Table of Contents
Appl. Sci., Volume 7, Issue 2 (February 2017)
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Cover Story (view full-size image) Membrane distillation (MD) recently shifted from seawater desalination to industrial applications [...] Read more. Membrane distillation (MD) recently shifted from seawater desalination to industrial applications out of the scope of reverse osmosis. In many of these applications, surfactants or oil traces are present in the feed stream, increasing the risk for membrane wetting. Synthetic NaCl solutions mixed with sodium dodecyl sulfate (SDS) and hexadecane/SDS emulsions represent these challenging waste streams. The wetting propensity can be predicted using surface tension, contact angle and liquid entry pressure measurements. Lab scale MD experiments confirmed the validity of the predicted wetting risk and the improved performance of oleophobic membranes compared to standard PTFE membranes. View the paper