摘要
为有效降解工业废水中的甲基紫,采用纳米TiO_(2)对现有同轴式介质阻挡放电装置进行改进,并分别探讨了输入电压、处理时间与放电气体对甲基紫降解效果的影响。结果表明,甲基紫降解率随处理时间与输入电压的增大而提高;在同等条件下,氧气等离子体对甲基紫的脱色效果明显优于空气等离子体,在输入电压为30 V、工作气体为氧气时,改进后装置只需2 min即可达到90%的甲基紫降解率,所需时间比改进前装置缩短了33.3%;在工作气体为空气时,处理2 min后改进后装置对甲基紫的降解率相比原装置提高了7%。对比了改进前后装置的发射光谱与电压-电流波形图,发射光谱结果表明改进后的放电装置能产生更多的激发态粒子;电压-电流波形图表明改进后装置的放电更剧烈,产生的丝状电流更大。利用纳米TiO_(2)对等离子体放电装置进行改进,可强化放电过程,使其产生更多活性物质,从而达到提高甲基紫降解效果的目的。
In order to effectively degrade methyl violet in industrial wastewater,the existing coaxial dielectric barrier discharge device was improved by using nano-titanium dioxide.The effects of input voltage,treatment time and discharge gas on degradation of methyl violet were discussed.The results showed that the degradation rate of methyl violet increased with the increase of treatment time and input voltage.Under the same conditions,the decolorization effect of methyl violet treated with oxygen discharge was significantly better than that treated with air discharge.When the input voltage was 30 V and the working gas was oxygen,the improved device could achieve 90%degradation rate of methyl violet only in 2 minutes,and the required time was 33.3%shorter than that of the original device.When the working gas was air,the degradation rate of methyl violet of the improved device was 7%higher than that of the original device after 2 minutes of treatment.The emission spectrum and voltage-current waveform of the device before and after improved were compared.The emission spectrum results showed that the improved discharge device could produce more excited state particles.The voltage-current waveform results indicated that the discharge of the improved device was more intense,and the filamentary current produced was much larger and more dense.The improvement of the device by using nano-sized titanium dioxide strengthened the discharge process,so that more active substances could be produced to improve the degradation of methyl violet.
作者
龚腾
李梦超
陈维
徐建军
黄骏
GONG Teng;LI Mengchao;CHEN Wei;XU Jianjun;HUANG Jun(School of Physics and Electronic Information,Gannan Normal University,Ganzhou 341000,China;Guixi Ninth Middle School,Yingtan 335400,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2023年第10期104-108,共5页
Industrial Water Treatment
基金
国家自然科学基金地区基金项目(52067002,22061002)
江西省主要学科学术和技术带头人-领军人才项目(20225BCJ22003)
江西省自然科学基金杰出青年项目(20212ACB211001)。
关键词
等离子体
介质阻挡放电
纳米TiO2
甲基紫
plasma
dielectric barrier discharge
nano-sized titanium dioxide
methyl violet
