| 农药多菌灵的迁移转化规律研究 |
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| 引用本文： | 贺君,任小慧,王帅杰,杨红侠,邢丽飞,李飞.农药多菌灵的迁移转化规律研究[J].河南农业科学,2016(10):80-84. |
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| 作者姓名： | 贺君 任小慧 王帅杰 杨红侠 邢丽飞 李飞 |
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| 作者单位： | 1. 燕山大学 环境化学工程学院,河北 秦皇岛,066004;2. 燕山大学 机械工程学院,河北 秦皇岛,066004 |
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| 基金项目： | 河北省科技支撑计划项目(15273613) |
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| 摘 要： | 通过高效液相色谱法测定多菌灵的含量,初步探讨其挥发、水解、光解、分配这几种迁移转化途径,为合理利用农药、治理及控制农药对土壤等生态环境的污染提供指导。结果表明:多菌灵挥发作用不明显;p H值对多菌灵水解作用有影响,p H值为12时其水解率最大,达到0.16%,但总体上降解也不明显。采用太阳光、紫外灯、高压汞灯3种光源对多菌灵进行光降解,其中无氧化基团的情况下,太阳光基本不促进多菌灵降解,紫外灯下光解率达到3.73%,高压汞灯下达到4.96%;在有氧化基团时,无光照条件下降解率达到11.65%,太阳光下达到23.15%,紫外灯下达到61.61%,高压汞灯下达到94.97%,降解速率大小表现为高压汞灯紫外灯太阳光无光照,高于无氧化基团情况下的光降解。多菌灵的吸附率与土壤及腐植酸的含量呈正相关,在设置试验条件下分别可达到10.11%和90.89%。因此,光降解和土壤分配作用是多菌灵迁移转化的2种主要途径。
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| 关 键 词： | 多菌灵 挥发 水解 光解 分配 |
Research on Migration and Transformation Rule of Carbendazim |
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| Abstract: | By high performance liquid chromatography ( HPLC ) method for determining the content of carbendazim,the migration transformation ways of carbendazim including volatilization,hydrolysis,photol-ysis and distribution were discussed. The results showed that carbendazim volatilization was not obvious. pH had an effect on hydrolysis,and when the pH was 12,the largest degradation rate of 0. 16% was ob-tained,indicating that carbendazim hydrolysis was also not obvious. Sunlight,ultraviolet lamp,and high-pressure mercury lamp were used as light sources to photodegrade carbendazim,without oxidation groups in solution,sunlight basically did not promote carbendazim degradation,while ultraviolet lamp and high-pressure mercury lamp resulted in degradation rate of 3. 73% and 4. 96%,respectively. With oxidation groups in solution,the degradation rate reached 11. 65% without light conditions,and reached 23. 15%, 61. 61%, 94. 97% under sunlight,ultraviolet lamp,high-pressure mercury lamp,respectively. The photo-degradation rate showed high-pressure mercury lamp > ultraviolet lamp > sunlight > no light,all higher than that without oxidation groups. Carbendazim adsorption rate was positively correlated with the content of soil and humic acid,and could reach 10. 11% and 90. 89% respectively in this experiment. So photo-degradation and distribution are two main transformation and migration ways of carbendazim. |
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| Keywords: | carbendazim volatilization hydrolysis photolysis distribution |
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