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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.