Cd^(2+)和Pb^(2+)对四环素超声降解性能的影响  

Influence of Cd^(2+) and Pb^(2+) on ultrasonic degradation of tetracycline

作　　者：赵斌[1,2,3] 王风贺[1,2,3] 包健[4] 纪营雪[1,2,3] 段伦超[1,2,3] 

机构地区：[1]南京师范大学环境科学与工程系,南京210023 [2]江苏省地理信息资源开发与利用协同创新中心,南京210023 [3]江苏省物质循环与污染控制重点实验室,南京210023 [4]江苏省环境科学研究院,南京210036

出　　处：《环境工程学报》2015年第4期1599-1605,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(41473071;41101287);江苏省科技支撑计划项目(BE2012758);江苏省环保科研课题(2012005)

摘　　要：通过紫外分光光度法,研究了Cd2+和Pb2+对四环素超声降解过程的影响。研究结果表明,Cd2+和Pb2+在水中与四环素发生络合反应后,在紫外光谱上发生蓝移,在206 nm处产生新的峰值。同时,在低摩尔比(四环素∶重金属<1)时,Cd2+和Pb2+可以加快四环素的超声降解。0.01 mmol/L四环素溶液24 h的超声降解率为7.54%,加入Pb2+和Cd2+离子后,四环素去除率分别升高至20.82%和18.75%。在高摩尔比(四环素∶重金属>2)时,Cd2+和Pb2+抑制了四环素的降解,在0.08 mmol/L四环素溶液中,加入Pb2+和Cd2+离子反而使四环素去除率从4.69%分别降低至2.04%和1.40%。By using ultraviolet spectrophotometry,the effect of Cd2 +and Pb2 +on the ultrasonic degradation of tetracycline was studied. The results showed that Cd2 +and Pd2 +could complex with tetracycline in water,which making a blue shift on the ultraviolet spectrum,and a new peak at 206 nm appeared. With the low molar ratio( tetracycline: heavy metals < 1),Cd2 +and Pd2 +could accelerate the ultrasonic degradation of tetracycline.The degradation rate of 0. 01 mmol / L tetracycline solution was 7. 54% in 24 hour; when it was added with Pb2 +and Cd2 +,the degradation rate increased to 20. 82% and 18. 75%,respectively. With the high molar ratio( tetracycline: heavy metals > 2),when it was added with Pb2 +and Cd2 +in 0. 08 mmol / L tetracycline solution,the degradation rate reduced from 4. 69% to 2. 04% and 1. 40% respectively,which means that Cd2 +and Pb2 +have a inhibitory effect for the degradation of tetracycline.

关 键 词：Cd2+ PB2+ 四环素 超声 降解 紫外分光光度法 

分 类 号：X703.1[环境科学与工程—环境工程]