Dead‐End Liposomal Electro‐Filtration: Phenol Removal by Dioctadecyl Dimethyl Ammonium Chloride as a Case Study

Abstract

Among the important efforts that have been made for the removal of trace organic molecules, sorption by micelles and subsequent membrane filtration is a promising method which, however, still suffers from a number of disadvantages such as low efficiency and high energy consumption. In this article, we present the results of the sorption of phenol (as an important trace organic pollutant in industrial wastewater) to dioctadecyl dimethyl ammonium chloride (DODAC) liposomes, as well as the filtration properties of the resulting dispersion. Whereas the sorption of phenol by a 0.5 wt % DODAC dispersion at neutral pH and ambient temperature was only 26-35 %, it increased to above 95 % at pH 11. Applying an electric field during the filtration process considerably improved both the filtrate flow rate and the retention. An electric field of 5 V/cm increased the filtrate flow rate at 200 kPa 30-fold.

NMR Investigation of Exchange Dynamics and Binding of Phenol and Phenolate in DODAC Vesicular Dispersions

“…In a previous publication, it was noticed that basic pH conditions lead to a significant improvement of the phenol sorption in cationic CTAB micellar solutions, especially when the phenol p K a was reached and surpassed. Similar findings were also reported by Hakimhasemi et al, studying phenol removal by means of electro-filtration with DODAC dispersions.…”

Influence of Pt, Ag and Au electrodes on Cr (III) electrofiltration with current density

“…The application of EF to wastewater treatment has been putted into practice to separate different types of pollutants: phenol (Hakimhashem et al, 2010), calcium salts (Quin et al, 2011), organic matter (Tsai et al, 2011), UV filters (benzophenone-3) (Chen & Deng, 2013), pharmaceutical substances (Bakr & Rahaman, 2016) humic substances and metal ions (Wei et al, 2015).…”