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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of Ion-Imprinting Chitosan/PVA Crosslinked Membrane for Selective Removal of Ag(I)
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Synthesis of Ion-Imprinting Chitosan/PVA Crosslinked Membrane for Selective Removal of Ag(I)

机译：离子印迹壳聚糖/ PVA交联膜的选择性去除Ag（I）的合成

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摘要

A novel ion-imprinted membranes were synthesized for selective removal and preconentration for Ag(I) ions from aqueous solutions. The membranes were obtained via crosslinking of chitosan (CS), PVA, and blend chitosan/PVA using glutaraldehyde (GA) as crosslinker. The FTIR spectra were used to confirm the membrane formation. Comparing with the nonimprinted membranes, Ag(I)-imprinted CS and CS/PVA has higher removal capacity and selectivity for Ag+ ions. An enhancement in the Ag+ removal capacity by similar to 20% (from 77.8 to 94.4 mg g(-1)) and similar to 50% (from 83.9 to 125 mg g(-1)) was found in the Ag(l)-imprinted CS and Ag(l)-imprinted CS/PVA membranes, respectively, when compared with the nonimprinted membranes. Removal equilibra was achieved in about 40 min for the non- and ion-imprinted CS/PVA. The pH and temperature significantly affected the removal capacity of ion-imprinted membrane. The relative selectivity coefficient values of Ag+/Cu2+ and Ag+/Ni2+ are 9 and 10.7 for ion-imprinted CS membrane and 11.1 and 15 for ion-imprinted CS/PVA membrane when compared with nonimprinted membranes. The imprinted membranes can be easily regenerated by 0.01M EDTA and therefore can be reused at least five times with only 15% loss of removal capacity.
机译：合成了一种新型的离子印迹膜，用于从水溶液中选择性去除和预浓缩Ag（I）离子。通过壳聚糖（CS），PVA的交联以及使用戊二醛（GA）作为交联剂的壳聚糖/ PVA的共混物来获得膜。 FTIR光谱用于确认膜的形成。与非印迹膜相比，Ag（I）印迹的CS和CS / PVA具有更高的去除能力和对Ag +离子的选择性。发现在Ag（l）-中，Ag +去除能力提高了约20％（从77.8到94.4 mg g（-1））和类似的50％（从83.9到125 mg g（-1））。与非压印膜相比，压印CS和Ag（l）压印的CS / PVA膜分别。对于非和离子印迹的CS / PVA，在约40分钟内即可达到去除平衡。 pH和温度显着影响离子印迹膜的去除能力。与非压印膜相比，离子压印CS膜的Ag + / Cu2 +和Ag + / Ni2 +的相对选择性系数值为9和10.7，而离子压印CS / PVA膜的相对选择性系数为11.1和15。印迹膜可以轻松地通过0.01M EDTA再生，因此可以重复使用至少5次，去除能力损失仅为15％。

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