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

doi:10.11894/1005-829x.2017.37(11).023

Abstract

Abstract: A kind of agricultural waste corn husks modified by zirconium oxychloride solutions has been used for removing tetracycline from water bodies. Before and after the modification,corn husks should be characterized by SEM and FTIR. The influences of factors,such as initial solution pH,temperature,etc. on the adsorption for tetracycline have been investigated. The results show that the process of modification results in the changes in the surface structure of corn husks,and significant increase of adsorption capacity for tetracycline. When the initial pH is 5 and temperature 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 with Freundlich model,and the adsorption process complies with pseudo-second-order dynamic model.

Key words: corn husks, tetracycline, adsorption, zirconium, recycling

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。

关键词: 玉米苞叶, 四环素, 吸附, 锆, 资源化

CLC Number:

X703.5

Song Duanmei, He Zexiang, Shi Jing, Sun Jing, Yang Meigui. Enhanced adsorption for tetracycline from water by Zr(Ⅳ)-modified corn husks[J]. INDUSTRIAL WATER TREATMENT, 2017, 37(11): 23-26.

宋端梅, 何泽祥, 史静, 孙静, 杨梅贵. 锆改性玉米苞叶强化吸附水体中的四环素[J]. 工业水处理, 2017, 37(11): 23-26.

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URL: https://www.iwt.cn/EN/10.11894/1005-829x.2017.37(11).023

https://www.iwt.cn/EN/Y2017/V37/I11/23

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