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Removal of Ferriccyanide using Micellar Enhanced Ultrafiltration (MEUF)

机译：使用胶束增强超滤（MEUF）去除铁氰化物

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摘要

Cyanides are used in a number of chemical synthesis and metallurgical processes (as simple salts or cyanide complexes). As a class, cyanides are highly toxic and must be destroyed or removed from wastewaters prior to being discharged. Micellar-enhanced ultrafiltration (MEUF) involves the addition of a surfactant above the critical micellar concentration in order to entrap small solutes in solution. The increased hydrodynamic size of the solutes enables their rejection by polymeric ultrafiltration membranes. Solute rejection and permeate flux depend on solute and membrane characteristics. MEUF-based separation of Fe(CN)_6~(3-) using regenerated cellular acetate membranes was studied in order to assess the potential of MEUF for the remediation of wastewater polluted with ferriccyanide. The solute rejection coefficient of ferriccyanide increased from 59 % to 81% and to 99.9% as the molar ratio of cetylpyridinium chloride to ferriccyanide increased from 1 to 2, and 2 to 3, respectively, at a ferriccyanide concentration of 1 mM. The rejection coefficient of ferriccyanide increased from 78 % to 99.9 % as the molar ratio increased from 1 to 3 at a ferriccyanide concentration of 5 mM. The permeation flux and permeation of surfactant molecules across the membrane were evaluated in relation to the experimental conditions.
机译：氰化物用于许多化学合成和冶金过程（作为简单的盐或氰化物络合物）。作为一类，氰化物具有剧毒，必须在排放之前将其破坏或从废水中除去。胶束增强超滤（MEUF）涉及在临界胶束浓度以上添加表面活性剂，以将小溶质截留在溶液中。溶质的增大的流体动力学尺寸使其能够被聚合物超滤膜截留。溶质截留率和渗透通量取决于溶质和膜的特性。为了评估MEUF修复铁氰化物污染废水的潜力，研究了使用再生的醋酸纤维素膜基于MEUF的Fe（CN）_6〜（3-）分离方法。当氰化铁浓度为1 mM时，氯化十六烷基吡啶鎓与氰化铁的摩尔比分别从1增加到2和2至3，铁氰化物的溶质排斥系数从59％增加到81％和99.9％。当氰化铁浓度为5 mM时，摩尔比从1增加到3，铁氰化物的排斥系数从78％增加到99.9％。相对于实验条件，评估了穿过膜的渗透通量和表面活性剂分子的渗透。

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