Solvent extraction behavior of p-tert-butylsulfonylcalix[4]arene (SC4A) towards Cs(I) and Sr(II) from aqueous solutions was studied with respect to the effects of contact time, pH value, SC4A concentration, nitrate concentration and temperature. The extraction of Na(I), K(I), Mg(II), Ca(II), Ba(II), Pb(II), Cd(II), Zn(II), Co(II), Ni(II), and Ce(III) was also investigated. It was demonstrated that SC4A can sequester both Cs(I) and Sr(II) efficiently from aqueous solutions. According to extraction experiments, Fourier transform infrared and 1H nuclear magnetic resonance analysis of the metal-SC4A complex, authors proposed a possible mechanism involving formation of an adjustable cavity from two SC4A molecules for the complexation of one alkaline earth metal ion, and the size of the adjustable cavity changes depending on the ion within an appropriate range. Irradiation stability of the SC4A was tested, the results indicated that the main structure of SC4A remained unchanged when the temperature was below 400 °C, and SC4A maintains excellent extraction ability for Cs(I) and Sr(II) under an irradiation dose of 1.0 × 104~1.1 × 106 Gy.

中文翻译：

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对铯(I)和锶(II)具有辐照稳定性的对叔丁基磺酰基杯[4]芳烃的萃取性能

研究了对叔丁基磺酰基杯[4]芳烃 (SC4A) 从水溶液中对 Cs(I) 和 Sr(II) 的溶剂萃取行为，涉及接触时间、pH 值、SC4A 浓度、硝酸盐浓度和温度的影响. Na(I)、K(I)、Mg(II)、Ca(II)、Ba(II)、Pb(II)、Cd(II)、Zn(II)、Co(II)、Ni( II) 和 Ce(III) 也进行了研究。结果表明，SC4A 可以有效地从水溶液中螯合 Cs(I) 和 Sr(II)。根据金属-SC4A 络合物的提取实验、傅里叶变换红外和 1H 核磁共振分析，作者提出了一种可能的机制，涉及由两个 SC4A 分子形成一个可调腔，用于络合一个碱土金属离子，可调腔的大小根据离子在适当的范围内变化。对SC4A的辐照稳定性进行了测试，结果表明SC4A的主要结构在温度低于400℃时保持不变，在1.0的辐照剂量下SC4A对Cs(I)和Sr(II)保持优异的提取能力× 104~1.1 × 106 Gy。