胺唑草酮的光解动力学研究

为了研究胺唑草酮的光解规律及其对环境的影响，笔者采用液液分配-高效液相色谱法，通过室内模拟试验研究胺唑草酮在不同自然水体、不同pH缓冲溶液、不同表面活性剂、不同浓度腐殖酸中的光解动态。研究结果表明：胺唑草酮在碱性条件下光解最快，中性条件次之，半衰期分别为2.9h和6.4h。在酸性条件下最缓慢，半衰期为7.6h。胺唑草酮在4种不同类型水体中的光解速率顺序为：河水＞稻田水＞湖水＞蒸馏水。胺唑草酮在不同浓度腐殖酸中的光解半衰期分别为1.3、3.5和5.8h。在不同表面活性剂试验中，胺唑草酮在Span60中的光解最快，十二烷基苯磺酸钠次之，在Tween80存在的条件下降解最慢，其半衰期分别为2.1、2.5、10.2h。可得出结论，胺唑草酮在碱性和中性环境中不稳定；在河水中能较快光解；低浓度腐殖酸对胺唑草酮的光解有促进作用；在Span60存在的条件下最不稳定。

Study on Amicarazone Photolysis Kinetics

In order to study the photochemical degradation law and the environmental impact of amicarbazone, the author used the method of HLPC- UV, studied the photolysis dynamics of amicarbazone in different environmental water, different pH, different surfactants, different humic acids through laboratory simulation experiments. The results showed that the photolysis of amicarbazone was faster in alkaline solution than in neutral condition, and the half-lives were 2.9 h and 6.4 h. The photolysis was the slowest in acidic condition and the half-live was 7.6 h. The photolysis rates in 4 different types of water were : river water＞field water＞ lake water＞distilled water. The photolysis half-lives in different concentrations of humic acid were 1.3, 3.5 and 5.8 h. In the experiment of different types of surfactant, the photolysis rates were: Span 60＞SDBS＞ Tween 80, and the half-lives were 2.1, 2.5, 10.2 h, respectively. The amicarbazone was not stable in alkaline and neutral conditions, and it had a fast photolysis in river water. Low concentration humic acid could accelerate photolysis process of amicarbazone. Amicarbazone was not stable in Span 60.