(733d) Electrocatalysts for the Simultaneous Removal of Nitrate and Ammonia from Wastewater
AIChE Annual Meeting
2019
2019 AIChE Annual Meeting
Sustainable Engineering Forum
Nanomaterial Applications for Human Health and the Environment
Thursday, November 14, 2019 - 4:45pm to 5:10pm
Electrochemical methods for separate removal of NO3- and NH3 has been extensively investigated [1, 3-5]. However, in this work, we demonstrate a new process that addresses both water pollutants simultaneously in an undivided flow cell that leads to a remarkable energy saving in the order of 35-65 % and 90 % less energy per grams of NO3- and NH3 removal, respectively. A new catalyst composition material is introduced to perform both NO3- /NH3 removal simultaneously. The concentration of NO3- andNH3 were measured according to the Environmental Protection Agency (EPA) standards, i.e., an UV-vis spectrophotometric based technique [6], and NH3 Ion Selective Electrode (ISE-THERMO), respectively. Effect of catalyst loading and other process operational conditions on the NO3- and NH3 removal rates were investigated. Findings of this work will be presented at the meeting.
References
[1] A. Estejab, and G.G. Botte, âAmmonia Oxidation Kinetics on Bimetallic Clusters of Platinum and iridium: A Theoretical Approachâ , Molecular Catalysis, vol. 445, pp. 279â292, February 2018.
[2] M. Li, Ch. Feng, Z. Zhang, Z. Shen, and N. Sugiura, âElectrochemical Reduction of Nitrate Using Various Anodes and a Cu/Zn Cathodeâ, Electrochemistry Communications, vol. 11, pp. 1853â1856, October 2009.
[3] C. Wanag, S. Chang, M. Ye, and Q. Ren, âCurrent Efficiency and Energy Consumption of Electrochemical Oxidation for Ammonia Removal from Coking Wastewater using Boron-doped Diamond Electrodesâ, Applied Mechanics and Materials, vol. 298, pp. 1327-1332, January 2013.
[4] H. Cheng, K. Scott, and P. A. Christensen, âPaired Electrolysis in a Solid Polymer Electrolyte reactorâSimultaneously Reduction of Nitrate and Oxidation of Ammoniaâ, Chemical Engineering Journal, vol. 108, pp. 257â268, April 2005.
[5] M. Majlesi, S. Mohseny, M. Sardar, S. Golmohammadi, and A. Sheikhmohammadi, âImprovement of Aqueous Nitrate Removal by Using Continuous Electrocoagulation/Electroflotation Unit With Vertical Monopolar Electrodesâ, Sustainable Environment Research, vol. 26, pp. 287-290, November 2016.
[6] T.A. Doane, and W.R. Horwath, âSpectrophotometric Detection of Nitrate with a Single Reagentâ, Analytical Letters, vol. 36, pp. 2713-2722, January 2003.