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首页> 外文期刊>Separation and Purification Technology >Efficient hollow fiber supported liquid membrane system for the removal and preconcentration of Cr(VI) at trace levels
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Efficient hollow fiber supported liquid membrane system for the removal and preconcentration of Cr(VI) at trace levels

机译：高效中空纤维支撑的液膜系统，用于痕量水平的Cr（VI）的去除和预富集

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A hollow fiber supported liquid membrane (HFSLM) system for the removal and preconcentration of Cr(VI) has been developed and characterized using Aliquat 336 as carrier. The influence of the chemical composition on the efficiency of the membrane system has been investigated, such as the organic solvent and the stripping composition. Among the stripping reagents tested, a solution of 0.5 M HNO3 was found to be the most effective to strip Cr(VI) from the loaded organic phase. Moreover, physical parameters such as the stability of the membrane and the operation mode of the module were also evaluated. The results demonstrated the effectiveness of the HFSLM system during 8 non-stop days' operation. This membrane-based separation system has effectively been used to remove Cr(VI) from different aqueous samples, such as industrial waters and spiked natural waters at μgL~(-1) levels. Moreover, the system has allowed both the separation and enrichment of the metal and, thus, facilitating the detection of chromate contained in aqueous samples and reducing the volume of polluted water to be treated.
机译：已开发出一种中空纤维支撑的液膜（HFSLM）系统，用于去除和预浓缩Cr（VI），并使用Aliquat 336作为载体进行了表征。已经研究了化学组成对膜系统效率的影响，例如有机溶剂和汽提组成。在测试的汽提试剂中，发现0.5 M HNO3溶液是最有效的从负载的有机相汽提Cr（VI）的溶液。此外，还评估了诸如膜的稳定性和模块的操作模式之类的物理参数。结果证明了HFSLM系统在连续8天运行中的有效性。这种基于膜的分离系统已被有效地用于从不同的含水样品中去除Cr（VI），例如工业水和浓度为μgL〜（-1）的加标天然水。而且，该系统允许金属的分离和富集，因此，有助于检测含水样品中所含的铬酸盐，并减少了要处理的污水量。

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