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- Title
Degradation of phenacetin wastewater by E-Fenton from modified palladium cathode.
- Authors
ZHANG Yong-gang; HUANG Yao-pei; LIU Ying
- Abstract
In order to improve the treatment effect of phemacetin pharnaceutical wastewater, the effects of different electrodes on the production of H2O2, ⋅OH production and chemical oxygen demand (COD) in the electro-Fenton (F-Fenton) process were studied by using the method of titanium salt, electron paramagnetic resonance(ESR) and potassium dichromate titration, and the best reaction conditions for the degradation of phenacetin were also investigated. The results show that the maximum concentration of H2O2 is 6.91 mg/L when the current density is 2.5 mA/cm², [Fe2+] = 0.1 mmol/L, pH = 3 and [Na2SO4] = 0.1 mol/L. The modified electrode has higher DMPO-OH current than the unmodified electrode, and can produce more hydroxyl radical ( ⋅ OH) at the same time. After electrocatalytic treatment of 120 min, the removal rate of phenacetion reached 81.2% respectively. The degradation of phenacetin by Electro-Fenton was in accordance with the first-order reaction kinetics, and the kinetic constant was 0.049 3. The results showed that the electrode could significantly improve the degradation efficiency of phenacetin, increase the yield of H2O2 and ⋅ OH, and shorten the reaction time.
- Subjects
ELECTRON paramagnetic resonance; PALLADIUM; CATHODES; CHEMICAL oxygen demand; SEWAGE
- Publication
Journal of Tiangong University, 2020, Vol 39, Issue 4, p53
- ISSN
1671-024X
- Publication type
Article
- DOI
10.3969/j.issn.1671-024x.2020.04.009