论文部分内容阅读
为了解α－萘乙酸（ＮＡＡ）在环境中滞留、迁移和转化等行为，以低功率紫外灯和荧光灯为光源，对水溶液中的ＮＡＡ进行光降解．研究结果表明，主波长为２５４ｎｍ的紫外光能有效降解ＮＡＡ，降解呈一级动力学反应；而主波长为３６５ｎｍ的长波光对ＮＡＡ几乎不降解；添加ＴｉＯ２能有效催化ＮＡＡ的降解．采用ＧＣ－ＭＳ技术鉴定了几种光解主要产物，ＮＡＡ的光降解包括氧化脱羧和芳环的氧化断裂过程．
In order to understand the behavior of α-naphthaleneacetic acid (NAA) in the environment, such as retention, migration and transformation, NAA in aqueous solution was photodegraded by using low-power UV lamp and fluorescent lamp as light source. The results showed that the main wavelength of 254nm of UV light can effectively degrade NAA, the degradation was first-order kinetic reaction; while the main wavelength of 365nm long-wave light hardly degrade NAA; Add TiO2 can effectively catalyze the degradation of NAA. Several photolysis products were identified by GC-MS. The photodegradation of NAA included oxidative decarboxylation and oxidative cleavage of aromatic rings.