中文摘要：

实验以阳光照射6h为条件研究0．5‰TiO2-膨润土对水中十二烷基苯磺酸钠（SDBS）的降解过程，结果表明：阳光照射下，TiO2-膨润土复合催化剂去除水中SDBS的性能不仅优于TiO2，而且解决了TiO2颗粒细、难回收再用的问题；且在照射的同一时间段内，阳光中紫外光强度越强，SDBS的去除率越高，即使在北方冬天紫外光强度十分弱的条件下（20μW／cm2～180μW／cm2），TiO2膨润土复合催化剂仍能6h去除51．1％的SDBS。实验中还发现以太阳光为光源，TiO2-膨润土去除模拟废水中的SDBS的最佳条件是：pH值6．00，TiO2-膨润土的投加量约为0．5％。，模拟废水的初始浓度约为20mg／L，与以紫光灯为光源时的最佳条件相近。

英文摘要：

Solar photocatalytic degradation within 6h of Sodium Dodecyl Benzene Sulfonate （SD- BS） in aqueous solution by 0.5‰ TiO2-bentonite was studied. The results showed that： （1）TiO2 was very difficult to be recovered duo to the very small particle size of TiO2. The problem was solved by using TiO2-bentonite. Efficiency of SDBS removal by TiO2-bentonite was higher than that by TiO2 in the natural sunlight. （2）Natural sunlight as light source,the optimum condition that SDBS removal in aqueous solution by TiO2-bentonite was ： pH = 6.00, dosage of TiO2-bentonite =0. 5%0,original concentration of SDBS in aqueous solution = 20 mg/L. Above condition was similar to that as using ultraviolet light source. （3） In the same period,the higher the ultraviolet ray intensity of natural sunlight,the more of SDBS removal by TiO2-bentonite,even if ultraviolet ray intensity was very weak （ 20 μW/cm2-180 μW/cm2）,in such case, 51.1% SDBS was removed by TiO2-bentonite.