| 附载TiO2光催化降解咪蚜胺农药 |
| 摘要点击 1928 全文点击 2281 投稿时间：1998-04-10 |
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| 中文关键词 光催化 咪蚜胺 TiO2 降解机理 降解速率 降解动力学 |
| 英文关键词 photocatalysis imidacloprid TiO2 degradation mechanism dynamics rate |
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| 中文摘要 |
| 以主波长365nm的黑炽荧光灯为光源,研究了由CMC-Na附载TiO2光催化降解咪蚜胺农药的过程。结果表明,咪蚜胺农药在3×8W黑炽荧光灯照射下,经附载TiO2作用3h后可降解50%以上,其光解可用假一级动力学方程表示。对于加CMC-Na附载的TiO2玻板,TiO2不易脱落,经多次使用其光催化活性不变,而直接附载的TiO2却有流失现象发生。另外,初探了以自然光为光源催化降解咪蚜胺农药的可行性。 |
| 英文摘要 |
| TiO2 catalysts adhered to the glass were used for investigating photocatalytic degradation of pesticide imidacloprid in aqueous solution under 3×8W fluorescent lamps.The results showed that the photocatalytic degradation rate of imidacloprid was high and up to above 50%.And the photolysis fit a first-order kinetic relationship well.The photolysis rate constant of imidacloprid decreased with increasing initial concentration,which was explained by two mechanisms of photocatalytic degradation.By contrast,adherent TiO2 films with adding Carboxymethyl Cellulose-Na to treat was not easy to take off and the catalytic activity would not drop.In addition,the feasibility the imidacloprid photocatalytic degradation under the sunlight was also studied. |
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