膨润土对盐酸四环素的吸附性能  

Adsorption characteristics of tetracycline hydrochloride onto bentonite

作　　者：张佳琪[1,2,3] 陈亚君[1,2,3] 王风贺[1,2,3] 赵斌[1,2,3] 

机构地区：[1]南京师范大学环境学院,南京210023 [2]江苏省物质循环与污染控制重点实验室,南京210023 [3]江苏省地理信息资源开发与利用协同创新中心,南京210023

出　　处：《环境工程学报》2016年第9期4808-4814,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(41473071)

摘　　要：研究了初始投加量、吸附时间、吸附温度、振荡频率以及溶液p H值等不同条件下,膨润土对水溶液中盐酸四环素的吸附特性,并对其吸附机理进行了解释。研究结果表明,膨润土对盐酸四环素的吸附可在2 h达到吸附平衡,最佳吸附温度为35℃、最佳振荡频率为180 r·min-1,p H值的升高有利于膨润土对盐酸四环素的吸附。由膨润土对盐酸四环素的吸附动力学可知,该吸附过程符合准二级动力学模型。The influences of bentonite dosage, adsorption time, adsorption temperature, oscillating fre- quency, and solution pH on the adsorption performance of tetracycline hydrochloride onto bentonite were exten- sively investigated, and an adsorption mechanism developed. The results indicated that tetracycline hydrochloride reached its adsorption equilibrium after 2 h, and that the ideal adsorption temperature was 35℃ with an optimal oscillating frequency of 180 r ·min-1 The adsorptive capacity of bentonite for tetracycline hydrochloride in- creased with increasing solution pH. Analysis of the adsorption dynamics indicated that the pseudo-second-order model fit the adsorption of bentonite quite well.

关 键 词：膨润土 吸附 盐酸四环素 

分 类 号：X131.2[环境科学与工程—环境科学]