| 游离羟基及表面活性剂对乙草胺光解的影响 |
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| 引用本文： | 花日茂,徐利,岳永德,汤锋,李学德,操海群,吴祥为.游离羟基及表面活性剂对乙草胺光解的影响[J].环境科学学报,2006,26(9):1498-1503. |
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| 作者姓名： | 花日茂 徐利 岳永德 汤锋 李学德 操海群 吴祥为 |
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| 作者单位： | 1. 安徽农业大学资源与环境学院,安徽省"农产品安全"重点实验室,合肥,230036
2. 国际竹藤网络中心,北京,100102 |
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| 基金项目： | 国家自然科学基金
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安徽省优秀青年科技基金 |
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| 摘 要： | 以高压汞灯为光源,以p-亚硝基-N,N-二甲基苯胺(PNDA)作为·OH自由基的探针,研究了H2O2及表面活性剂0206-B(苯乙烯苯酚聚氧乙烯醚和十二烷基苯磺酸钙混剂)对除草剂乙草胺在水中间接光解作用的影响.结果表明,H2O2对水中乙草胺具有光敏化降解作用,其敏化作用效应与·OH有关;而0206-B对乙草胺具有光猝灭降解作用,光猝灭降解作用效应与0206-B减少水溶液中的·OH自由基含量有关.乙草胺直接光解与H2O2作用的乙草胺间接光解相同的产物有Rf(比移值)为0.12、0.52、0.61、0.72的化合物;H2O2敏化降解抑制了乙草胺直接光解产物Rf为0.04、0.10、0.18、0.21、0.79的化合物产生,但促进乙草胺间接光解Rf为0.45、0.66的新光解产物生成.
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| 关 键 词： | 乙草胺 光解 游离羟基 表面活性剂 |
| 文章编号： | 0253-2468(2006)09-1498-06 |
| 收稿时间： | 10 25 2005 12:00AM |
| 修稿时间： | 06 21 2006 12:00AM |
Effect of hydroxide radical and surfactant on photodegradation of acetochlor |
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| HUA Rimao,XU Li,YUE Yongde,TANG Feng,LI Xuede,CAO Haiqun and WU Xiangwei.Effect of hydroxide radical and surfactant on photodegradation of acetochlor[J].Acta Scientiae Circumstantiae,2006,26(9):1498-1503. |
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| Authors: | HUA Rimao XU Li YUE Yongde TANG Feng LI Xuede CAO Haiqun and WU Xiangwei |
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| Institution: | College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036,College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036,International Centre for Bamboo & Rattan, Beijing 100102,College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036,College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036,College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036 and College of Resources and Environment, Anhui Agricultural University, Key lab of Agricultural Food Safety of Anhui Province, Hefei 230036 |
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| Abstract: | Effects of H2O2 and surfactant 0206B on the indirect photodegradation of acetochlor in water were studied under the illumination of high-pressure mercury lamp with PNDA as the probe of·OH. The results showed that H2O2 exhibited photosensitive effects related to·OH. However, the photo-quenching effect were observed for 0206B and the effect was related to the concentration of·OH in water. There were same photodegradation products for both direct and indirect photolysis of acetochlor, and the Rf value of these compounds were 0.12, 0.52, 0.61, 0.72, respectively. Hydroxide radical prevented those photodegradation compounds with Rf value of 0.04, 0.10, 0.18, 0.21, 0.79, respectively. In contrast produced in direct photodegrdation, hydroxide radical brought on new products with Rf value of 0.45 and 0.66, respectively. |
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| Keywords: | acetochlor photodegradation hydroxide radical surfactant |
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