Mechanistic interpretation of solute permeation through a fully aromatic polyamide reverse osmosis membrane

Urama, Richard I.

doi:10.1016/s0376-7388(96)00230-x

Cited by 57 publications

(47 citation statements)

References 11 publications

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“…Some membranes also have a surface coating that yields a more hydrophilic, neutral and fouling-resistant surface (Coronell et al, 2008;Hachisuka and Ikeda, 2002;Petersen, 1993;Tang et al, 2007b). The active layer of RO membranes is the main barrier against the permeation of salt and contaminants which results from a combination of equilibrium partitioning at the water/active layer interfaces, and diffusive and advective transport (Mulder, 1996;Paul, 2004;Petersen, 1993;Tang et al, 2007b;Urama and Mariñas, 1997;Wijmans and Baker, 1995).…”

Section: Reverse Osmosismentioning

confidence: 99%

Strategies for the removal of halides from drinking water sources, and their applicability in disinfection by-product minimisation: A critical review

Watson

Farré

Knight

2012

Journal of Environmental Management

126

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The presence of bromide (Br(-)) and iodide (I(-)) in source waters leads to the formation of brominated and iodinated disinfection by-products (DBPs), which are often more toxic than their chlorinated analogues. The increasing scarcity of water resources in Australia is leading to use of impaired and alternative water supplies with high bromide and iodide levels, which may result in the production of more brominated and iodinated DBPs. This review aims to provide a summary of research into bromide and iodide removal from drinking water sources. Bromide and iodide removal techniques have been broadly classified into three categories, namely; membrane, electrochemical and adsorptive techniques. Reverse osmosis, nanofiltration and electrodialysis membrane techniques are reviewed. The electrochemical techniques discussed are electrolysis, capacitive deionization and membrane capacitive deionization. Studies on bromide and iodide removal using adsorptive techniques including; layered double hydroxides, impregnated activated carbons, carbon aerogels, ion exchange resins, aluminium coagulation and soils are also assessed. Halide removal techniques have been compared, and areas for future research have been identified.

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Section: Reverse Osmosismentioning

confidence: 99%

Strategies for the removal of halides from drinking water sources, and their applicability in disinfection by-product minimisation: A critical review

Watson

Farré

Knight

2012

Journal of Environmental Management

126

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“…It depends on the feed channel geometry. Uruma and Marinas (1997) found λ = 0.23 for spiral wound composite reverse osmosis membranes. h = 0.77 × 10 -3 m is the space between two spiral membrane sheets and S f = 3.15 10 -4 m?…”

Section: Solute Permeationmentioning

confidence: 98%

“…Both the solvent and the solute permeabilities give a global view of the membrane performances (Uruma and Marinas, 1997). The decrease of the rejection and the hydraulic permeability, coupled with the membrane wearing out is described by the solute and the solvent permeability coefficients evolution (Kimura, 1995).…”

Section: The Concept Of Residence Time Distribution (Rtd)mentioning

confidence: 99%

Spiral Wound Reverse Osmosis Modules Decomposition into Elementary Units by Analyzing Stimulus Response Experiments: Characterization of the Solute Transfer across the Membrane

2003

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TheoryThere are two approaches for flow modelling: the momentum equations deriving from Navier -Stokes equations and the global method issued from the exploitation of the tracing experiments (Danckwerts, 1953). The first one needs a tedious, finite-elements numerical resolution to obtain the flow pattern in each point of the device. It is difficult to conduct this methodology on the spiral wound reverse osmosis geometry. The second method splits up the device into a small number of well-known reactor flows (perfectly mixing cells, plug flow, dispersed plug flow) according to the device geometry (Leclerc et al., 1995).

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“…The partitioning-diffusion process which 32 governs RO membranes water transport and solutes rejection takes place at the water-33 membrane interface (PA active layer) and across the membrane (Urama and Mariñas, 1997). 34…”

Section: Introduction 28mentioning

confidence: 99%

Reverse osmosis membrane composition, structure and performance modification by bisulphite, iron(III), bromide and chlorite exposure

2016

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13Reverse osmosis (RO) membrane exposure to bisulphite, chlorite, bromide and iron(III) was 14 assessed in terms of membrane composition, structure and performance. Membrane 15 composition was determined by Rutherford backscattering spectrometry (RBS) and membrane 16 performance was assessed by water and chloride permeation, using a modified version of the 17 solution-diffusion model. Iron(III) dosage in presence of bisulphite led to an autooxidation of 18 the latter, probably generating free radicals which severely damaged the membrane. It 19 comprised a significant raise in chloride passage (chloride permeation coefficient increased 20 5.3-5.1 fold compared to the virgin membrane under the conditions studied) rapidly. No 21 major differences in terms of water permeability and membrane composition were observed. 22Nevertheless, an increase in the size of the network pores, and a raise in the fraction of 23 aggregate pores of the polyamide (PA) layer were identified, but no amide bond cleavage was 24 2 observed. These structural changes were therefore, in accordance with the transport 25 properties observed. 26 27

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Mechanistic interpretation of solute permeation through a fully aromatic polyamide reverse osmosis membrane

Cited by 57 publications

References 11 publications

Strategies for the removal of halides from drinking water sources, and their applicability in disinfection by-product minimisation: A critical review

Strategies for the removal of halides from drinking water sources, and their applicability in disinfection by-product minimisation: A critical review

Spiral Wound Reverse Osmosis Modules Decomposition into Elementary Units by Analyzing Stimulus Response Experiments: Characterization of the Solute Transfer across the Membrane

Reverse osmosis membrane composition, structure and performance modification by bisulphite, iron(III), bromide and chlorite exposure

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