This study investigates the interfacial stability of emulsion liquid membrane (ELM) for phenols removal through the introduction of blended surfactant in the formulation of liquid membranes. The stability was studied in terms of emulsion breakage time and droplets size distribution. The components used in ELM were a mixture of palm oil and kerosene (7:3) as a diluent, sorbitan monooleate (Span 80) and polyoxyethylene sorbitan monooleate (Tween 80) as a surfactants, and sodium hydroxide as a stripping agent. Parameters such as hydrophilic-lipophilic (HLB) value, mixed surfactant concentration, homogenizer speed, emulsification time and organic-to-internal (O/I) ratio were evaluated. Results show that stable emulsion was formed at HLB 5, 3 % (w / v) of blended surfactant, 8000 rpm of homogenizer speed, 3 min of emulsification time and 3:1 O/I ratio. 83.4 % of phenol were extracted under these conditions without any emulsion breakage or swelling. Thus, Span 80 and Tween 80 mixture has high potential as surfactant and is capable to increase the stability of emulsion.

本研究通过在液膜配方中引入混合表面活性剂，研究了用于除去苯酚的乳液液膜（ELM）的界面稳定性。根据乳液破裂时间和液滴尺寸分布研究了稳定性。ELM中使用的组分是：棕榈油和煤油（7：3）的混合物作为稀释剂，脱水山梨醇单油酸酯（Span 80）和聚氧乙烯脱水山梨糖醇单油酸酯（Tween 80）作为表面活性剂，以及氢氧化钠作为汽提剂。评价诸如亲水-亲脂（HLB）值，混合的表面活性剂浓度，均化器速度，乳化时间和有机与内部（O / I）之比的参数。结果表明，在HLB 5、3％（w / v）的混合表面活性剂，8000 rpm的均质器速度，3分钟的乳化时间和3：1 O / I比的条件下，形成了稳定的乳液。在这些条件下提取了83.4％的苯酚，没有任何乳液破损或溶胀。因此，Span 80和Tween 80混合物具有作为表面活性剂的高潜力，并能够提高乳液的稳定性。