期刊
JOURNAL OF SEPARATION SCIENCE
卷 36, 期 24, 页码 3949-3957出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201300972
关键词
Chromium; Mesoporous materials; Molecularly imprinted polymers; Selectivity; Speciation
资金
- National Natural Science Foundation of China [21207051, 21206059]
- Ph.D. Programs Foundation of Ministry of Education of China [20123227120015]
- China Postdoctoral Science Foundation [2012M511220, 2013M531284]
- Ph.D. Innovation Programs Foundation of Jiangsu Province [CXZZ13_0680]
- Society Development Fund of Zhenjiang [SH2012021]
- Programs of Senior Talent Foundation of Jiangsu University [11JDG125]
- Jiangsu University [201310299055W]
In the present study, a Cr(III)-imprinted polymer (Cr(III)-IIP) was prepared by an easy one-step sol-gel reaction with a surface imprinting technique on the support of silica mesoporous material. A new SPE method for the speciation, separation, preconcentration, and determination of Cr(III) and Cr(VI) by inductively coupled plasma atomic emission spectrometry and UV on the mesoporous-imprinted polymer adsorbent was developed. The structure of the imprinted polymer was characterized by Fourier transform infrared spectroscopy, X-ray powder diffraction, transmission electron microscopy, and nitrogen adsorption-desorption isotherms. The adsorption kinetics, thermodynamics behavior, and recognition ability toward Cr(III) on Cr(III)-IIP and nonimprinted polymer were compared. The results showed that Cr(III)-IIP had higher selectivity and nearly a two times larger Langmuir adsorption capacity (38.50 mg/g) than that of NIP. The proposed method has been successfully applied in the determination and speciation of chromium in natural water samples with satisfactory results.
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