TITLE

Concentrate of surfactant-based draw solutions in forward osmosis by ultrafiltration and nanofiltration

AUTHOR(S)
Hau Thi Nguyen; Nguyen Cong Nguyen; Shiao-Shing Chen; Shu-Ying Wu
PUB. DATE
September 2015
SOURCE
Water Science & Technology: Water Supply;2015, Vol. 15 Issue 5, p1133
SOURCE TYPE
Periodical
DOC. TYPE
Article
ABSTRACT
The exploration of coupling surfactants with highly charged phosphate as novel draw solutions for forward osmosis (FO) to minimize salt leakage and enhance draw solute recovery at low energy is presented for the first time. In this work, anionic (sodium dodecyl sulfate (SDS)), cationic (cetyltrimethylammonium bromide) and non-ionic (polyethylene glycol tert-octylphenyl ether, TX-100) surfactants were used to couple with Na3PO4 for enlarging draw solution particle size that could improve the solute retention. Three kinds of nanofiltration (NF) membranes (HL, DL and TS80 with molecular weight cutoff (MWCO) of 100-500) and three kinds of ultrafiltration (UF) membranes (GE, GH and GK with MWCO of 1,000-3,000) were used to evaluate the draw solution recovery. The formed second layer, micelles, MWCO and charged valent were determined to be the dominant mechanisms for diluted draw solution recovery. The results show that coupling non-ionic surfactant with 0.02 M Na3PO4 can be regenerated with recoveries as high as 60% and 96% when using UF-GE and NF-TS80, respectively. The overall performance demonstrates that coupling surfactant with highly charged phosphate is promising as draw solutes for application to FO.
ACCESSION #
110097305

 

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics