噻呋酰胺的光解和水解特性研究

为了明确噻呋酰胺的环境行为规律，采用室内模拟试验方法，研究了噻呋酰胺在不同条件下的光解和水解特性。结果表明:紫外灯照射下，噻呋酰胺在碱性条件下光解速率大于中性和酸性条件下的；不同溶剂中，噻呋酰胺的光降解速率依次为正己烷 >乙腈 >甲醇 >乙酸乙酯 >超纯水；三价铁离子、二价铁离子以及腐殖酸均能抑制噻呋酰胺的光降解。中性条件下，噻呋酰胺水解速率最快，同时，噻呋酰胺的水解受温度影响，温度越高，水解速率越快，平均温度效应系数1.39～2.23；表面活性剂十六烷基三甲基溴化铵（CTAB）和十二烷基磺酸钠（SDS）均可抑制噻呋酰胺在水中的降解。

Study on the photolysis and hydrolysis properties of thifluzamide

The photolytic and hydrolytic properties of thifluzamide under different conditions were investigated by using the indoor simulation test method. The results showed that the photolytic rate of thifluzamide, was much faster in alkaline solutions compared to that in the neutral and acidic solutions under ultraviolet irradiation. The photolytic rate of thifluzamide in different solvents followed the sequence:n-hexane >acetonitrile >methanol >ethylacetate >ultrapure water. The ferric ions, ferrous ions and humic acid could inhibit the degradation of thifluzamide. The fastest hydrolytic rate of thifluzamide was observed under the neutral conditions. The hydrolytic rate of thifluzamide could be accelerated by increasing the temperature, and the temperature coefficient was 1.39-2.23. The surface active agents CTAB and SDS could inhibit the hydrolytic rate of thifluzamide. The above results have provided a scientific basic for the environmental risk assessment of thifluzamide.