Abstract A novel lithium ion imprinted membrane (Li+-IIM) was synthesized by unipolar pulsed electropolymerization, using lithium ion as template ion, 2-hydroxymethyl-12-crown-4 ether as capture agent, pyrrole as conductive agent and crosslinking agent. The morphology and structure of the products were characterized by using field emission scanning electron microscopy and Fourier transformation infrared spectroscopy. The adsorption behaviors were detected by inductively coupled plasma-optical emission spectrometry. At pH = 1.0, the maximum adsorption capacity of Li+-IIM towards lithium ion reached 16.40 mg g−1 in 40 mg L−1 Li+ solution, within 80 min. The resulting Li+-IIM exhibited excellent selectivity for Li+ because the selectivity coefficients of Li+ with respect to Na+, K+, Mg2+, Al3+ and Fe3+ are 4.20, 4.11, 4.13, 4.30 and 4.28, respectively. After five adsorption-desorption cycles, the adsorption capacity of Li+-IIM still maintained 95.88%, indicating that the obtained imprinted membrane has excellent regeneration ability.

中文翻译：

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使用电化学印迹膜从酸性溶液中提取锂离子

摘要 以锂离子为模板离子，2-羟甲基-12-冠-4醚为捕获剂，吡咯为导电剂和交联剂，采用单极脉冲电聚合法合成了新型锂离子印迹膜（Li+-IIM）。采用场发射扫描电子显微镜和傅里叶变换红外光谱对产物的形貌和结构进行表征。吸附行为通过电感耦合等离子体-光发射光谱法检测。在 pH = 1.0 时，Li+-IIM 对锂离子的最大吸附容量在 80 分钟内在 40 mg L-1 Li+ 溶液中达到 16.40 mg g-1。由于 Li+ 对 Na+、K+、Mg2+、Al3+ 和 Fe3+ 的选择性系数为 4.20、4.11、4.13、4.30 和 4.28，所得的 Li+-IIM 对 Li+ 表现出优异的选择性，分别。经过5次吸附-解吸循环后，Li+-IIM的吸附容量仍保持在95.88%，表明所得印迹膜具有良好的再生能力。