Adsorption mechanisms and the effect of oxytetracycline on activated sludge

被引：101
作者：
Song, Xiancai
Liu, Dongfang
Zhang, Guowei
Frigon, Matthew
Meng, Xianrong
Li, Kexun
机构：
[1] Nankai Univ, Coll Environm Sci & Engn Tianjin, Tianjin 300071, Peoples R China
[2] Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Key Lab Environm Remediat & Pollut Control, Minist Educ, Tianjin 300071, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2014年 / 151卷
基金：
中国国家自然科学基金;
关键词：
Adsorption; Metal ions; Cationic exchange; Surface complexation; HUMIC SUBSTANCES; TETRACYCLINE; SORPTION; SOIL; ANTIMICROBIALS; CU(II); CARBON; CLAYS;
D O I：
10.1016/j.biortech.2013.10.055
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The adsorption mechanisms and the effect of Oxytetracycline (OTC) onto activated sludge were studied. The results show that the adsorption of Oxytetracycline (OTC) onto activated sludge was coincident with the Langmuir, Freundlich and Temkin isotherm models. The Freundlich model had the best fit which suggested that chemical adsorption mechanism was dominant. The influences including pH and metal ions on the OTC were examined. It was demonstrated that the adsorption process was highly pH-dependant, which indicate that cationic exchange mechanisms may play an important role in the adsorption process. Na+, K+, Ca2+, Mg2+ and Cd2+ ions more or less inhibited the adsorption of OTC on activated sludge while Cu2+ enhanced the adsorption ability. The phenomenon may reflect the result that a surface complexation mechanism could involved in the adsorption. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：428 / 431
页数：4
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