二氮杂半氰类阳离子红染料的光降解动力学研究  

Kinetics of Cationic Red X-GRL Photo-degradation in Immersion Photochemical Reactor

作　　者：赵伟荣[1] 史惠祥[1] 杨岳平[1] 汪大翚[1] 

机构地区：[1]浙江大学环境工程系,浙江杭州310027

出　　处：《高校化学工程学报》2004年第1期99-104,共6页Journal of Chemical Engineering of Chinese Universities

摘　　要：在浸没式光化学反应器中,用辐射波长为254nm的低压汞灯光降解二氮杂半氰类阳离子红X-GRL染料废水.实验考察了反应温度及pH等对阳离子红X-GRL光降解的影响.建立了光降解速率模型,并运用线光源球面辐射模型求解反应器的光辐射吸收流率,得到光量子产率介于30.11～48.70 L·einstein(1之间.利用最小二乘法,拟合得到了光量子产率与温度和pH等参量间的修正阿累尼乌斯回归方程(活化能为15.76 kJ·mol-1).The decomposition of Cationic Red X-GRL, an important color pollutant in the wastewater of the print and dyeing industry, was carried out by direct photo-degradation in an immersion photochemical reactor provided with a monochromatic low pressure mercury vapor UV radiation source. The conversions were obtained as a function of the operation variables (temperature and pH). The photo-degradation rate equation was deduced based on a proposed photo-degradation mechanism of the Cationic Red X-GRL. The Line Source Spherical Emission model was used to evaluate the radiation flow rate absorbed by the solutions in the photochemical process. The application of this model to experimental results gave the reaction quantum yields ranging from 30.11 to 48.70 Leinstein-1. Finally, by using least square regression analysis, the quantum yields were well correlated as a modified Arrhenius equation of temperature and pH with the activation energy of 15.76 kJmol-1.

关 键 词：阳离子红X-GRL 光降解 量子产率 速度常数 

分 类 号：X703.1[环境科学与工程—环境工程] X791