Open AccessThe Feasibility of Emulsion Liquid Membrane for the Extraction of Organic Acids from Wastewater
Author(s) -
Suheila Abd Alreda Akkar,
Sawsan A. M. Mohammed
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1076/1/012021
Subject(s) - benzoic acid , phenol , chemistry , acetic acid , membrane , aqueous two phase system , extraction (chemistry) , chromatography , emulsion , organic acid , aqueous solution , wastewater , stripping (fiber) , organic chemistry , materials science , environmental engineering , biochemistry , engineering , composite material
The separation of hazardous organic acid pollutants such as phenol and carboxylic acids from aqueous waste streams released from industries is important and essential for environmental pollution. Acetic acid, benzoic acid, and phenol individually extracted from their aqueous solutions using emulsion liquid membranes prepared with kerosene as a membrane phase, Span 80 as a surfactant and NaOH as a stripping agent in the inner phase of W/O emulsions. Experiments have been performed to study the effect of volume ratio of membrane phase to internal phase (V M /V I ), stripping phase concentration in the internal phase, agitation speed of feed solution, and volume ratio of emulsion phase to feed phase (V E /V F ) on the organic acid extraction rates. More than 98% of benzoic acid and phenol can be extracted in less than 5 minutes, acetic can also be extracted but at much slower rates. Comparison of the extraction rates of organic acid indicates that benzoic acid and phenol are extracted more rapidly than that of acetic acid because the distribution coefficient (m) of benzoic acid and phenol is much larger than that of acetic acid due to their ability to dissolve in the membrane phase. The effective diffusivities indicate that the mobility of these compounds in the membrane phase obeys the following order: benzoic acid > acetic acid > phenol.