锆改性玉米苞叶强化吸附水体中的四环素  

Enhanced adsorption for tetracycline from water by Zr(Ⅳ)-modified corn husks

作　　者：宋端梅 何泽祥 史静[1] 孙静[1] 杨梅贵 

机构地区：[1]中国药科大学环境科学系,江苏南京211198

出　　处：《工业水处理》2017年第11期23-26,共4页Industrial Water Treatment

基　　金：国家自然科学基金项目(51408612);江苏省自然科学基金(BK20140660);江苏省青蓝工程项目;中央高校基本科研业务项目(2015PT002);中国药科大学药学基地科研训练及科研能力提高项目(J1310032)

摘　　要：以农业废弃物玉米苞叶为原料,用氯氧化锆对其进行改性,用于去除水体中的四环素。采用SEM、FTIR对改性前后的玉米苞叶进行了表征,并研究了溶液初始pH、温度等因素对四环素吸附的影响。结果表明:改性过程使玉米苞叶表面结构发生变化,显著提高了其对四环素的吸附量。在30℃,四环素溶液初始pH=5的条件下,吸附量为54.1 mg/g。在293~313 K的温度范围内,吸附量随温度的升高而升高,等温吸附曲线符合Freundlich模型;吸附过程符合伪二级动力学模型。A kind of agricultural waste corn husks modified by zirconium oxychloride solutions has been used for re-moving tetracycline from water bodies. Before and after the modification,corn husks should be characterized bySEM and FTIR. The influences of factors,such as initial solution pH,temperature,etc. on the adsorption for tetracy-cline have been investigated. The results show that the process of modification results in the changes in the surfacestructure of corn husks,and significant increase of adsorption capacity for tetracycline. When the initial pH is 5 andtemperature 30 ℃,the adsorption capacity could reach 54.1 mg/g. When the temperature is in the range of 293-313 K,the adsorption capacity increases with the increase of temperature. The isotherm adsorption curve complies withFreundlich model,and the adsorption process complies with pseudo-second-order dynamic model.

关 键 词：玉米苞叶 四环素 吸附 锆 资源化 

分 类 号：X703.5[环境科学与工程—环境工程]