Journal ArticleDOI
Effect of Membrane Surface Roughness on Colloid−Membrane DLVO Interactions
TLDR
In this article, a model for predicting the Derjaguin−Landau−Verwey−Overbeek (DLVO) interaction energy between colloidal particles and rough membrane surfaces is developed.Abstract:
Recent experimental investigations suggest that interaction of colloidal particles with polymeric membrane surfaces is influenced by membrane surface morphology (roughness). To better understand the consequences of surface roughness on colloid deposition and fouling, it is imperative that models for predicting the Derjaguin−Landau−Verwey−Overbeek (DLVO) interaction energy between colloidal particles and rough membrane surfaces be developed. We present a technique of reconstructing the mathematical topology of polymeric membrane surfaces using statistical parameters derived from atomic force microscopy roughness analyses. The surface element integration technique is used to calculate the DLVO interactions between spherical colloidal particles and the simulated (reconstructed) membrane surfaces. Predictions show that the repulsive interaction energy barrier between a colloidal particle and a rough membrane is lower than the corresponding barrier for a smooth membrane. The reduction in the energy barrier is ...read more
Citations
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Journal ArticleDOI
Interfacial polymerization of thin film nanocomposites: A new concept for reverse osmosis membranes
Byeong-Heon Jeong,Eric M.V. Hoek,Yushan Yan,Arun Subramani,Xiaofei Huang,Gil Hurwitz,A. K. Ghosh,Anna Jawor +7 more
TL;DR: In this article, a new concept for formation of mixed matrix reverse osmosis membranes by interfacial polymerization of nanocomposite thin films in situ on porous polysulfone supports is reported.
Journal ArticleDOI
Preparation and Characterization of Membranes Formed by Nonsolvent Induced Phase Separation: A Review
TL;DR: A review of nonsolvent induced phase separation membrane preparation and characterization for many commonly used membrane polymers is presented in this article, which includes membrane porosity and pore size distribution characterization, membrane physical and chemical properties characterization, and thermodynamic and kinetic evaluation of phase inversion process.
Journal ArticleDOI
Organic fouling of forward osmosis membranes: Fouling reversibility and cleaning without chemical reagents
Baoxia Mi,Menachem Elimelech +1 more
TL;DR: In this article, the authors used alginate as a model organic foulant to examine forward osmosis (FO) membrane fouling and cleaning behavior with the ultimate goal of determining the underlying FO fouling/cleaning mechanisms.
Journal ArticleDOI
Drawbacks of applying nanofiltration and how to avoid them: A review
TL;DR: In this article, the authors identify six challenges for nanofiltration where solutions are still scarce: avoiding membrane fouling, and possibilities to remediate, improving the separation between solutes that can be achieved, further treatment of concentrates, chemical resistance and limited lifetime of membranes, insufficient rejection of pollutants in water treatment, and the need for modelling and simulation tools.
Journal ArticleDOI
Impacts of reaction and curing conditions on polyamide composite reverse osmosis membrane properties
TL;DR: In this paper, the impacts of organic solvent properties, reaction conditions, and curing conditions on polyamide composite reverse osmosis membrane separation performance, film structure, and interfacial properties are reported.
References
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Journal ArticleDOI
Influence of membrane surface properties on initial rate of colloidal fouling of reverse osmosis and nanofiltration membranes
TL;DR: In this article, the most influential membrane properties governing colloidal fouling rate of reverse osmosis (RO) and nanofiltration (NF) membranes were identified for physical surface morphology, surface chemical properties, surface zeta potential, and specific surface chemical structure.
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Acid—base interfacial interactions in aqueous media
TL;DR: The role of electron acceptor and electron-donor interactions in polar media, especially in aqueous media, is reviewed, together with the role of interfacial Lifshitz-van der Waals (LW) interactions, which, although often relatively weak, are always present as mentioned in this paper.
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Role of membrane surface morphology in colloidal fouling of cellulose acetate and composite aromatic polyamide reverse osmosis membranes
TL;DR: In this article, the authors compared the fouling behavior of cellulose acetate and aromatic polyamide thin-film composite reverse osmosis (RO) membranes at identical initial permeation rates.
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Assessing short-range membrane–colloid interactions using surface energetics
TL;DR: In this article, the authors evaluated the surface energies of several membranes and colloids using the Lifshitz-van der Waals acid-base approach and found that all of the studied membranes have substantially low surface energies compared to the colloids.
Journal ArticleDOI
Effect of particle size on collision efficiency in the deposition of Brownian particles with electrostatic energy barriers
TL;DR: The influence of the dimension des particules sur le depot de polystyrene sur un lit de particules spheriques de verre is studied in this paper, where the dimension of polystyrenes is defined as: