Adsorption of Chlortetracycline from Water by Rectories*

Chin.J.Chem.Eng. ›› 2012, Vol. 20 ›› Issue (5): 1003-1007.

• ENERGY, RESOURCES AND ENVIRONMENTAL TECHNOLOGY • Previous Articles Next Articles

Adsorption of Chlortetracycline from Water by Rectories^*

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

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:2012-11-06 Published:2012-10-28
Supported by:
Supported by the Fundamental Research Funds for the Central Universities (2011YXL056);the National Program of Control and Treatment of Water Pollution (2009ZX07424-002)

Adsorption of Chlortetracycline from Water by Rectories^*

吕国诚¹, 吴丽梅¹, 王晓龙², 廖立兵¹, 王小雨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

通讯作者: LÜ Guocheng,E-mail:guochenglv@cugb.edu.cn;LIAO Libing,E-mail:lbliao@cugb.edu.cn
基金资助:
Supported by the Fundamental Research Funds for the Central Universities (2011YXL056);the National Program of Control and Treatment of Water Pollution (2009ZX07424-002)

Abstract

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 rectories 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

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 rectories 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

LÜ Guocheng, WU Limei, WANG Xiaolong, LIAO Libing, WANG Xiaoyu. Adsorption of Chlortetracycline from Water by Rectories^*[J]. Chin.J.Chem.Eng., 2012, 20(5): 1003-1007.

吕国诚, 吴丽梅, 王晓龙, 廖立兵, 王小雨. Adsorption of Chlortetracycline from Water by Rectories^*[J]. Chinese Journal of Chemical Engineering, 2012, 20(5): 1003-1007.

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Adsorption of Chlortetracycline from Water by Rectories^*

Adsorption of Chlortetracycline from Water by Rectories^*

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