ACS Applied Polymer Materials, Год журнала: 2019, Номер 1(8), С. 2230 - 2239

Опубликована: Июль 11, 2019

Produced water (PW) constitutes a massive environmental issue due to its huge global production as well complexity and toxicity. Membrane technology could, however, convert this complex waste stream into an important source of for reuse, but new more efficient membranes are required. In particular, in the last few years, polyelectrolyte multilayers (PEMs) established themselves very powerful method prepare hollow fiber-based nanofiltration (NF) membranes, membrane type geometry would be ideal PW treatment. Unfortunately, presence surfactants can affect stability multilayers. work, we investigate toward different types surfactant, initially on model surfaces. We find that chemically stable such poly(diallyldimethylammonium chloride) (PDADMAC)/poly(sodium 4-styrenesulfonate) (PSS), based only electrostatic interactions, substantially desorbed by charged surfactants. For poly(allylamine hydrochloride) (PAH)/PSS multilayers, demonstrate chemical cross-linking glutaraldehyde leads surfactant layers. These PEM coatings also applied fiber support create NF dedicated Increased time selective separation performance. newly developed were subsequently studied treatment synthetic PW, consisting freshly prepared oil-in-water emulsions stabilized hexade-cyltrimethylammonium bromide (CTAB) sodium dodecyl sulfate (SDS) mixture ions. both produced water, show excellent oil removal (∼100%) organics (TOC reduced up ∼97%) good divalent ion retentions (∼75% Ca2+ ∼80% SO42–). Moreover, observe high flux recovery (100% CTAB 80% SDS) especially emulsion low degree fouling. PEM-based thus allow simultaneous deoiling small organic molecules, particles, ions single step process while demonstrating cleanability.

Язык: Английский