废水中离子对改性TiO_2催化剂降解盐酸四环素的影响  

Ions in the waste water influence the photocatalytic degradation of tetracycline hydrochloride by modified TiO_2 catalyst

作　　者：吴新民[1] 孙颖婷[1] 田培蓉 

机构地区：[1]西安石油大学石油工程学院,陕西西安710065

出　　处：《应用化工》2016年第3期450-452,460,共4页Applied Chemical Industry

基　　金：陕西省科技统筹创新工程计划项目(2011KTZB01-04)

摘　　要：利用水热法制备可见光活性较大的介孔TiO_2,以PVA-KI-I2复合物为修饰剂,在模拟太阳光作用下催化降解盐酸四环素,研究水中不同浓度的常见离子Cl-、NO3-、PO43-、SO42-、Ca2+和Na+对其降解效果的影响。结果表明,Cl-小于400 mg/L时,不影响盐酸四环素的光催化降解,随着Cl-浓度的增加,其抑制降解的效率会急速增加,当Cl-达到1 000 mg/L时,盐酸四环素的降解率下降27.75%。随着NO3-、PO43-和SO42-浓度的增加,离子对盐酸四环素降解的抑制作用同样会随之增强。而Ca2+和Na+对盐酸四环素的光催化降解有一定促进作用。PVA-KI-I2 modified mesoporous TiO_2 nanoparticles what has visible light activity were prepared by hydrothermal method. The tetracycline hydrochloride was degraded by mesoporous TiO_2 under the simulated sunlight. The effects of degradation efficiency of various concentrations of common ions such as chloride ions,nitrate ions,phosphate ions,sulfate ions,sodium ions and calcium ions in water were researched. The results indicate that when the concentration of chloride ion is less than 400 mg / L,it does not affect the photocatalytic degradation of tetracycline hydrochloride,With increasing concentration of chloride ion,which inhibiting the degradation efficiency will rapidly increase. when concentration of the chlorine ion gets 1 000 mg / L,the degradation rate of tetracycline hydrochloride dropped 27. 75%. With the increase of nitrate ions,phosphate ions,and sulfate ions concentration,inhibition of degradation will also increase. Sodium ions and calcium ions can promote the hotocatalytic degradation of tetracycline hydrochloride（ TC） to some extent.

关 键 词：阴离子 阳离子 盐酸四环素 光催化降解 

分 类 号：TQ46[化学工程—制药化工] X523[环境科学与工程—环境工程]