Abstract
A surface-imprinting technique combined with a sacrificial support process was established to synthesize a novel Ce(III)-imprinted polymer (CIP) in which attapulgite acts as the sacrificial support material. The CIP was compared with attapulgite, non-imprinted polymer (NIP), and with a Ce(III)-imprinted polymer where attapulgite acts as the support material (AIP). Fourier transmission infrared spectrometry, scanning electron microscopy, transmission electron microscopy, simultaneous thermogravimetry, nitrogen sorption, and laser particle sizing were employed, and an imprinting mechanism is suggested. Batch experiments were performed to evaluate adsorption kinetics, selective recognition, adsorption isotherms, desorption and regeneration performances of the CIP. The CIP offers fast adsorption kinetics for Ce3+, and the maximum adsorption capacity is 130 mg g−1, which is larger than that of AIP and attapulgite. The absorption abilities of Ce3+ from aqueous solutions followed the order CIP>AIP>attapulgite>NIP. CIP could be reused four times with only about 16% and 18% loss of adsorption capacity in pure Ce3+ solution and potentially interfering ion solution, respectively. The method was applied to the separation and determination of trace Ce3+ in river sediments. The relative standard deviation of the method is 2.6% (n = 6.0), and the detection limit (3σ) is 57 ng L−1.
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This work was financially supported by the National Natural Science Foundation of China (No.20877036).
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Table S-1
Working conditions of ICP-AES. (DOC 31 kb)
Table S-2
The BET surface area and pore volume for polymers. (DOC 29 kb)
Table S-3
Langmuir adsorption isotherm constants for attapulgite, AIP and CIP. (DOC 30 kb)
Table S-4
Separation factor (R L) for adsorption Ce3+. (DOC 29 kb)
Table S-5
Effects of type, concentration and volume of desorption agent on the desorption Ce3+. (DOC 38 kb)
Table S-6
Effect of potentially interfering ions on the recovery of Ce3+. (DOC 32 kb)
Fig. S-1
Competitive adsorption for metal ions onto the CIP and NIP. (DOC 57 kb)
Fig. S-2
The adsorption capacity of CIP after four cycles regeneration. (DOC 61 kb)
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Pan, J., Zou, X., Li, C. et al. Synthesis and applications of Ce(III)-imprinted polymer based on attapulgite as the sacrificial support material for selective separation of cerium(III) ions. Microchim Acta 171, 151–160 (2010). https://doi.org/10.1007/s00604-010-0416-z
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DOI: https://doi.org/10.1007/s00604-010-0416-z