甲酰氨基嘧磺隆在模拟环境中的降解特性

发布时间：2018-05-24 19:47

本文选题：甲酰氨基嘧磺隆 + 光解　；参考：《环境化学》2016年03期

【摘要】：甲酰氨基嘧磺隆是一种新型磺酰脲类除草剂,其在环境中的归趋备受关注.采用室内模拟试验方法,研究了甲酰氨基嘧磺隆在不同土壤中的降解性、水解和光解特性.结果表明,甲酰氨基嘧磺隆在光照强度4000 lx,紫外强度25μW·cm~(-2)的人工光源氙灯条件下,甲酰氨基嘧磺隆的光解半衰期为1.72 h,易光解.25℃时,pH4、pH7和pH9条件下水解半衰期分别为4.17、91.2、97.6 d,50℃时的水解半衰期分别为1 d、4.75 d和14.5 d,温度和p H值对水解速率具有较大影响.甲酰氨基嘧磺隆在江西红壤、太湖水稻土和东北黑土中的降解半衰期分别为10.8、16.6、31.5 d,该药在酸性土壤中降解较快,影响其在土壤中降解速率的主要因素为土壤pH值.
[Abstract]:Formyl aminosulfuron is a new sulfonylurea herbicide, and its fate in the environment has attracted much attention. The degradation, hydrolysis and photolysis of formyl aminosulfuron in different soils were studied by laboratory simulation. The results showed that under the conditions of light intensity of 4000 LX and UV intensity of 25 渭 W cm ~ (-2), the light source of formyl amosulfuron was xenon lamp, and the light intensity was 25 渭 W / cm ~ (-2). The photolysis half-life of formylpyridamole was 1.72 h, and the hydrolysis half-life was 4.17 ~ 91.2 ~ 97.6 d ~ (-1) d ~ (75) d and 14.5 d ~ (-1) at pH9. Temperature and pH value had a great influence on the hydrolysis rate. The degradation half-life of formylpyridamole in red soil, Taihu paddy soil and northeast black soil was 10.8 ~ 16.6N ~ 31.5 days, respectively. The degradation rate of formylpyridamole in acidic soil was relatively fast, and the main factor affecting the degradation rate was soil pH value.
【作者单位】：环境保护部南京环境科学研究所国家环境保护农药环境评价与污染控制重点实验室;
【基金】：中央级公益性科研院所基本科研业务专项(农药生态影响再评估技术研究2014-002) 2013年环保公益行业项目(2013467026)资助~~
【分类号】：X592

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