紫外光-超声波协同降解苯酚水溶液的研究

Study on degradation of phenol aqueous solution by ultraviolet radiationcooperated with ultrasonic wave

有机酚类化合物造成的水体的污染,直接危害着人类的健康和生态环境,如何有效地处理环境水样中有机酚类化合物,是当今人们普遍关注的一个问题。以苯酚水溶液为研究对象,在紫外光和功率为150 W、40 kHz超声波的协同作用下,对苯酚的降解效率和降解规律进行了初步的研究,讨论了溶液的酸度、光辐射的时间、H2O2及Fe2+(FeSO4)等因素对苯酚溶液降解的影响,结果表明,单一超声波对苯酚的降解率很低,不超过6.5%。在紫外光一超声波协同辐射60 min,溶液的pH值为3-4,加入6%H2O2 4 mL,加入0.1 nmol·L-1Fe2+(FeSO4)1.6 mL,可达到91.8%的降解率。试验证明,利用紫外光-超声波协同照射是降解苯酚的一种有效方法。

The pollution of natural water caused by hydroxybenzene compound are increasingly serious nowadays, that disserve entironment and health of human. How effectively disposed of the hydroxybenzene compound in water samples from environment is concern of everybody. Degradation efficiency and rule of phenol aqueous solution by ultraviolet radiation cooperate with power of 150 W, 40 kHz ultrasonic wave was studied primarily, the influence of the acidity of solution, irradiation time, addition of H202 and Fe^2＋ （FeSO4） etc, on the degradation efficiency was discussed. The results of the experiment showed that the degradation ratio with ultrasonic wave was too low, and no more than 6.5%. addition of 4 mL 6% H2O2, 1.6 mL 10.0nmol·L^-1 Fe^2＋ （FeSO4）, ultraviolet radiation cooperated with ultrasonic wave irradiation time 60 min, pH value 3-4, the best degradation rate ofg1.8% was achieved, the results are satisfactory. This experimentation has proved was a efficient method of using ultraviolet radiation cooperated with ultrasonic wave to degrade phenol.