Abstract
Micellar-enhanced ultrafiltration (MEUF) can be applied to removing soluble organics from contaminated waters. MEUF involves the addition of a surfactant to the contaminated water at a concentration that exceeds its critical micelle concentration (CMC). Consequently, micelles form and dissolve organic contaminants in their hydrocarbon tails. An ultrafiltration membrane with pores smaller than the micelle size is, then, used to separate the contaminant-containing micelles from the water. Traditional MEUF, however, is susceptible to membrane plugging and back contamination, especially at high surfactant dosage. This chapter sheds some light on amphiphilic naphthenic acid co-contaminants and their role in decreasing the dosage of cetylpyridinium chloride (CPC) surfactant necessary to achieve appreciable removal of the organic contaminants.
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