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Highly permeable double-skinned forward osmosis membranes for anti-fouling in the emulsified oil-water separation process.
Environ Sci Technol 2014; 48(8):4537-45ES

Abstract

Forward osmosis (FO) has attracted wide attention in recent years. However, the FO performance may be restricted due to internal concentration polarization (ICP) and fast fouling propensity that occurs in the membrane sublayer. Particularly, these problems significantly affect the membrane performance when treating highly contaminated oily wastewater. Recently, double-skinned flat sheet cellulose acetate (CA) membranes consisting of two selective skins via the phase inversion method have demonstrated less ICP and fouling propensity over typical single-skinned membranes. However, these membranes exhibit low water fluxes of <12 LMH under 2 M NaCl draw solution. Therefore, a novel double-skinned FO membrane with a high water flux has been aimed for in this study for emulsified oil-water treatment. The double-skinned FO membrane comprises a fully porous sublayer sandwiched between (i) a truly dense skin for salt rejection and (ii) a fairly loose dense skin for emulsified oil particle rejection. The former dense skin is a polyamide synthesized via interfacial polymerization, while the latter one is a self-assembled sulfonated pentablock copolymer (Nexar copolymer) layer. The resultant double-skinned membrane exhibits a high water flux of 17.2 LMH and a low reverse salt transport of 4.85 gMH using 0.5 M NaCl as the draw solution and DI water as the feed. The double-skinned membrane outperforms the single-skinned membrane with much lower fouling propensity for emulsified oil-water separation.

Authors+Show Affiliations

Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, Singapore 117585, Singapore.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24621207

Citation

Duong, Phuoc H H., et al. "Highly Permeable Double-skinned Forward Osmosis Membranes for Anti-fouling in the Emulsified Oil-water Separation Process." Environmental Science & Technology, vol. 48, no. 8, 2014, pp. 4537-45.
Duong PH, Chung TS, Wei S, et al. Highly permeable double-skinned forward osmosis membranes for anti-fouling in the emulsified oil-water separation process. Environ Sci Technol. 2014;48(8):4537-45.
Duong, P. H., Chung, T. S., Wei, S., & Irish, L. (2014). Highly permeable double-skinned forward osmosis membranes for anti-fouling in the emulsified oil-water separation process. Environmental Science & Technology, 48(8), pp. 4537-45. doi:10.1021/es405644u.
Duong PH, et al. Highly Permeable Double-skinned Forward Osmosis Membranes for Anti-fouling in the Emulsified Oil-water Separation Process. Environ Sci Technol. 2014 Apr 15;48(8):4537-45. PubMed PMID: 24621207.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Highly permeable double-skinned forward osmosis membranes for anti-fouling in the emulsified oil-water separation process. AU - Duong,Phuoc H H, AU - Chung,Tai-Shung, AU - Wei,Shawn, AU - Irish,Lana, Y1 - 2014/03/26/ PY - 2014/3/14/entrez PY - 2014/3/14/pubmed PY - 2014/9/26/medline SP - 4537 EP - 45 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 48 IS - 8 N2 - Forward osmosis (FO) has attracted wide attention in recent years. However, the FO performance may be restricted due to internal concentration polarization (ICP) and fast fouling propensity that occurs in the membrane sublayer. Particularly, these problems significantly affect the membrane performance when treating highly contaminated oily wastewater. Recently, double-skinned flat sheet cellulose acetate (CA) membranes consisting of two selective skins via the phase inversion method have demonstrated less ICP and fouling propensity over typical single-skinned membranes. However, these membranes exhibit low water fluxes of <12 LMH under 2 M NaCl draw solution. Therefore, a novel double-skinned FO membrane with a high water flux has been aimed for in this study for emulsified oil-water treatment. The double-skinned FO membrane comprises a fully porous sublayer sandwiched between (i) a truly dense skin for salt rejection and (ii) a fairly loose dense skin for emulsified oil particle rejection. The former dense skin is a polyamide synthesized via interfacial polymerization, while the latter one is a self-assembled sulfonated pentablock copolymer (Nexar copolymer) layer. The resultant double-skinned membrane exhibits a high water flux of 17.2 LMH and a low reverse salt transport of 4.85 gMH using 0.5 M NaCl as the draw solution and DI water as the feed. The double-skinned membrane outperforms the single-skinned membrane with much lower fouling propensity for emulsified oil-water separation. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/24621207/Highly_permeable_double_skinned_forward_osmosis_membranes_for_anti_fouling_in_the_emulsified_oil_water_separation_process_ L2 - https://dx.doi.org/10.1021/es405644u DB - PRIME DP - Unbound Medicine ER -