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Superhydrophilic thin-film composite forward osmosis membranes for organic fouling control: fouling behavior and antifouling mechanisms.
Environ Sci Technol 2012; 46(20):11135-44ES

Abstract

This study investigates the fouling behavior and fouling resistance of superhydrophilic thin-film composite forward osmosis membranes functionalized with surface-tailored nanoparticles. Fouling experiments in both forward osmosis and reverse osmosis modes are performed with three model organic foulants: alginate, bovine serum albumin, and Suwannee river natural organic matter. A solution comprising monovalent and divalent salts is employed to simulate the solution chemistry of typical wastewater effluents. Reduced fouling is consistently observed for the superhydrophilic membranes compared to control thin-film composite polyamide membranes, in both reverse and forward osmosis modes. The fouling resistance and cleaning efficiency of the functionalized membranes is particularly outstanding in forward osmosis mode where the driving force for water flux is an osmotic pressure difference. To understand the mechanism of fouling, the intermolecular interactions between the foulants and the membrane surface are analyzed by direct force measurement using atomic force microscopy. Lower adhesion forces are observed for the superhydrophilic membranes compared to the control thin-film composite polyamide membranes. The magnitude and distribution of adhesion forces for the different membrane surfaces suggest that the antifouling properties of the superhydrophilic membranes originate from the barrier provided by the tightly bound hydration layer at their surface, as well as from the neutralization of the native carboxyl groups of thin-film composite polyamide membranes.

Authors+Show Affiliations

Department of Chemical and Environmental Engineering, Yale University , P.O. Box 208286 New Haven, Connecticut 06520-8286, USA.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

23002900

Citation

Tiraferri, Alberto, et al. "Superhydrophilic Thin-film Composite Forward Osmosis Membranes for Organic Fouling Control: Fouling Behavior and Antifouling Mechanisms." Environmental Science & Technology, vol. 46, no. 20, 2012, pp. 11135-44.
Tiraferri A, Kang Y, Giannelis EP, et al. Superhydrophilic thin-film composite forward osmosis membranes for organic fouling control: fouling behavior and antifouling mechanisms. Environ Sci Technol. 2012;46(20):11135-44.
Tiraferri, A., Kang, Y., Giannelis, E. P., & Elimelech, M. (2012). Superhydrophilic thin-film composite forward osmosis membranes for organic fouling control: fouling behavior and antifouling mechanisms. Environmental Science & Technology, 46(20), pp. 11135-44. doi:10.1021/es3028617.
Tiraferri A, et al. Superhydrophilic Thin-film Composite Forward Osmosis Membranes for Organic Fouling Control: Fouling Behavior and Antifouling Mechanisms. Environ Sci Technol. 2012 Oct 16;46(20):11135-44. PubMed PMID: 23002900.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Superhydrophilic thin-film composite forward osmosis membranes for organic fouling control: fouling behavior and antifouling mechanisms. AU - Tiraferri,Alberto, AU - Kang,Yan, AU - Giannelis,Emmanuel P, AU - Elimelech,Menachem, Y1 - 2012/10/04/ PY - 2012/9/26/entrez PY - 2012/9/26/pubmed PY - 2013/3/27/medline SP - 11135 EP - 44 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 46 IS - 20 N2 - This study investigates the fouling behavior and fouling resistance of superhydrophilic thin-film composite forward osmosis membranes functionalized with surface-tailored nanoparticles. Fouling experiments in both forward osmosis and reverse osmosis modes are performed with three model organic foulants: alginate, bovine serum albumin, and Suwannee river natural organic matter. A solution comprising monovalent and divalent salts is employed to simulate the solution chemistry of typical wastewater effluents. Reduced fouling is consistently observed for the superhydrophilic membranes compared to control thin-film composite polyamide membranes, in both reverse and forward osmosis modes. The fouling resistance and cleaning efficiency of the functionalized membranes is particularly outstanding in forward osmosis mode where the driving force for water flux is an osmotic pressure difference. To understand the mechanism of fouling, the intermolecular interactions between the foulants and the membrane surface are analyzed by direct force measurement using atomic force microscopy. Lower adhesion forces are observed for the superhydrophilic membranes compared to the control thin-film composite polyamide membranes. The magnitude and distribution of adhesion forces for the different membrane surfaces suggest that the antifouling properties of the superhydrophilic membranes originate from the barrier provided by the tightly bound hydration layer at their surface, as well as from the neutralization of the native carboxyl groups of thin-film composite polyamide membranes. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/23002900/Superhydrophilic_thin_film_composite_forward_osmosis_membranes_for_organic_fouling_control:_fouling_behavior_and_antifouling_mechanisms_ L2 - https://dx.doi.org/10.1021/es3028617 DB - PRIME DP - Unbound Medicine ER -