| 新型农药噻虫嗪的水解与光解研究 |
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| 引用本文： | 郑立庆,刘国光,孙德智.新型农药噻虫嗪的水解与光解研究[J].哈尔滨工业大学学报,2006,38(6):1005-1008. |
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| 作者姓名： | 郑立庆 刘国光 孙德智 |
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| 作者单位： | 1. 哈尔滨工业大学,市政环境工程学院,哈尔滨,150090;河南师范大学,化学与环境学院,河南,新乡,453007
2. 哈尔滨工业大学,市政环境工程学院,哈尔滨,150090 |
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| 基金项目： | 河南省高校杰出科研创新人才工程项目 |
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| 摘 要： | 通过实验,研究了噻虫嗪的水解与光解.实验结果表明,噻虫嗪在pH=7以下水解十分缓慢,在碱性条件下水解加速,表明噻虫嗪水解以碱催化为主;在碱性条件下水解速率随温度的升高而增加.噻虫嗪在甲醇溶剂中光解速率(t0.5=3.17 h)比在纯水中的光解速率(t0.5=5.99 h)快,而在丙酮中几乎不发生光解;光解速率随pH的升高而加快;温度对噻虫嗪在水中的光解速率影响不大,噻虫嗪的水解与光解皆符合一级反应动力学方程.
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| 关 键 词： | 噻虫嗪 水解 光解 |
| 文章编号： | 0367-6234(2006)06-1005-04 |
| 收稿时间： | 2004-12-30 |
| 修稿时间： | 2004年12月30 |
Study on the hydrolysis and photolysis of thiamethoxam |
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| ZHENG Li-qing,LIU Guo-guang,SUN De-zhi.Study on the hydrolysis and photolysis of thiamethoxam[J].Journal of Harbin Institute of Technology,2006,38(6):1005-1008. |
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| Authors: | ZHENG Li-qing LIU Guo-guang SUN De-zhi |
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| Affiliation: | 1. School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin, 150090, China, 2. College of Chemistry and Environmental Seienee, Henan Normal University, Xinxiang 453007, China |
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| Abstract: | The hydrolysis and photolysis of thiamethoxam were studied systematically.The experimental results showed that hydrolytic rate of thiamethoxam is very slow when the value of pH is below 7.However,the hydrolytic rate increased when pH>7,which indicate a basic catalytic degradation.The hydrolytic rate of thiamethoxam rise as temperature was raised in basic condition.The photolytic rate of thiamethoxam in methanol(t_(0.5)=3.17) is faster than that in water(t_(0.5)=5.99),and it can almost not be degraded in acetone.Temperature has little effect on photolysis of thiamethoxam in water.The photolytic rate of thiamethoxam becomes faster as increase of thiamethoxam concentration in water.The hydrolysis and photolysis of thiamethoxam fit first-order kinetic. |
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| Keywords: | thiamethoxam hydrolysis photolysis |
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