Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (5): 1003-1007.

• 能源、资源与环境技术 • 上一篇    下一篇

累托石吸附分离水中金霉素

吕国诚1; 吴丽梅1; 王晓龙2; 廖立兵1; 王小雨1   

  1. 1 School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China 2 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
  • 收稿日期:2012-07-04 修回日期:2012-09-06 出版日期:2012-10-28 发布日期:2012-09-06

Adsorption of chlortetracycline from water by rectories

LÜ Guocheng1; WU Limei1; WANG Xiaolong2; LIAO Libing1; WANG Xiaoyu1   

  1. 1 School of Materials Sciences and Technology, China University of Geosciences, Beijing 100083, China 2 School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
  • Received:2012-07-04 Revised:2012-09-06 Online:2012-10-28 Published:2012-09-06

摘要： The removal of antibiotics from water by clay minerals has become the focus of research due to their strong adsorptive ability. In this study, adsorption of chlortetracycline (CTC) onto rectories was conducted and the effects of time, concentration, temperature and pH were investigated. Experimental results showed that adsorption equilibrium was reached in 8 h. Based on the Langmuir model, the maximum adsorption capacity of CTC on recto-ries was 177.7 mg•g?1 at room temperature. By the study on adsorption dynamics, it is found that the kinetic date fit the pseudo-second-order model well. The adsorption of CTC by rectories is endothermic and the free energy is in the range of ?10 to ?30 kJ•mol?1. The pH value of solution has significant effects on adsorption and the optimal pH is at acidity (pH 2-6). At concentration of 2500 mg•L?1, the intercalated CTC produces an interlayer space with a height of 1.38 nm, which is 1.12 nm in raw rectories, suggesting that the adsorption occurs between layers of rectories.

关键词: adsorption, rectory, chlortetracycline

Abstract: The removal of antibiotics from water by clay minerals has become the focus of research due to their strong adsorptive ability. In this study, adsorption of chlortetracycline (CTC) onto rectories was conducted and the effects of time, concentration, temperature and pH were investigated. Experimental results showed that adsorption equilibrium was reached in 8 h. Based on the Langmuir model, the maximum adsorption capacity of CTC on recto-ries was 177.7 mg•g?1 at room temperature. By the study on adsorption dynamics, it is found that the kinetic date fit the pseudo-second-order model well. The adsorption of CTC by rectories is endothermic and the free energy is in the range of ?10 to ?30 kJ•mol?1. The pH value of solution has significant effects on adsorption and the optimal pH is at acidity (pH 2-6). At concentration of 2500 mg•L?1, the intercalated CTC produces an interlayer space with a height of 1.38 nm, which is 1.12 nm in raw rectories, suggesting that the adsorption occurs between layers of rectories.

Key words: adsorption, rectory, chlortetracycline

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