温度对纳米器件降解小白菜中有机磷农药残留的影响.pdf

※基础研究 食品科学 2008, Vol. 29, No. 10 121 1 1 1 1 2 张 兵 ，黄昭瑜 ，王 瑞 ，叶春玲 ，廖宗文 (1.深圳市无公害农产品质量监督检验站，广东深圳 518040 ；2.华南农业大学资环学院，广东广州 510642) ：本实验将蔬菜在不同温度条件用下纳米器件进行处理，研究温度对纳米器件降解蔬菜中十一种有机磷农 药残留效果的影响。结果表明：在30 ℃至0 ℃范围内，随温度降低蔬菜中有机磷农药残留的降解率升高，5 ℃时 最高，0 ℃略低，变化甚微。复合纳米胶片处理的蔬菜中十一种有机磷农药残留的降解率都随处理时间的延长而升 高，但1h 后降解率升幅趋平缓。400W 紫外中压汞灯照射可使降解率升高。 ：纳米材料；光催化降解；蔬菜；农药残留；温度 Effect of Temperature on Photocatalytic Degradation of Organophosphorus Pesticide Residues in Chinese White Cabbage by Nanomaterial Device 1 1 1 1 2 ZHANG Bing ，HUANG Zhao-yu ，WANG Rui ，YE Chun-ling ，LIAO Zong-wen (1.Shenzhen Inspection Station of Farm Produce, Shenzhen 518040, China ； 2. College of Nature Resoures and Environment, South China Agricultural University, Guangzhou 510642, China) Abstract ：The Chinese white cabbage was treated by nanomaterial device (TiO2-ZnO compound) at different temperatures. The effects of temperature on the photocatalytic degradation of eleven organophosphorus pesticide residues in the vegetable treated by the nanomaterial device were discussed. The results indicated that the degradation rate increases with the temperature decreasing from 30℃ to 0 ℃. The longer the treatment time,the higher degradation rates of the pesticide residues, and the increases of the degradation rate tend to flat after 1 hour. The 400 W ultraviolet mercury lamp irradiation can raise the degradation rates of the organophosphorus pesticide residues in the vegetable. Key words ：nanomaterial device ；photocatalytic degradation ；vegetable ；pesticides residue ；temperature 中图分类号：TS207.53