|
|
|
| Pulse-electrochemical oxidation for methylene blue |
| LEI Jia-ni, LI Xiao-liang, YUAN Meng-meng, XU Hao, YAN Wei |
| Department Of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China |
|
|
|
|
Abstract In order to overcome the defects for the conventional electrochemical oxidation process, the pulsed power supply was introduced into electrochemical oxidation process with MB aqueous solution as simulated dye wastewater using the Ti/PbO2-PVDF electrode. The effects of five factors were analyzed, including initial concentration, pulse voltage, pulse frequency, duty ratio and NaCl concentration, on the degradation efficiency. The optimized parameters obtained were listed as, initial concentration of MB 100mg/L, the pulse voltage 5.5V, the pulse frequency 1500Hz, the duty cycle 50% and the NaCl concentration 0.01mol/L. Under this condition, the effect of electrochemical oxidation in the pulse and DC power supply mode were compared. The results showed that for the pulse mode, the MB decolorization rate, COD removal rate and current efficiency in 90min were 100%, 94.5% and 60.1%, respectively, which were higher than that in the DC mode. The energy consumption for the pulse mode was 0.013kWh/gCOD, which was far less than 0.107kWh/gCOD for the DC mode. The results showed that compared to the DC power supply mode, the pulse mode had obvious advantages.
|
|
Received: 27 September 2017
|
|
|
|
|
|
| [1] |
陈明功,齐永涛,张鑫敏,等.低温等离子体与絮凝剂处理印染废水的协同效应[J]. 中国环境科学, 2010,30(9):1207-1212.
|
| [2] |
应传友.电催化氧化技术的研究进展[J]. 化学工程与装备, 2010,(8):140-142.
|
| [3] |
Bagastyo A Y, Radjenovic J, Mu Y, et al.Electrochemical oxidation of reverse osmosis concentrate on mixed metal oxide (MMO) titanium coated electrodes[J]. Water Res, 2011,45(16):4951-4959.
|
| [4] |
徐浩,李晓良,张林,等.钛基体PbO2电极对脱附浓缩液的电催化降解[J]. 西安交通大学学报, 2017,51(3):92-97.
|
| [5] |
Xu H, Guo W, Wu J, et al. Preparation and characterization of titanium-based PbO2 electrodes modified by ethylene glycol[J]. Rsc Advances, 2016,6(9):7610-7617.
|
| [6] |
Shao D, Yan W, Li X, et al. Fe3O4/Sb-SnO2 Granules Loaded on Ti/Sb-SnO2 Electrode Shell by Magnetic Force:Good Recyclability and High Electro-oxidation Performance[J]. ACS Sustainable Chemistry & Engineering, 2015,3(8):1777-1785.
|
| [7] |
Li X, Shao D, Xu H, et al. Fabrication of a stable Ti/TiOxHy/Sb-SnO2 anode for aniline degradation in different electrolytes[J]. Chemical Engineering Journal, 2016,285:1-10.
|
| [8] |
张林,徐浩,冯江涛.钛基体PbO2电极对靛蓝盐的电催化去除研究[J]. 西安交通大学学报, 2016,50(5):134-139.
|
| [9] |
Yao Y, Dong H, Jiao L, et al. Preparation and Electrocatalytic Property of PbO2-CeO2 Nanocomposite Electrodes by Pulse Reverse Electrodeposition Methods[J]. Journal of the Electrochemical Society, 2016,163(5):D179-D184.
|
| [10] |
徐浩,郭午琪,王晓璇,等.超声对二氧化铅电极性质的影响[J]. 西安交通大学学报, 2015,49(7):82-87.
|
| [11] |
徐浩,张倩,邵丹,等.钛基体二氧化铅电极制备改性方法研究进展[J]. 化工进展, 2013,32(6):1307-1312.
|
| [12] |
李晓良,徐浩,延卫.十二烷基二甲基甜菜碱对Ti/PbO2电极的改性研究[J]. 西安交通大学学报, 2017,51(5):142-148.
|
| [13] |
Li X, Xu H, Yan W. Fabrication and characterization of PbO2 electrode modified with polyvinylidene fluoride (PVDF)[J]. Applied Surface Science, 2016,389:278-286.
|
| [14] |
Xu H, Li J, Yan W, et al. Preparation and characterization of titanium based PbO2 electrodes doped with some common elements[J]. Rare Metal Materials & Engineering, 2013,42(5):885-890.
|
| [15] |
Rajeshwar K, Ibanez J G. Environmental Electrochemistry:Fundamentals and Applications in Pollution Abatement[M]. San Diego, CA:Academic Press, 1997:Chapter 5, P140.
|
|
|
|
