用紫外光去除水中的二苯甲酮的研究

二苯甲酮广泛应用于医日用化工等领域，对生物机体具有重要影响，研究通过室内分析的方法，以185 nm紫外灯为光源，研究了水中的二苯甲酮在185 nm紫外光照射下的降解行为及浓度、体积、流速、pH等因素对二苯甲酮的降解效果的影响。结果表明：185 nmUV对二苯甲酮溶液有很好的降解效果，可以迅速将其降解为小分子有机物直至无机物，185 nm紫外灯为光源降解水中的二苯甲酮符合准一级动力学规律。 pH值对反应速率有很大的影响，185 nmUV对二苯甲酮溶液的TOC浓度有较好的降低效果。这种方法对水中二苯甲酮的去除率最好能够达到99％以上，是一种非常有效的去除水中二苯甲酮的方法。

Photo-degradation of Benzophenone Solution by 185 nmUV Irradiation

The benzophenone has been widely used in the medical chemicals and other fields .Since it has crucial effect on the biological organism, this paper investigated on the photo -degradation of benzophenone in solution by 185 nmUV irradiation, and the HPLC(High Performance Liquid Chromatography) was introduced to determine its residual concentration in the treated water. The effects of the initial concentration, initial volume, flow velocity and pH of solution on the photo -degradation efficiency of benzophenone have also been studied .It was found that the 185 nmUV irradiation has great effect on the degradation of benzophe-none, with it the benzophenone can rapidly degraded into small molecule organic matter and ultimately inorganics .It also has been found that the pH of solution has important effect on the reaction rate , and the photo-degradation kinetics of benzophenone solution by 185 nmUV is( pseudo)-first order, the 185 nmUV irradiation can also degrade the concentration of TOC of benzophenone solu-tion.This is an effective method to degrade benzophenone in the water and its degradation validitycan reach 99% or above.