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A study of the mechanism of fluoride adsorption from aqueous solutions onto Fe-impregnated chitosan
Zhang, J; Chen, N; Tang Z(唐正); Tang, Z; Yu, Y; Hu, QL; Feng, CP
2015
发表期刊PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷号17期号:18页码:12041-12050
文章类型Article
摘要The adsorption of fluoride from aqueous solutions onto an Fe-impregnated chitosan (Fe-CTS) granular adsorbent was studied, and the adsorption capacity was determined to be 1.9736 mg g(-1) at an initial fluoride concentration of 10 mg L-1. The effects of the initial fluoride concentration, dosage, and temperature were investigated using factorial design and analysis. The results indicated that high initial fluoride concentrations, low dosages, and low temperatures could enhance the fluoride adsorption capacity. In addition, Fe-CTS exhibited high selectivity for fluoride removal in the presence of high levels of several coexisting anions (nitrate, chloride, bicarbonate, and phosphate), except carbonate and sulfate. The adsorption process followed the Langmuir model at low fluoride concentrations and the Freundlich model at high initial fluoride concentrations. The data also fit the pseudo-second-order model. Scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy, and extended X-ray absorption fine-structure (EXAFS) spectroscopy were used to elucidate the adsorption mechanism. The FTIR and EXAFS analyses revealed that Fe was chelated with -NH2 and -OH groups on the CTS, and fluoride adsorption on the Fe-CTS occurred due to ion exchange between chloride and fluoride. Highlights: a granular Fe-impregnated chitosan (Fe-CTS) adsorbent was synthesized via chelation of Fe ions to -OH and -NH2 groups of CTS. The Fe-CTS granular adsorbent exhibited high performance for the adsorption of fluoride. The mechanism of fluoride adsorption on Fe-CTS was elucidated using EXAFS and FTIR analyses. Fluoride adsorption on Fe-CTS occurred via ion exchange between chloride and fluoride.
学科领域Chemistry; Physics
DOI10.1039/c5cp00817d
收录类别SCI
WOS类目Chemistry, Physical ; Physics, Atomic, Molecular & Chemical
WOS记录号WOS:000353767500013
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被引频次:26[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228560
专题多学科研究中心
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GB/T 7714
Zhang, J,Chen, N,Tang Z,et al. A study of the mechanism of fluoride adsorption from aqueous solutions onto Fe-impregnated chitosan[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2015,17(18):12041-12050.
APA Zhang, J.,Chen, N.,唐正.,Tang, Z.,Yu, Y.,...&Feng, CP.(2015).A study of the mechanism of fluoride adsorption from aqueous solutions onto Fe-impregnated chitosan.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,17(18),12041-12050.
MLA Zhang, J,et al."A study of the mechanism of fluoride adsorption from aqueous solutions onto Fe-impregnated chitosan".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 17.18(2015):12041-12050.
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