中文摘要：

采用有机膨润土做载体以延缓印楝素的释放，提高其在水中和光照下的稳定性。印楝素A（Aza—A）的水解和光降解过程可以用一级反应动力学描述，其半衰期分别为67．5、5．35h。有机膨润土能够降低印楝素A在水中的释放速率，且膨润土改性时有机阳离子用量越多，印楝素A释放越慢。有机膨润土做载体可以提高印楝素A在水中的稳定性，并可将其光降解半衰期延长到6．94h。

英文摘要：

Organic bentonites were used as carriers so as to slow the release of azadirachtin, and improve its stability in water and under irradiation. The hydrolysis and photo-degradation of azadirachtin-A （Aza-A） could be described with first-order reaction kinetics, and the half-lives were 67.5 h and 5.35 h respectively. Organic bentonites could reduce the release rate of Aza-A in water. The more organic cations used in modification of bentonite, the slower the release of Aza-A. As the carrier, the organic bentonites could improve the stability of Aza-A in water, and prolong the half-life of photo-degradation to 6.94 h.