Ait Khaldoun Ibrahim, Mitiche Lynda, Sahmoune Amar, Fontàs Clàudia
Department of Chemistry, University of Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Spain.
Equipe de Recherche Matériaux et Procédés pour l'Environnement, Université Mouloud Mammeri Tizi-Ouzou, Tizi-Ouzou 15000, Algeria.
Membranes (Basel). 2018 Aug 10;8(3):61. doi: 10.3390/membranes8030061.
A novel and simple device that includes a polymer inclusion membrane (PIM) has been prepared and tested for the first time to detect low concentration levels of cadmium in seawater. The ionic liquid trihexyl (tetradecyl) phosphonium chloride (THTDPCl) has been shown to be an effective extractant when incorporated in a PIM that uses cellulose triacetate (CTA) as a polymer. However, it has been reported that the use of a plasticizer is mandatory to ensure an effective transport, which uses both ultrapure water and a nitric acid solution as a stripping phase. A special device incorporating a PIM made of 50% CTA, 40% nitrophenyl octyl ether (as a plasticizer), and 10% THTDPCl, effectively allows the quantitative transport and preconcentration of 10 µg L Cd from seawater samples to a stripping phase consisting of 0.5 M HNO₃ solution. This study shows that the efficiency of the PIM system is not affected by high salinity nor the presence of large amounts of other ions, and can thus facilitate Cd monitoring in seawater samples.
一种包含聚合物包容膜（PIM）的新型简易装置首次被制备并测试，用于检测海水中低浓度水平的镉。离子液体三己基（十四烷基）氯化鏻（THTDPCl）已被证明，当它被掺入以三醋酸纤维素（CTA）为聚合物的PIM中时，是一种有效的萃取剂。然而，据报道，必须使用增塑剂以确保有效传输，该传输过程使用超纯水和硝酸溶液作为反萃相。一种特殊装置包含由50% CTA、40% 硝基苯基辛基醚（作为增塑剂）和10% THTDPCl制成的PIM，能有效地将海水样品中10 µg L的镉定量传输并预富集到由0.5 M HNO₃溶液组成的反萃相中。这项研究表明，PIM系统的效率不受高盐度和大量其他离子存在的影响，因此有助于对海水样品中的镉进行监测。
