氟唑环菌胺在水中的光解影响因素研究  

Research on factors influencing photolysis of sedaxane in water

作　　者：姜喜龙 张富铭 熊阳 吕佳旭 李世聪 于晓龙 李佳南 高杉杉 王丽娜 侯志广 JIANG Xilong;ZHANG Fuming;XIONG Yang;LYU Jiaxu;LI Shicong;YU Xiaolong;LI Jianan;GAOShanshan;WANG Lina;HOU Zhiguang(College of Plant Protection,Jilin Agricultural University,Changchun 130118,China)

机构地区：[1]吉林农业大学植物保护学院,长春130118

出　　处：《农药》2025年第4期276-282,共7页Agrochemicals

基　　金：农业部行业标准制双炔酰菌胺在人参中的残留限量标准(14202008)。

摘　　要：[目的]明确氟唑环菌胺在水环境中的光解规律,为氟唑环菌胺的合理使用及风险性评估提供理论依据。[方法]采用20 W汞灯作为光源,利用高效液相色谱法进行检测。研究了不同初始质量浓度、不同pH、不同水体、Fe^(3+)、核黄素、腐殖酸及TiO_(2)对氟唑环菌胺光解速率的影响。[结果]氟唑环菌胺的初始质量浓度与其光解速率呈负相关。pH<7对氟唑环菌胺的光解起促进作用,pH≥7对氟唑环菌胺的光解起抑制作用。氟唑环菌胺在不同水体中的光解速率大小依次为超纯水>河水>湖水>井水。Fe^(3+)添加浓度对氟唑环菌胺的光解速率呈负相关。当核黄素和腐殖酸质量浓度为1、5 mg/L时会促进氟唑环菌胺的光解,质量浓度为50 mg/L时会抑制氟唑环菌胺的光解。TiO_(2)质量浓度为1、5 mg/L时会促进氟唑环菌胺光解,质量浓度为50、100 mg/L时会抑制氟唑环菌胺的光解。[结论]氟唑环菌胺初始质量浓度越大,光解速率越慢。氟唑环菌胺在酸性条件下更容易降解。氟唑环菌胺在河水、湖水、井水中的光解速率较慢。氟唑环菌胺的光解速率随Fe^(3+)浓度升高而减小。低浓度的核黄素、腐殖酸及TiO_(2)会促进氟唑环菌胺的光解,高浓度抑制氟唑环菌胺的光解。根据光解试验中农药光解特性等级划分,20 W汞灯条件下,氟唑环菌胺在水溶液中属于较易光解农药。[Aims]This research aims to clarify the photolysis law of sedaxane in water environment and provide theoretical basis for the rational use and risk assessment of sedaxane.[Methods]A 20 W mercury lamp was used as the light source and high-performance liquid chromatography was used for detection.The effects of different initial mass concentrations,pH,water bodies,Fe^(3+),riboflavin,humic acid and TiO_(2)on the photolysis rate of sedaxane were studied.[Results]The initial mass concentration of sedaxane was negatively correlated with its photolysis rate.When the pH value<7,it promoted the photolysis of sedaxane,while pH value≥7 it inhibited the photolysis of sedaxane.The photolysis rate of sedaxane in different water bodies was in the order of ultrapure water>river water>lake water>well water.The added concentration of Fe^(3+)was negatively correlated with the photolysis rate of sedaxane.When the mass concentration of riboflavin and humic acid was 1 and 5 mg/L,it promoted the photolysis of sedaxane,while it inhibited the photolysis of sedaxane at a mass concentration of 50 mg/L.When the mass concentration of TiO_(2)was 1 and 5 mg/L,it promoted the photolysis of sedaxane,while it inhibited the photolysis of sedaxane at 50 and 100 mg/L.[Conclusions]The higher the initial mass concentration,the slower the photolysis rate of sedaxane.Sedaxane was more easily degrades under acidic conditions.The photolysis rate of sedaxane in river water,lake water and well water was relatively slow.The photolysis rate of sedaxane decreases with the increasing of Fe^(3+)concentration.Riboflavin,humic acid and TiO_(2)at low concentrations promote the photolysis of sedaxane,while they inhibit the photolysis of sedaxane at high concentrations.According to the classification of pesticide photolysis characteristics in the photolysis test,under the condition of a 20 W mercury lamp,sedaxane is a pesticide that is relatively easy to photolysis in aqueous solution.

关 键 词：氟唑环菌胺 高效液相色谱法 水环境 光解 

分 类 号：TQ450.2[化学工程—农药化工]