期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 211, 期 -, 页码 621-627出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2015.07.059
关键词
Sorption; Ion-imprinting; Quaternization; Magnetic microspheres; Perrhenate ion
资金
- National Natural Science Foundation of China [91326202, 21174100]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Qing-Lan Project of Jiangsu Province
- Jiangsu Key Laboratory of Radiation Medicine and Protection
It is significant for environment and human health to develop new materials for the sorption of radioactive technetium. We report herein a novel method to synthesize surface ion-imprinted magnetic microspheres for efficient capture of technetium ions. Specifically, perrhenate anion as the structural surrogate for pertechnetate anion, was employed as template to prepare ion-imprinted magnetic microsphere by one-pot radical polymerization and quaternization. The sorption behavior is closely related with the surface chemical composition: the more nitrogen content, the higher sorption efficiency. The sorption is an exothermic spontaneous sorption process and kinetically followed pseudo-second-order model. A sorption capacity of 62.8 mg of Re/g could be achieved at 298.15 K and pH = 6. Compared with non-imprinted composites, imprinted microspheres showed higher selectivity; faster kinetics, and larger sorption capacity of perrhenate ions. This work may provide a promising approach for the efficient sorption of pertechnetate. (C) 2015 Elsevier B.V. All rights reserved.
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