1.中国疾病预防控制中心辐射防护与核安全医学所 辐射防护与核应急中国疾病预防控制中心重点实验室 北京 100088
2.China CDC Key Laboratory of Radiological Protection and Nuclear Emergency, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing 100088, China
孔祥银,男,1992年1月出生,2013年7月于中国药科大学获得学士学位,现为中国疾病预防控制中心辐射防护与核安全医学所硕士研究生,放射医学专业
吉艳琴,博士,研究员,E-mail:jiyanqin@nirp.cn
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孔祥银, 邵宪章, 陈飞, 等. 冠醚包覆聚苯乙烯磁性颗粒的合成、表征及其对锶离子的吸附性能[J]. 辐射研究与辐射工艺学报, 2016,34(2):20302.
Xiangyin KONG, Xianzhang SHAO, Fei CHEN, et al. Synthesis and characterization of crown-ether-coated poly (styrene/divinylbenzene) magnetic particle and evaluation of its adsorption behavior for strontium (Ⅱ)[J]. Journal of Radiation Research and Radiation Processing, 2016,34(2):20302.
孔祥银, 邵宪章, 陈飞, 等. 冠醚包覆聚苯乙烯磁性颗粒的合成、表征及其对锶离子的吸附性能[J]. 辐射研究与辐射工艺学报, 2016,34(2):20302. DOI: 10.11889/j.1000-3436.2016.rrj.34.020302.
Xiangyin KONG, Xianzhang SHAO, Fei CHEN, et al. Synthesis and characterization of crown-ether-coated poly (styrene/divinylbenzene) magnetic particle and evaluation of its adsorption behavior for strontium (Ⅱ)[J]. Journal of Radiation Research and Radiation Processing, 2016,34(2):20302. DOI: 10.11889/j.1000-3436.2016.rrj.34.020302.
为建立应用磁性颗粒快速分离低水平,90,Sr的方法,分别以沉淀法合成Fe,3,O,4,纳米颗粒,微乳聚合法合成磁性聚苯乙烯-二乙烯苯颗粒(Pst-DVB@Fe,3,O,4,),并将4,4'(5')-二叔丁基二环己基-18-冠-6(DtBuCH18C6)通过物理作用包覆在Pst-DVB@Fe,3,O,4,颗粒表面,最终生成一种新型的核-壳结构的DtBuCH18C6包覆的聚合物磁性颗粒(DtBuCH18C6@Pst-DVB@Fe,3,O,4,)。采用扫描电镜、红外光谱、X射线光电子能谱等方法对颗粒的形貌、结构、表面元素组成及含量进行分析。用于分离水溶液中Sr,2+,的批实验结果表明,Sr,2+,的吸附量随着pH值而增加,而在pH=11和pH=13之间急剧上升,温度升高,其吸附量增加。吸附动力学模型结果表明,Sr,2+,在DtBuCH18C6@Pst-DVB@Fe,3,O,4,表面的吸附更接近于其和Sr,2+,之间形成络合物的单层化学吸附过程,符合Langmuir模型。在优化的条件下其最大吸附容量为2.62 mg/g。
To develop a method for rapid separation of low level ,90,Sr using magnetic particles, Fe,3,O,4 ,nanoparticles were prepared by coprecipitation method, and poly (styrene/divinylbenzene) magnetic particles (Pst-DVB@Fe,3,O,4, PF) were synthesized by emulsion polymerization. Finally a new kind of core-shell structure magnetic particle coated with DtBuCH18C6 (DtBuCH18C6@Pst-DVB@Fe,3,O,4, DPF) was developed. The morphology, structure, composition and content of surface elements were analyzed by scanning electron microscope, FT-IR spectroscopy and X-ray photoelectron spectroscopy,etc,. The batch experiment results for the separation of Sr,2+, in aqueous indicated that the adsorption of Sr,2+, to DPF increased with pH value and showed a drastic increase from pH 11 to pH 13. The kinetic model showed that the adsorption of Sr,2+, to DPF was most likely to be a monolayer chemisorption process ,via, forming complexation between DPF and Sr,2+, which was consistent with Langmuir isotherm model. The maximum adsorption capacity of Sr,2+, to DPF was 2.62 mg/g under optional conditions.
磁性颗粒冠醚锶吸附性能
Magnetic particlesCrown etherStrontiumAdsorption behavior
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