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首页> 外文期刊>Separation and Purification Technology >Highly efficient and selective transport of methylene blue through a bulk liquid membrane containing Cyanex 301 as carrier
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Highly efficient and selective transport of methylene blue through a bulk liquid membrane containing Cyanex 301 as carrier

机译：通过含有Cyanex 301作为载体的块状液膜高效高效地选择转移亚甲基蓝

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摘要

A bulk liquid membrane (BLM) system contained bis(2,4,4-trimethyl pentyl) dithiophosphinic acid (cyanex 301) as carrier and Triton-X-114 as nonionic surfactant was utilized for transport of methylene blue (MB). Cyanex 301 was an efficient and selective carrier for the uphill transport of MB through chloroform and n-hexane in the bulk liquid membrane. Maximum extraction (85%) was observed at 0.0002 M concentration of Cyanex 301 in the membrane phase and 0.2 M concentration of H2SO4 in the receiving phase after 7 h. The selectivity and efficiency of MB transport from aqueous solutions contained mixtures of methylene blue (cationic dye) and methyl orange (anionic dye) were studied. The effect of parameters influencing the transport of MB such as pH and concentration of dye in the feed solution, carrier and surfactant concentrations in the membrane, type of organic solvent, nature and composition of the receiving phase, stirring speed and transport time on kinetic parameters of MB transport were elucidated for the interface assuming two consecutive, irreversible first-order reactions. The analysis of the accumulation of MB in the liquid membrane phase and the rate-controlling step under different experimental conditions were discussed. Finally, the proposed liquid membrane was successfully applied for MB separation from waste water.
机译：包含双（2,4,4-三甲基戊基）二硫代次膦酸（cyanex 301）作为载体和Triton-X-114作为非离子表面活性剂的体液膜（BLM）系统用于亚甲基蓝（MB）的运输。 Cyanex 301是一种高效的选择性载体，用于MB向上通过本体液体膜中的氯仿和正己烷进行向上运输。在7 h后，在膜相中浓度为0.0002 M的Cyanex 301和在接收相中浓度为0.2 M的H2SO4，观察到最大萃取率（85％）。研究了从含有亚甲基蓝（阳离子染料）和甲基橙（阴离子染料）的混合物的水溶液中MB的选择性和效率。影响MB传输的参数如pH和进料溶液中染料的浓度，膜中载体和表面活性剂的浓度，有机溶剂的类型，接收相的性质和组成，搅拌速度和传输时间对动力学参数的影响假定两个连续的，不可逆的一阶反应，说明了该界面的MB传输量。讨论了在不同实验条件下MB在液膜相中的积累和速率控制步骤。最后，所提出的液膜成功地用于废水中的MB分离。

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