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Speciation, adsorption and determination of chromium( III ) and chromium( VI ) on a mesoporous surface imprinted polymer adsorbent by combining inductively coupled plasma atomic emission spectrometry and UV spectrophotometry
Author(s) -
Liu Yan,
Meng Xiangguo,
Han Juan,
Liu Zhanchao,
Meng Minjia,
Wang Yun,
Chen Rui,
Tian Sujun
Publication year - 2013
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201300972
Subject(s) - adsorption , inductively coupled plasma , chemistry , chromium , mesoporous silica , langmuir adsorption model , mesoporous material , molecularly imprinted polymer , polymer , desorption , fourier transform infrared spectroscopy , molecular imprinting , spectrophotometry , analytical chemistry (journal) , selectivity , chromatography , chemical engineering , organic chemistry , catalysis , plasma , physics , quantum mechanics , engineering
In the present study, a C r( III )‐imprinted polymer ( C r( 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 C r( III ) and C r( 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 C r( III ) on C r( III )‐ IIP and nonimprinted polymer were compared. The results showed that C r( III )‐ IIP had higher selectivity and nearly a two times larger L angmuir 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.