1-3, 2009, pp. 824-9.
Shin YH, Lee HS, Lee YH, et al. Synergetic effect of copper-plating wastewater as a catalyst for the destruction of acrylonitrile wastewater in supercritical water oxidation. J Hazard Mater. 2009;167(1-3):824-9.
Shin, Y. H., Lee, H. S., Lee, Y. H., Kim, J., Kim, J. D., & Lee, Y. W. (2009). Synergetic effect of copper-plating wastewater as a catalyst for the destruction of acrylonitrile wastewater in supercritical water oxidation. Journal of Hazardous Materials, 167(1-3), 824-9. https://doi.org/10.1016/j.jhazmat.2009.01.062
Shin YH, et al. Synergetic Effect of Copper-plating Wastewater as a Catalyst for the Destruction of Acrylonitrile Wastewater in Supercritical Water Oxidation. J Hazard Mater. 2009 Aug 15;167(1-3):824-9. PubMed PMID: 19231072.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synergetic effect of copper-plating wastewater as a catalyst for the destruction of acrylonitrile wastewater in supercritical water oxidation. AU - Shin,Young Ho, AU - Lee,Hong-shik, AU - Lee,Young-Ho, AU - Kim,Jaehoon, AU - Kim,Jae-Duck, AU - Lee,Youn-Woo, Y1 - 2009/01/24/ PY - 2008/07/15/received PY - 2008/11/21/revised PY - 2009/01/16/accepted PY - 2009/2/24/entrez PY - 2009/2/24/pubmed PY - 2009/12/16/medline SP - 824 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 167 IS - 1-3 N2 - A new supercritical water oxidation process for the simultaneous treatment of mixed wastewater containing wastewater from acrylonitrile manufacturing processes and copper-plating processes was investigated using a continuous tubular reactor system. Experiments were carried out at temperatures ranging from 400 to 600 degrees C and a pressure of 25 MPa. The residence time was fixed at 2s by changing the flow rates of feeds, depending on reaction temperature. The initial total organic carbon (TOC) concentration of the wastewaters and the O(2) concentration at the reactor inlet were kept constant at 0.49 and 0.74 mol/L. It was confirmed that the copper-plating wastewater accelerated the TOC conversion of acrylonitrile wastewater from 17.6% to 67.3% at a temperature of 450 degrees C. Moreover, copper and copper oxide nanoparticles were generated in the process of supercritical water oxidation (SCWO) of mixed wastewater. 99.8% of copper in mixed wastewater was recovered as solid copper and copper oxides at a temperature of 600 degrees C, with their average sizes ranging from 150 to 160 nm. Our study showed that SCWO provides a synergetic effect for simultaneous treatment of acrylonitrile and copper-plating wastewater. During the reaction, the oxidation rate of acrylonitrile wastewater was enhanced due to the in situ formation of nano-catalysts of copper and/or copper oxides, while the exothermic decomposition of acrylonitrile wastewater supplied enough heat for the recovery of solid copper and copper oxides from copper-plating wastewater. The synergetic effect of wastewater treatment by the newly proposed SCWO process leads to full TOC conversion, color removal, detoxification, and odor elimination, as well as full recovery of copper. SN - 1873-3336 UR - https://www.unboundmedicine.com/medline/citation/19231072/Synergetic_effect_of_copper_plating_wastewater_as_a_catalyst_for_the_destruction_of_acrylonitrile_wastewater_in_supercritical_water_oxidation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(09)00098-3 DB - PRIME DP - Unbound Medicine ER -