紫外光降解水中磷酰基乙酸的特性研究  

Photodegradation of Phosphorylacetic Acid Under Ultraviolet Light Irradiation

作　　者：杜斌 DU Bin(Geological Exploration and Research Institute,China National Administration of Coal Geology,Beijing 100039,China)

机构地区：[1]中国煤炭地质总局勘查研究总院,北京100039

出　　处：《太原理工大学学报》2019年第2期180-185,共6页Journal of Taiyuan University of Technology

摘　　要：采用紫外光降解水中磷酰基乙酸,研究了光源、磷酰基乙酸初始浓度、溶液初始pH值以及不同形态氮对磷酰基乙酸光降解的影响。结果表明,紫外光照射下磷酰基乙酸发生直接光解和·OH,~1O_2参与的自敏化光解。紫外光辐射强度的增加有助于磷酰基乙酸的去除,1 000 W高压汞灯照射150min后,0.1mmol/L磷酰基乙酸溶液完全降解,降解速率为0.016 5min^(-1),光解半衰期为42min.随着初始浓度和溶液初始pH值升高,磷酰基乙酸的降解速率呈现下降趋势,NH_4^+,NO_3^-均对磷酰基乙酸光解有抑制作用。In order to understand the influence of the light source,the initial concentration and pH of solution in the photolysis process of phosphorylacetic acid,the phosphate released from phosphorylacetic acid degradation was investigated under UV irradiation.Results show that the photodegradation process of phosphorylacetic acid includes direct photolysis and self-sensitized photolysis involving ·OH and 1O2.The increase of ultraviolet radiation intensity is conducive to removal of phosphorylacetic acid,0.1 mmole/L phosphorylacetic acid solution is completely degraded under 1000 W high pressure mercury lamp irradiation within 150 min,the degradation rate is 0.0165 min^-1.The half-life of the photolysis is 42 min.As the initial concentration and the initial pH value of the solution increases,the reaction rate of phosphorylacetic acid shows a decreasing trend.Both NH4^+ and NO3^-have inhibitory effects on phosphorylacetic acid photolysis.

关 键 词：磷酰基乙酸 光降解 活性氧 

分 类 号：TQ085.4[化学工程]