泡膜式介质阻挡放电等离子体去除模拟生产废水中的四溴双酚S

Removal of TBBPS from simulated production wastewater by bubble film dielectric barrier discharge plasma

为了有效的降解生产废水中的四溴双酚S(TBBPS),采用泡膜式介质阻挡放电等离子体处理装置,研究了放电等离子体对TBBPS降解的影响。分别探讨了放电电压、空气流量、液体流量、活性物质抑制剂对TBBPS降解效果的影响;考察了降解过程中pH、电导率、COD和生物毒性的变化。结果表明,在放电电压为12.5 kV、空气流量为1.8 L·min^(−1)、液体流量为150 mL·min^(−1)时,处理9 min后其TBBPS去除率达到95%以上;活性物质抑制剂对TBBPS的降解有一定的抑制作用,活性物质·O_(2)^(-)是反应体系中的主要活性物质;在降解过程中,pH不断下降,电导率不断上升,COD先升高后降低,生物毒性呈下降趋势。紫外-可见分光光度计全波扫描结果表明,TBBPS对应的特征吸收峰随处理时间变小,表明等离子体处理会破坏TBBPS的结构。以上研究结果可为TBBPS的有效降解提供参考。

In order to realize the effective degradation of tetrabromobisphenol S(TBBPS)in wastewater,a bubble-film dielectric barrier discharge plasma device was used to study the effect of discharge plasma on TBBPS degradation.The effects of discharge voltage,air flow rate,liquid flow rate and addition of the active substance inhibitors on the degradation of TBBPS were investigated,respectively,and the variations of pH,conductivity,chemical oxygen demand(COD)and biological toxicity during the degradation process were examined.The results showed that when the discharge voltage was 12.5 kV,the air flow rate was 1.8 L·min^(−1)and the liquid flow rate was 150 mL·min^(−1),the removal rate of TBBPS reached more than 95%after 9 min treatment.The active substance inhibitors had a certain inhibition effect on the degradation of TBBPS,and the active substance ·O_(2)^(-) was the main active substance in the reaction system.In the process of degradation,pH decreased,the conductivity increased,the COD increased first and then decreased,and the biological toxicity showed a downward trend.The full wave scanning results of UV-Vis spectrophotometer showed that the characteristic absorption peak of TBBPS decreased with the increase of treatment time,indicating that the plasma treatment could destroy the structure of TBBPS.The above results can provide a reference for the effective degradation of TBBPS.