紫外(185nm)降解水中二苯甲酮影响因素的研究

Ultra-violet Light(185nm)Photodegradation of benzophenone in Wator

该文研究了浓度、流速、pH值以及CI^-、NO_3^-、CO_3^(2-)三种阴离子对医药中间体二苯甲酮降解效果的影响。用185nm紫外灯为光源,高效液相色谱仪(HPLC)为分析手段分析溶液中的二苯甲酮的浓度。试验结果证明二苯甲酮浓度增大、pH值增大,去除率降低；流速增大,去除率升高；三种阴离子对二苯甲酮的去除率都有降低作用。尤其是NO_3^-对二苯甲酮去除率的影响最为明显。

Objective investigation of the influence of different factors （concentration, velocity of flow, pH value, Cl^-, NO3^-, CO3^2- ） on photodegradation efficiency of benzophenone was introduced in this paper. The HPLC method was used to determine the residual concentration of benzophenone in the water which was irridated by 185nmUV. Conclusion was obtained with the increase of the concentration of benzophenone and pH value, the photodegradation rate is decrease. Increasing the velocity of flow is good for photodegradation rate. Cl^-,NO3^-,CO3^2- have obstructive effect to the photodegradation of benzopnenone solution and the photodegradation rate is effected by NO3 remarkably.