| H_2O_2对丙草胺在水体中光解的影响 |
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| 引用本文： | 徐正生,程燕.H_2O_2对丙草胺在水体中光解的影响[J].安徽农业科学,2006,34(23):6297-6298,6301. |
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| 作者姓名： | 徐正生 程燕 |
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| 作者单位： | 1. 安徽省环境监测中心站,安徽合肥,230036
2. 安徽省合肥市环境监测中心站,安徽合肥,230036 |
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| 摘 要： | 以高压汞灯和自然光为光源,研究了酰胺类除草剂丙草胺在水体中的光解动态,并以PNDA为探针,初步研究了双氧水对丙草胺光解的影响机理。由于H2O2能通过光解产生羟基自由基,从而对丙草胺表现出显著的光敏化降解作用。在高压汞灯下,H2O2使丙草胺的光解速率提高了1.74~4.55倍,但光敏率随H2O2浓度添加至一定量后而减弱;在太阳光下,H2O2使丙草胺的降解速率提高了33.6~81.58倍,敏化作用却随H2O2添加浓度的升高而增强。
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| 关 键 词： | 丙草胺 光解 过氧化氢 |
| 文章编号： | 0517-6611（2006）23-6297-02 |
| 收稿时间： | 2006-09-05 |
| 修稿时间： | 2006-09-05 |
Effects of H2O2 on Pretilachlor Photolysis in Aqueous Solution |
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| XU Zheng-sheng et al.Effects of H2O2 on Pretilachlor Photolysis in Aqueous Solution[J].Journal of Anhui Agricultural Sciences,2006,34(23):6297-6298,6301. |
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| Authors: | XU Zheng-sheng |
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| Institution: | Anhui Envirumental Monitoring Center, Hefei, Anhui 230036 |
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| Abstract: | The photolytic kinetics of anilide herbicides pretilachlor in aqueous solution irradiated by HPML,UV and sunlight was investigated.At the same time,the mechanism of the effect of H_2O_2 on pretilachlor was roughly expounded with PNDA as the ·OH probe.H_2O_2 produced hydroxyl radical((·OH)) upon UV irradiation,so the photodegradation of pretilachlor was greatly promoted.Under HPML irradiation,the photolysis rates of pretilachlor were improved about 1.74～4.55 times.But with the increasing of H_2O_2 dosage,the photosensitive rate was decreased.Under sunlight,the photolysis rates of pretilachlor were improved about 33.6～81.58 times with H_2O_2 and the photosensitive rate was improved with increasing dosage of H_2O_2. |
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| Keywords: | Pretilachlor Photodegradation Hydroxyl radical |
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