第36卷，第12期 2016年12月
光谱学与光谱分析 Spectroscopy and Spectral Analysis
Vol.36,No.12+pp4135-4140
December, 2016
StudyonEmissionSpectrumofOHRadicalsinaCombination
System of Pulsed Discharge Plasma and Activated Carbon GUO He',WANGHui-juan'.2*,JIA Yuan-yuan,SUNChen-jing',
ZHOUGuang-shun',WUQiang-shun',YICheng-wu
1. School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China
2. Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, Suzhou 215009, China 3. Lanzhou Petrochemical Research Center, PetroChina, Lanzhou 730060, China
Abstract Based on the higher oxidation potential of OH radicals (2. 8 V), the synergetic effect of pulsed dis charge plasma (PDP) and activated carbon (AC) and the advantages of emission spectroscopic detection, such as easy operation, high accuracy and high sensitivity+ the relative emission spectra of the OH radicals genera ted in the PDP/AC system with oxygen flow were measured by the emission spectroscopic detection technique and the spectral intensity of the OH radicals was used to represent the relative amount of the OH radicals formed in the reaction system. The effect of additive amount of the AC, peak pulse voltage and electrode gap on the relative emission spectrum intensities of OH radicals were investigated to illustrate the crucial factors for the OH radicals formation in the PDP/AC system. In addition, the formation of OH radicals in the two liquid phases of distilled water and acid orange 7 (AO7) solution in the sole PDP system and the PDP/AC system were investigated to testify the synergetic mechanism of PDP/AC and the oxidization of OH radicals on the or ganic compounds in the reaction system. The obtained results showed that the catalytic effect of the AC in creased with the increase of the additive amount of the AC in the PDP system, which led to the increase of the relative emission spectral intensities of the formed OH radicals in the synergistic system; higher peak pulse voltage was in favor of the energy input in the discharge system and then enhanced the formation of OH radi-cals; increase of the electrode gap led to the decrease of energy efficiency in the reaction system and the de crease of the formed OH radicals in the PDP/AC system; the formation of OH radicals in the PDP/AC system was higher than that in the sole PDP system both in the distilled water and in the AO7 solution; the formation of OH radicals in the distilled water was higher than those in the AO7 solution no matter the reaction system was the sole PDP system or the PDP/AC system. The two results indicated that the AC addition was beneficial to the formation of OH radicals in the PDP system and the OH radicals had an important effect on the organic compounds degradation both in the sole PDP system and in the PDP/AC system.
Keywords Pulsed discharge plasma; Activated carbon; Synergistic effect; OH radicals; Emission spectrome-tric analysis
中图分类号：0657.3
文献标识码：A
Received : 201512-03; aceepted: 201604-07
D0l:10.3964/j.issn.10000593(2016)124135-06
Foundation item: National Natural Science Foundation Committee of China (21207052)
Corresponding author
万方数据
e-mail:wendyjuaner@126.com,hjwang@ujs.edu.cn