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毒死蜱在土壤中的光催化降解
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摘要:
以500W氙灯为光源,研究了毒死蜱在2种不同土壤中的光化学降解以及土壤湿度,TiO2,Fe^3 对其光解的影响,结果表明,毒死蜱在土壤中光解较快,其半衰期为19.56-25.89h;TiO2,Fe^3 对其光解有显著的促进作用,光解半衰期分别缩短了14.98%和26.29%,土壤水分对于毒死蜱光解的影响与土壤质地有关。
关键词:  毒死蜱 光解 土壤 光敏剂 光催化降解 农药 药害
DOI:
修订日期:2001-10-23
基金项目:国家自然科学基金;29877001;
Studies on the Photodegradation of Chlorpyrifos in Soil
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Abstract:
The photodegradation of chlorpyrifos in two kinds of soils were studied under the irradiation of Xenon Lamp. The results showed that TiO 2,Fe 3+ accelerated the photolytic rates of chlorpyrifos in humid soil. Half lives of chlorpyrifos in humid soil,TiO 2,Fe 3+ were 23 70 h,20 15 h and 17 47 h,respectively. Soil properties were observed playing an important role in decreasing the photolytic rates of chlorpyrifos.
Key words:  chlorpyrifos,photodegradation,soil,phtosensitizer

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