采用强电离放电生成高浓度氧活性粒子溶液  

Generating High-concentration Solution of Reactive Oxygen Species by Strong-field Ionization Discharge

作　　者：李日红[1] 白敏冬[1,2] 徐书婧 田一平[3] 李延建[3] 杨海东[3] 

机构地区：[1]大连海事大学轮机工程学院,大连116026 [2]厦门大学环境与生态学院,厦门361005 [3]大连海事大学物理系,大连116026

出　　处：《高电压技术》2014年第10期3054-3059,共6页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2012AA062609);国家科技支撑计划(2013BAC06B02);国家杰出青年科学基金(61025001)~~

摘　　要：为优化氧活性粒子（ROS）在水中的生成条件,并为ROS溶液生成装置提供优化系统参数的依据,研究了ROS质量浓度在水温、pH值、O2给气体积流量、ROS投加体积质量,以及系统气压（混溶压力）等因素作用下的变化规律.实验中,气态ROS在强电离条件下通过介质阻挡放电生成,以O3计,通过O3检测仪测定其浓度;水中ROS质量浓度采用DPD分光光度法测定,用CRS来表示.实验结果表明：水温、pH值与CRS呈极显著负相关（相关系数P＜0.01）,ROS投加体积质量与CRS呈极显著正相关（P＜0.01）,O2给气体积流量与CRS无显著相关性（P＞0.05）; CRS在水温分别为16℃与24.5℃之间、pH=6.5与pH=7.0之间、O2给气体积流量为2 L/min与3 L/min之间均为差异不显著（P＞0.05）,其余各水温、pH值、O2给气体积流量之间均为差异显著（P＜0.05）或差异极显著（P＜0.01）;较低混溶压力下CRS显著升高（P＜0.01）,20～40 mg/L ROS投加体积质量下混溶压力与O2给气体积流量交互作用对CRS有显著影响（P＜0.01）.分析认为：低温或偏碱性的水体、较大的ROS投加体积质量、较低的混溶压力均有利于提高ROS溶液的质量浓度;水温在低温范围内的改变、水体pH值在偏酸性及偏碱性范围内的改变、O2给气体积流量在较大量输入范围内的变化均会导致CRS的显著变化;较高的ROS投加体积质量下,对ROS溶液质量浓度影响能力由大到小依次为系统气压＞O2给气体积流量＞系统气压与O2给气体积流量交互作用.To optimize the generating condition of reactive oxygen species （ROS） in solution, and to provide a referencefor improving ROS preparation system, we investigated the effects of several parameters, including solution temperature,solution pH, 02 input, ROS dosages, and system pressure, on the concentration of obtained ROS solution. Gaseous ROSwas generated in a strong-field ionization condition induced by under dielectric barrier discharge （DBD）, and its dosagerepresented by 03 was measured by ozone monitor. ROS in solution was caught by DPD （N,N-diethyl-p-pHenylenediamine）, which was measured by DPD spectrophotometry, and the concentration of ROS solutionwas denoted by CRS. According to the experiments, both water temperature and pH have significant negative correlationwith CRS （relativefactor P〈0.01）, ROS dosage has significant correlation with CRS （P〈0.01）, but 02 input is not signifi-cantly correlated with CRS （P〉0.05）. The differences between CRS are insignificant （P〉0.05） under conditions ofsolution temperature of 16 ℃, 20 ℃, 24.5 ℃, solution pH of 6.5 and 7.0, as well as 02 input of 2 L/min and 3 L/min（P〉0.05）, but they are highly significant （P〈0.01） or significant （P〈0.05） under other tested conditions. Moreover, CRSsignificantly increases with the decrease of miscibility pressure （P〈0.01）, and it is significantly affected by the interactionbetween miscibility pressure and 02 input under higher ROS dosages （P〈0.01）. Lower water temperature, lower pH,higher ROS dosages, and lower miscibility pressure are all beneficial to increasing the concentration of ROS （CRS）,which is significantly affected by the change of several parameters including solution temperature in the lower range, pHaround 7, 02 input in the range of larger amount, etc. On the condition of high ROS dosage input, CRS is influenced bymiscibility pressure, 02 input, and the interaction between miscibility pressure and 02 input in a descending order.

关 键 词：强电离放电 介质阻挡放电 氧活性粒子 高级氧化技术 羟基自由基 ROS溶液 

分 类 号：O461[理学—电子物理学]