Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution
	Liu, Jie; Li, Wan-Yi; Liu, Yunguo; Zeng, Qinghui; Hong, Song
刊名	APPLIED SURFACE SCIENCE
	2014
卷号	293 期号:1 页码:46-54
关键词	Fluoride sorption Chitosan Biocomposites Titanium hydrate Nonlinear
ISSN号	0169-4332
中文摘要	A cost effective bio-adsorbent, titanium(IV) hydrate based on chitosan template (Ti-CHI), was synthesized using Ti(SO4)(2) and chitosan for defluoridation from aqueous solutions. The Ti-CHI material was characterized using FUR, SEM with EDX, XRD, XPS and Zeta potential. The adsorption kinetics of fluoride onto Ti-CHI followed pseudo-second-order and intra-particle diffusion models. The Ti-CHI was effective for defluoridating systems with low fluoride concentrations (4.52 mg/L), exhibiting a 87.50% removal rate and permitting a residual fluoride concentration (0.55 mg/L). The most stable pH range for fluoride removal was from 4 to 9. After combining the results of pH effects, FTIR and Zeta potential, the-NH groups and Ti-OH groups were revealed as the fluoride adsorption sites on Ti-CHI. In addition, the carbonate ions present in the aqueous solutions adversely impact the fluoride adsorption. The Langmuir, Freundlich, and Langmuir-Freundlich models were used to illustrate the isotherms of the adsorption process. The adsorption of fluoride onto Ti-CHI fits the Langmuir and Langmuir-Freundlich isotherm models well. The maximum adsorption capacity for fluoride on the Ti-CHI was 16.12 mg/g. Thermodynamic studies revealed that the adsorption process was spontaneous. (C) 2013 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000330576600006
公开日期	2015-03-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9611]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Liu, Jie,Li, Wan-Yi,Liu, Yunguo,et al. Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution[J]. APPLIED SURFACE SCIENCE,2014,293(1):46-54.
APA	Liu, Jie,Li, Wan-Yi,Liu, Yunguo,Zeng, Qinghui,&Hong, Song.(2014).Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution.APPLIED SURFACE SCIENCE,293(1),46-54.
MLA	Liu, Jie,et al."Titanium(IV) hydrate based on chitosan template for defluoridation from aqueous solution".APPLIED SURFACE SCIENCE 293.1(2014):46-54.