超声波辐照和臭氧氧化协同降解废水中的结晶紫

采用超声波辐照、臭氧氧化以及超声波辐照-臭氧氧化降解废水中的结晶紫;考察了废水初始pH、超声波功率和频率、氧气流量、反应温度等因素对降解效率的影响.结果表明:超声波和臭氧对结晶紫的降解具有协同作用;当废水溶液初始质量浓度为200mg.L-1、pH为10.0时,控制超声波功率和频率分别为100 W和30kHz,氧气流量为0.4L.min-1,反应温度为25℃,反应时间为90 min,则总有机碳(TOC)的去除率可达89.2%,相应的一级反应速率常数为2.38×10-2min-1.

Degradation of crystal violet in wastewater under ultrasonic wave irradiation combined with ozone oxidizing

Crystal violet in wastewater was separately degraded by ultrasonic irradiation, ozone oxidizing, and ultrasonic irradiation combined with ozone oxidizing. The effects of initial pH value of wastewater, power and frequency of ultrasonic wave, flow rate of oxygen, and tem- perature on the degradation rate of crystal violet were investigated. Results indicate that ultra- sonic wave irradiation and ozone oxidizing are able to synergistically accelerate the degradation of crystal violet. When the degradation reaction is conducted at an initial wastewater solution concentration of 200 mg .L-1 and pH of 10.0, the removal rate of the total organic carbon can reach as much as 89.2 % while the power and frequency of ultrasonic wave, oxygen gas flow rate, temperature, and reaction time are adjusted as 100 W and 30 kHz, 0.4 L .min-1 , 25 ℃, and 90 min. Corresponding pseudo-first-order reaction rate constant is calculated to be 2.38×10-2min-1.