均相光催化降解有机废水的研究

The Degradation of Organic Pollutant in Water by Homogenous Photocatalysis

以低压汞灯为光源,研究了活性艳红X-3B、中性枣红、罗丹明B3个水溶液体系在有氧条件下的纯光化学反应与均相光催化反应的情况。其中活性艳红X-3B是研究的主体,对影响体系反应的各种条件(包括溶液初始浓度、溶液pH值、催化剂品种、催化剂用量等)都进行了考察。结果表明,有机物的去除率随初始浓度的增大而减小,在pH值>10或pH<3时,降解效率可达80%;选定适宜催化剂后,可使有机物的降解效率在中性条件下提高1.5倍以上。另外还测定了其COD去除率,表明低压汞灯光照和高铁离子联用的处理效果非常好。由于本实验研究的水溶液均为高浓度体系,所以实验结果对饮用水净化和高浓度、难降解工业废水的处理有很好的应用效果,为之提供了一种新的有效方法。

The photocatalytic and photolytic degradation reactions of aqueous brilliant red X-3B,neutral claret luo-danmingB solution under the condition of saturated with oxygen or nitrogen were studied by employing the low voltage mercury lamp.Aqueous brilliant red X-3B solution is the principle part of the research,so all the conditions that will affect the degradation of the solution (such as initial X-3B concentration,pH,the sorts of catalytic agents,the amount of catalytic agents,etc.)were studied.The experimental results showed that the degradation rate was decreased with increasing the initial X-3B concentration and could reach about 80% when pH>10 or pH<3.Particularly,the degradation of the organic matters was increased by 1.5 times when choosing an optimal catalyst.Further,the rate of the degradation of COD was inspected, which showed that the result of the method employing UV allied with ferrate ion is extremely good.And the research provided a great way for the degradation of high concentration organic matter solution.