Removal of Industrial Cutting Oil from Oil Emulsions by Polymeric Ultra- and Microfiltration Membranes

The utilization of micro- and ultrafiltration with polymeric membranes for treatment of industrial cutting oil emulsion was investigated. The performance of 14 different membranes with pore sizes in the range of 1−800 nm, representing 8 different materials and varying hydrophobicity, was determined...

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Bibliographic Details
Published in:Environmental science & technology 2004-09, Vol.38 (18), p.4878-4883
Main Authors: Janknecht, Peter, Lopes, Ana D, Mendes, Adélio M
Format: Article
Language:English
Subjects:
Applied sciences
Contact angle
Emulsion polymerization
Emulsions - analysis
Emulsions - chemistry
Exact sciences and technology
Hot Temperature
Hydrophobic and Hydrophilic Interactions
Industrial Oils - analysis
Industrial wastewaters
Membranes
Membranes, Artificial
Oil
Permeability
Pollution
Polymers - chemistry
Pore size
Porosity
Ultrafiltration - instrumentation
Ultrafiltration - methods
Wastewaters
Water treatment and pollution
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Summary:The utilization of micro- and ultrafiltration with polymeric membranes for treatment of industrial cutting oil emulsion was investigated. The performance of 14 different membranes with pore sizes in the range of 1−800 nm, representing 8 different materials and varying hydrophobicity, was determined experimentally. Membrane permeances between 1.6 and 939 L m-2 h-1 bar-1 have been observed for the different samples as well as oil rejections between 3.42% and 99.99%. Membrane pore size and contact angle showed little influence on both values, while an interesting correlation is displayed to the individual membranes' capillary pressures. A possible explanation for this phenomenon is suggested based on the formation of oil films on the membrane surface. From the investigated membranes, the best-suited one for cutting oil treatment was selected and subjected to further experiments. The effect of process temperatures between 22 and 43 °C and of feed oil concentrations between 0 and 20 vol % on the removal performance was determined. The results correspond to the explanation suggested previously.
ISSN:0013-936X
1520-5851
DOI:10.1021/es0348243