超声/紫外辐射协同降解水中碱性桃红的研究

采用超声（US）/紫外（UV）辐射协同降解水中碱性桃红,考察了US/UV的协同效应以及超声功率、染料初始浓度及初始pH对降解效率的影响,并对降解动力学规律作了初步探讨.结果表明,US与UV对碱性桃红的降解具有明显的协同效应,US/UV协同作用下的降解速率比US和UV两者单独作用时的降解速率提高了2倍.降解效率随超声功率的增大以及初始浓度的减小而增大,酸性和碱性条件下的降解效果较好,而中性条件下的降解效果较差.碱性桃红的降解为一级反应,降解速率常数随超声波功率的增大而呈线性增大,随碱性桃红初始浓度的增大而呈指数下降.

Study on Synergistic Degradation of C. I. Basic Red in Water by Ultrasound/Ultraviolet Light

Ultrasound/Ultraviolet light was used to degrade C. I. basic red in water in this paper. The synergistic effect of US and UV and the effect of US power,initial concentration and pH of C. I. basic red on degradation efficiencies were investigated. The degradation kinetics was also discussed. The results showed that the synergistic effect of UV and US on the degradation exists. The rate of the degradation by US/UV is 3 times of that only by UV or US. The degradation effciency increases with US power and decreases with increasing initial concentration. The higher removal rate can be obtained under basic or acid conditions. The removal rate is lower under neutral condition. The degradation conforms to first order reaction law. The degradation rate constant increases linearly with US power and decreases exponentially with increasing initial concentration of C. I. basic red.