Study of Micellar-Enhanced Ultrafiltration. Progress report, March 1, 1984-February 28, 1985. [4-tertbutylphenol]

Technical Report · Mon Oct 01 04:00:00 EDT 1984

OSTI ID:5994114

Scamehorn, J F; Christian, S D

Micellar Enhanced Ultrafiltration (MEUF) has been shown to be an extremely effective method of removing dissolved organics from aqueous streams. In a model system with 4-tert-butylphenol as the dissolved organic, experimental rejections as high as 99.7% were observed with a permeate/feed ratio of 89% and good fluxes. Therefore, extremely low organic concentrations in the permeate are achievable with a small concentrate stream containing the dissolved organic in high concentrations. The nontoxic surfactant concentration in the permeate was observed to be 1 mM, a very low level. It is important to be able to predict the permeate purity in this process. In order to do that, comparison of the permeate composition to that expected under equilibrium conditions is useful. Very accurate solubilization (equilibrium) data for several solute-surfactant systems have been obtained using a vapor pressure technique for comparison to (future) MEUF data. However, organic solutes with low vapor pressures cannot be studied by using this method. Therefore, a new equilibrium dialysis method has been developed to measure solubilizations for these compounds. This will permit interfacing between MEUF experiments and solubilization measurements over a wide range of compounds. A study has been done on the advantages and disadvantages of using various classes of surfactants in MEUF. Considering solubilization capacities, micelle size, CMC, phase boundaries, and concentration polarization characteristics, cationic surfactants are considered the best candidate for most MEUF applications. 10 referenes, 17 figures.

• Research Organization: Oklahoma Univ., Norman (USA)
• DOE Contract Number: AS05-84ER13175
• OSTI ID: 5994114
• Report Number(s): DOE/ER/13175-1; ON: DE85005585
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
AQUEOUS SOLUTIONS
AROMATICS
COMPARATIVE EVALUATIONS
DATA
DIALYSIS
DISPERSIONS
EXPERIMENTAL DATA
FILTRATION
HYDROXY COMPOUNDS
INFORMATION
MICELLAR SYSTEMS
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
PHENOLS
REAGENTS
SEPARATION PROCESSES
SOLUTES
SOLUTIONS
SURFACTANTS
ULTRAFILTRATION