Removal of phenol and substituted phenols by newly ...
The membrane phase consisted mainly of Soltrol 220 (Chevron Philips Chemical, Spring, TX). A non-ionic surfactant, Span 80 (Emulsion Engineering, Sanford, FL), was used as an emulsifier and polyisobutylene (PIB) EL-100 with average molecular weight of 1,250,000 (ExxonMobil Chemical, Houston, TX) as a polymeric additive.