气液两相滑动弧等离子体降解染料废水的研究

Degradation of dyeing wastewater by gas-liquid gliding arc plamsa

研究了气液两相滑动弧等离子技术对不同种类的可溶性染料废水的处理效果,考察了染料分子中的磺酸基数目、N=N双键数目、染料分子的不同主体结构等对染料降解效果的影响。结果表明,染料分子中的磺酸基数目越多,则染料的降解率越高;不论染料分子主体结构如何,氧化性物质可能均首先攻击分子中的发色基团,导致染料脱色;主体结构不同的染料混合时,可对COD的降解起到一定促进作用;染料分子中氯的取代位置不同,则脱氯率也不同,氯连接在直链或苯环上时较容易降解,而连接在均三嗪结构上时较难降解;从能量效率上考虑,气液两相滑动弧等离子体技术更适合降解高浓度的染料废水。

The gas-liquid gliding arc plasma technique was employed for the treatment of different water-soluble dye wastewater and the effect of sulfonic group, N= N group, molecule structure of dyes on dyes decolorization was investigated. Results showed that sulfonic group played an important role on dye degradation, the more sulfonic group contained, the easier it would be degraded; the oxidizing substances which produced by gas-liquid gliding arc plasma decolorization the dyes by oxidizing chromophoric group; mixing the dyes with different molecule structure could enhance the COD degradation, the dechlorination rate of dyes were depend on chlorine substituting position, the chlorine linked in carbon chain and benzene ring were easier be degraded than that linked in triazine structure. To consider from energy efficiency, the gas-liquid gliding arc plasma technique was more suitable for degrading the high concentration dye wastewater.