摘要： 用铁碳微电解-臭氧协同降解水杨酸（SA）模拟废水，考察了pH、SA初始质量浓度、臭氧质量浓度、温度对降解效果的影响，确定了适宜的操作参数。结果表明，当pH=8，SA初始质量浓度为400 mg/L，臭氧质量浓度为17.2mg/L，25℃下反应30 min时，SA降解率达到99.93%。SA的降解符合拟一级动力学，建立了幂指数表达的动力学模型。通过发光菌相对抑光率评估模拟废水降解过程中的毒性变化。结果表明，在最佳操作条件下，降解60 min后，COD去除率达到79.34%，相对抑光率由99.68%降到23.68%。

关键词: 水杨酸, 铁碳微电解, 臭氧, 动力学, 毒性

Abstract: The iron-carbon micro-electrolysis-ozone process has been used for the synergetic degradation of simulated salicylic acid(SA) wastewater. The influences of pH,SA initial concentrations,O₃ concentration,and temperature on the degradation effect have been investigated,and the optimal operation parameters ascertained. The results show that when pH=8,SA initial concentrations is 400 mg/L,O₃ concentration 17.2 mg/L,reaction temperature 25℃, and reaction time 30 min,the SA degration rate reaches 99.93%. The degradation of SA accords with pseudo-firstorder kinetics,and the kinetics model expressed by power exponent is established. The toxicity changes in the degradation process of simulated wastewater is assessed by the photogenic bacterium relative light inhibiting rate. The results show that the removing rate of COD is 79.34% under optimal conditions after degraded for 60 min,and the relative light inhibiting rate is lowered from 99.68% to 23.68%.

Key words: salicylic acid, iron-carbon micro-electrolysis, ozone, kinetics, toxicity

中图分类号: 

• X703.1