紫外强化CuO活化过硫酸盐降解罗丹明B染料废水

Degradation of Dyeing Wastewater Containing Rhodamine B by CuO-activated Persulfate with UV Strengthening

该研究通过UV还原强化CuO活化过硫酸盐(CuO/PS)体系。以罗丹明B为目标污染物,考察了初始pH、CuO浓度、PS浓度及UV功率等因素对降解率的影响。结果表明,初始p H 3.0,CuO浓度为8 mmol/L,PS浓度为1.5 mmol/L,UV功率30 W时,RhB降解率最佳,能达到94.6%。与无UV强化相比,降解率升高114.5%。适当降低初始pH或增加CuO浓度、PS浓度及UV功率均能促进体系内RhB降解。XPS分析表明,紫外能将Cu2+还原成Cu+,从而强化体系。紫外-可见吸收光谱显示,RhB降解过程主要包括发色基团断裂和苯环结构开环等两大步骤。

Through UV reduction, the CuO-activated persulfate(CuO/PS) system is strengthened. With Rhodamine B as the target pollutant, the effects of factors such as initial pH, CuO concentration, PS concentration, and UV power on the degradation rate were investigated. The results showed that when the initial pH was 3.0, CuO concentration 8 mmol/L, PS concentration 1.5 mmol/L, and UV power 30 W, the RhB degradation rate was the best, reaching 94.6%. Compared with non-UV strengthening, the degradation rate is increased by 114.5%. Properly reducing the initial pH or increasing the CuO concentration, PS concentration, and UV power can promote RhB degradation in the system. XPS analysis shows that UV can reduce Cu2+to Cu+, thereby strengthening the system. Ultraviolet-visible absorption spectrum shows that the degradation process of RhB mainly includes two steps: chromophore group breaking and ring opening of benzene ring structure.