摘要
为了强化混合气液两相放电处理水中有机物的过程,在两电极之间添加活性氧化铝填料,并且待处理溶液以雾状液滴形式均匀布洒在填料表面。动态连续流实验结果表明,当反应电压为25 kV、pH值为11、亚甲基兰溶液初始质量浓度为5 mg/L、反应时间为120 min时脱色率达到最高。各种反应条件下的能量利用效率范围为36.56-233.65 mg/(kWh)。pH值对于反应结果影响较大,在pH较高时能量利用效率较高。而在pH值一定时能量的利用率随着流速的增加和亚甲基兰初始质量浓度的增加而增加。高压脉冲电场和活性氧化铝填料之间的相互作用促进了亚甲基兰的降解。
Hybrid gas-liquid electrical discharge for removing the pollutants in aqueous solution was investigated for the decolorization of methylene blue（ MB）. In order to promote the process of hybrid gas-liquid electrical discharge, some activated alumina particles were filled between the two electrodes, and the solution to be treated was sprinkled on the surface of the particles. Due to these particles existing in the reaction region, the space and time distribution of discharge became more uniform. And at the same time the activated alumina particles could be polarized when the pulsed high voltage was applied on the electrodes, a strong electrical field would be formed around every particles, which induced the formation of the local discharge. The results of dynamic experiment indicate that the biggest removal efficiency of MB could be reached under the conditions of applied voltage 25 kV, initial concentration of MB 5mg/L and initial pH value 11 after 120min＂ reaction. The deeolorization rate increased with increasing applied voltage, decreasing flow rate, decreasing initial concentration and increasing pH value of the solution. The energy efficiency was （36.56-233. 65）mg/（kWh） at different conditions, pH was a very important factor for the removal rate of MB in the pulsed high voltage discharge. When pH was higher, the energy efficiency could be higher. In the pulsed high voltage electric field, activated alumina enhanced the electric intensity and simultaneously the discharge between the electrodes also increased the adsorption of activated alumina for MB. The synthetic effects of the high voltage electrical field and activated alumina accelerated the degradation course of MB.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2007年第2期132-135,共4页
High Voltage Engineering
基金
高等学校科技创新工程重大项目培育资金项目(705013)
关键词
高压脉冲电场
混合气液两相放电
活性氧化铝
亚甲基兰
脱色
水处理
pulsed high voltage electric field
hybrid gas-liquid electrical discharge
activated alumina
methylene blue
decolorization
water treatment
