Removal of tetracycline antibiotics from aqueous solution by amino-Fe (III) functionalized SBA15

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	Removal of tetracycline antibiotics from aqueous solution by amino-Fe (III) functionalized SBA15
	Zhang, Ziyang; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui
刊名	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
	2015-04-20
卷号	471 页码:133-138
关键词	Adsorption Mesoporous silica Functionalized SBA15 Tetracyclines Complexation
英文摘要	The gradual increase of antibiotics in aquatic environments poses a serious threat to human health and ecosystems, and removal technology for antibiotics has attracted great interest in recent years. In this study, to improve the adsorption capacity of mesoporous silica, a new sorbent made by grafting both amino groups and Fe (III) on mesoporous silica SBA15 (named Fe-N,N-SBA15) was prepared and used for the removal of tetracycline antibiotics (TCs) from aqueous solution. The results showed that TCs sorption on Fe-N,N-SBA15 was highly pH-dependent, and the optimal pH was found to be 4.5-5.6 for tetracycline (TC), oxytetracycline (OTC) and chlortetracycline (CTC). The adsorption kinetics fitted the pseudo-second-order model perfectly and the adsorption rate constant followed the order OTC > TC > CTC. The adsorption isotherms study showed the maximum sorption capacity to be 143.31, 96.91 and 69.15 mmol kg(-1) for OTC, TC and CTC, respectively. The differences in the removal trends of the three TCs may be attributed to their different pK(a) values. A thermodynamic study showed that the adsorption of TCs on Fe-N,N-SBA15 is spontaneous (Delta G<0) and endothermic (Delta H>0). FTIR and XPS results showed that the high sorption capacity of antibiotics could be mainly attributed to the complexation of Fe (III) and TCs. (C) 2015 Elsevier B.V. All rights reserved.
研究领域[WOS]	Chemistry, Physical
WOS记录号	WOS:000351918600017
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32840]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Zhang, Ziyang,Lan, Huachun,Liu, Huijuan,et al. Removal of tetracycline antibiotics from aqueous solution by amino-Fe (III) functionalized SBA15[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2015,471:133-138.
APA	Zhang, Ziyang,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2015).Removal of tetracycline antibiotics from aqueous solution by amino-Fe (III) functionalized SBA15.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,471,133-138.
MLA	Zhang, Ziyang,et al."Removal of tetracycline antibiotics from aqueous solution by amino-Fe (III) functionalized SBA15".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 471(2015):133-138.