Abstract
In this study, the feasibility of N-methyldiethanolamine (MDEA) degradation by electrochemical activation of persulfate (PS) was evaluated. Effects of PS dosing, voltage and initial pH on the removal rate of MDEA were investigated. The removal rate of COD and TOC were more than 80% and 60% respectively when PS dosage was 0.84 mM, pH = 7 and voltage (U) was 50 V. Due to the synergistic effect between SO4-· and three-dimensional (3D) electrochemical system, the removal rate was increased by 23–61% compared to the system acting alone. Kinetic analysis showed that the degradation process followed a pseudo-first-order model reaction and that the apparent reaction rate constant (kobs) increased with increasing voltage over a range of values, but was greater at PS dosing levels of 0.84 mM and at neutral pH. Two possible pathways for the degradation of MDEA were proposed by Gas Chromatography-Mass Spectrometry (GC-MS) detection of the degradation products. The theoretical sulfate radical content of 1.653 × 10−5 mol/L was also calculated by dynamic model when the dosage of PS was 0.84 mM and the initial pH was 5.
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.
