Abstract

The current research work elucidates an experimental study on the stability performance of a green emulsion liquid membrane (GELM). A GELM based on rice bran oil (RBO) is a new subset of a previously existing organic solvent-based emulsion liquid membrane (ELM). These organic solvents are responsible for several environmental as well as for economic problems. A GELM is an economical and environmentally friendly green separation technique. The GELM was formulated using a green solvent (RBO), emulsifying agent (Span 80), and stripping aqueous phase agent (NaOH). Emulsification speed of 2100 (r.min⁻¹), emulsification time of 20 (min), 2% (v/v) Span 80 concentration, 0.25 [M] NaOH concentration, 1 : 3.5 (v/v) treat ratio, 0.4 (v/v) phase ratio, agitation speed of 400 (r.min⁻¹), and agitation time of 20 (min) have been obtained as the optimum values of process parameters. The highest achievable dynamic stability was found to be 150 ± 2 min along with the negligible emulsion swelling/breakage (%). Moreover, the membrane breakage (%) has been obtained <1 ± 0.05% which was in trade-off with the emulsion swelling (%) under these obtained optimum process parameters. Thus, this present investigation on the stability performance of GELM provides the new insights regarding the role of various process parameters which will be further helpful during the extraction of low concentrated solutes through GELM based separation processes.

中文翻译：

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操作工艺参数对米糠油基绿色乳液液膜稳定性的影响

摘要

目前的研究工作阐明了绿色乳液液膜（GELM）稳定性性能的实验研究。基于米糠油 (RBO) 的 GELM 是先前存在的基于有机溶剂的乳液液膜 (ELM) 的新子集。这些有机溶剂是造成若干环境和经济问题的原因。GELM 是一种经济环保的绿色分离技术。GELM 使用绿色溶剂 (RBO)、乳化剂 (Span 80) 和汽提水相剂 (NaOH) 配制而成。乳化速度 2100 (r.min ^-1 )，乳化时间 20 (min)，2% (v/v) Span 80 浓度，0.25 [M] NaOH 浓度，1 : 3.5 (v/v) 处理比，0.4 (v/v) 相比，搅拌速度 400 (r.min ^-1)，搅拌时间为 20 (min) 作为工艺参数的最佳值。发现可实现的最高动态稳定性为 150 ± 2 分钟，同时乳液溶胀/破裂 (%) 可忽略不计。此外，在这些获得的最佳工艺参数下，膜破裂 (%) 已获得 <1 ± 0.05%，这是与乳液溶胀 (%) 的权衡。因此，目前对 GELM 稳定性性能的研究提供了关于各种工艺参数作用的新见解，这将进一步有助于通过基于 GELM 的分离工艺提取低浓度溶质。