水溶液中壬基酚的TiO2光催化氧化处理研究

摘要

研究了水溶液中壬基酚的光催化氧化降解特性.结果表明,UV-TiO2光催化氧化可以有效降解水溶液中的壬基酚.采用15 W低压汞灯,当TiO2投加量为0.8 g/L,曝气速率为5.0 mL/min,光照距离为80 mm,壬基酚初始质量浓度为1.0 mg/L,pH=7.2时,壬基酚降解率可达90%以上;该降解过程较好地符合一级反应动力学模型.降解过程中,溶液TOC降解率小于壬基酚降解率,说明壬基酚的光催化降解会产生复杂中间产物.%The characteristics of photocatalytic oxidation degradation of nonylphenol in aqueous solution has been researched.The results show that the UV-TiO2photocatalytic oxidation can degrade the nonylphenol in aqueous so-lution effectively.The degradation rate of nonylphenol in aqueous solution can reach 90% and above,using 15 W low pressure mercury lamp,when TiO2dosage is 0.8 g/L,aeration rate 5.0 mL/min,irradiation distance 80 mm,nonylphe-nol initial mass concentration 1.0 mg/L,and pH=7.2.The degradation process complies with the first-order reaction kinetics model better.In the process of photocatalytic degradation,the degradation rate of TOC is lower than that of nonylphenol. It indicates that photocatalytic degradation of nonylphenol can produce some complex intermediate products.