Easy removing of phenol from wastewater using vegetable oil-based organic solvent in emulsion liquid membrane process

• Published in: Chinese journal of chemical engineering 2017, Vol.25 (1), p.45-52
• Main Authors: Othman, Norasikin, Noah, Norul Fatiha Mohamed, Shu, Lim Yin, Ooi, Zing-Yi, Jusoh, Norela, Idroas, Mariani, Goto, Masahiro
• Format: Article
• Language: English
• Subjects: Liquid membrane; Phenol removal; Vegetable palm oil-based; Wastewater; 乳化液; 有机溶剂; 模拟废水; 油基; 稳定性参数; 膜法处理; 苯酚溶液; 酚类化合物
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/j.cjche.2016.06.002

Phenol is considered as pollutant due to its toxicity and carcinogenic effect.Thus,variety of innovative methods for separation and recovery of phenolic compounds is developed in order to remove the unwanted phenol from wastewater and obtain valuable phenolic compound.One of potential method is extraction using green based liquid organic solvent.Therefore,the feasibility of using palm oil was investigated.In this research,palm oil based organic phase was used as diluents to treat a simulated wastewater containing 300×10^-6 of phenol solution using emulsion liquid membrane process（ELM）.The stability of water-in-oil（W/O） emulsion on diluent composition and the parameters affecting the phenol removal efficiency and stability of the emulsion;such as emulsification speed,emulsification time,agitation speed,surfactant concentration,pH of external phase,contact time,stripping agent concentration and treat ratio were carried out.The results of ELM study showed that at ratio7 to 3 of palm oil to kerosene,5 min and 1300 r·min^-1 of emulsification process the stabile primary emulsion were formed.Also,no carrier is needed to facilitate the phenol extraction.In experimental conditions of500 r·min^-1 of agitation speed,3%Span 80,pH 8 of external phase,5 min of contact time,0.1 mol·L^-1 NaOH as stripping agent and 1：10 of treat ratio,the ELM process was very promising for removing the phenol from the wastewater.The extraction performance at about 83%of phenol was removed for simulated wastewater and an enrichment of phenol in recovery phase as phenolate compound was around 11 times.