光催化降解阿特拉津的研究进展  

Research progress in atrazine photocatalytic degradation

作　　者：臧慧敏[1] 武世奎[1] 陈朝军[1] 王美玲[1] 胡密霞[1] 

机构地区：[1]内蒙古医科大学,内蒙古呼和浩特010010

出　　处：《工业催化》2015年第12期970-974,共5页Industrial Catalysis

摘　　要：阿特拉津作为一种高效廉价的除草剂被广泛应用于农业生产中,其结构稳定,难降解,已在水环境中大量检出,对生物及人体健康存在潜在威胁。与其他处理技术相比,光催化降解法对阿特拉津的降解起着重要作用。综述TiO_2光催化剂、经掺杂改性的TiO_2复合材料、金属离子及其复合物和金属氧化物对阿特拉津的光催化降解效率,并展望光催化材料的发展前景。高效的可见光光催化剂还有待开发,以增强对太阳光的吸收和利用,且应考虑将光催化降解法与其他处理技术相结合,开发既经济又高效去除阿特拉津的技术。综述阿特拉津的光催化降解机理,通过对降解过程中的中间产物鉴定,研究认为,阿特拉津三嗪环上的3个侧链经强氧化活性物种·OH进攻,发生烷基氧化、脱烷基化和脱氯羟基化等系列反应,最终被矿化为Cl^-、NO_3^-、CO_2和H_2O。Atrazine as a highly effective and cheap herbicide is widely used in agricultural production. Due to its stable structure and resistant-degradation, it has been detected in water environment. A lot of atrazine may cause potential harm to water and resident health. Compared with other treatment technologies, the photocatalytic degradation of atrazine has significant advantages. The photocatalytic degradation efficiency of atrazine on TiO2 photocatalyst, TiO2 composite materials with doping modification, metal ions and their complexes and metal oxides was summarized. The development prospects for the pbotocatalytic materials were introduced. In order to enhance the absorption and utilization of cheap sunlight, the visible light catalyst with high efficienee need to be developed. The photocatalytic degradation method combined with other processing technology should be considered to achieve an economic and efficient removal technology of atrazine. In addition, the photocatalytic degradation mechanism of atrazine was expounded. Through identifying the intermediate product in the degradation process, it was concluded that triazine ring of atrazine on three side chain attacked by the strong oxidation active species · OH caused a series of reactions such as alkylation oxidation was mineralized into Cl- ,NO3- ,CO2 ealkylation, and dechlorination hydroxylation, and atrazine finally H2O.

关 键 词：水污染防治工程 阿特拉津 光催化 降解机理 

分 类 号：O643.36[理学—物理化学] TQ034[理学—化学]