Pont Núria, Salvadó Victòria, Fontàs Clàudia
Department of Chemistry, University of Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Spain.
Membranes (Basel). 2018 Apr 23;8(2):21. doi: 10.3390/membranes8020021.
A supported liquid membrane is developed for the separation of Cd from either high in salinity or acidity aqueous media. The membrane consisted of a durapore (polyvinylidene difluoride) polymeric support impregnated with a 0.5 M Aliquat 336 solution in decaline. The effect of carrier concentration, organic solvent and feed and receiving solutions on the metal permeability is studied. This system allows the effective transport of trace levels of Cd through the formation of CdCl₄, which is the predominant species responsible for the extraction process, in both NaCl and HCl solutions. The supported liquid membrane system in a hollow fibre configuration allows the enrichment and separation of trace levels of Cd from spiked seawater samples, facilitating the analytical determination of this toxic metal.
开发了一种支撑液膜，用于从高盐度或高酸度的水性介质中分离镉。该膜由浸渍有0.5M Aliquat 336（三辛基甲基氯化铵）在十氢化萘中的溶液的聚偏氟乙烯（Durapore）聚合物载体组成。研究了载体浓度、有机溶剂以及进料和接收溶液对金属渗透性的影响。该系统通过形成CdCl₄实现痕量镉的有效传输，在NaCl和HCl溶液中，CdCl₄是负责萃取过程的主要物种。中空纤维构型的支撑液膜系统能够从加标海水样品中富集和分离痕量镉，便于对这种有毒金属进行分析测定。
