Hydrophilic hollow fiber membranes for water desalination by the pervaporation method

Korin, Eli; Ladizhensky, Izhak; Korngold, E.

doi:10.1016/s0255-2701(96)04157-8

Cited by 39 publications

(18 citation statements)

References 3 publications

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“…The flux at 1852 ml/min was used as a denominator, which is the maximum, to calculate flux-retaining efficiency, defined as the ratio relative to the maximum. At the flow rate of 1852 and 896 ml/min, respectively, the cooling temperatures were investigated from 12°C to 25°C while keeping the brine 2 temperature at 68 and 69 °C correspondingly. The maximum flux at 12°C was used as a denominator to calculate the corresponding ratio relative to the maximum at various cooling temperatures.…”

Section: Separationmentioning

confidence: 99%

“…The preliminary cost evaluation of MD [ 1 ] indicated that it might be an economical process for a relatively smallscale system. Compared with RO, MD needs a simple pretreatment of the supply water arid is less dependent on the initial salinity of the water resource as well as a higher salt rejection ratio, above 99% [2]. In addition, it provides the possibility of working at low temperature and/or using low-grade, waste or alternative energy sources compared to conventional stills.…”

Section: Introductionmentioning

confidence: 99%

“…One of the serious problems is the membrane wetting [3], which causes MD to slow down and even halt in the worst cases during prolonged use. Therefore, the dense hydrophilic or partially hydrophilic membranes were developed for this process [2,[4][5][6], but only with a flux below 6 kg/h'm 2.…”

Section: Introductionmentioning

confidence: 99%

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Desalination by membrane distillation adopting a hydrophilic membrane

2005

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Section: Separationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Desalination by membrane distillation adopting a hydrophilic membrane

2005

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“…While there is only a limited amount of research, pervaporation has shown promise in desalination applications, including for the production of irrigation water [6,7,10], where hydrophilic membranes have been used to facilitate selective permeation of water and reject contaminants.…”

mentioning

confidence: 99%

Salt rejection and water flux through a tubular pervaporative polymer membrane designed for irrigation applications

Sule

Jiang

Templeton

et al. 2013

Environmental Technology

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The performance of a hydrophilic polyester tubular pervaporative membrane in treating high-salinity water for irrigation was investigated. The membrane was filled with contaminated water and placed in air, soil or sand media. When this occurs water diffuses through the tube, trapping salts within the tube. Sorption and permeation tests and scanning electron microscopy (SEM) were used to assess salt rejection and permeate flux through the tubular membrane when surrounded by deionized water, air, top soil or silver sand. Mean water uptake by the membrane was 0.5 L x m(-2) at room temperature and the water diffusion coefficient was 3.8 x 10(-4) cm2 x s(-1). The permeate flux across the membrane was 7.9 x 10(-3) L(m(-2) x h(-1)) in sand and 5.6 x 10(-2) in air. The rejection of sodium chloride by the tubular membrane in sand was 99.8% or above under all tested conditions. However, when the tube was filled with sodium chloride solution and placed in deionized water, salt was observed to permeate the membrane. SEM images confirmed that variable amounts of sodium chloride crystals were retained inside the membrane walls. These results support the potential application of such a tubular pervaporative membrane for irrigation applications using saline waters; however there may be reduced salt rejection under waterlogged soil conditions.

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“…Pervaporation differs from conventional membrane processes, in that the permeate changes phase from liquid to vapor on the permeate side of the membrane ( Jonquieres et al, 2002;Shao and Huang, 2007). Because it is a nonpressuredriven membrane process, there has recently been a spike in interest in using pervaporation for desalination (Korngold and Korin, 1993;Korin et al, 1996;Korngold et al, 1996;Zwijnenberg et al, 2005;Quinones-Bolanos et al, 2005a, 2005bQuinones-Bolanos and Zhou, 2006;Xie et al, 2011;Drobek et al, 2012;Sule et al, 2013;Todman et al, 2013aTodman et al, , 2013bHuth et al, 2014). Researchers have looked at subsurface pervaporation irrigation as a way to combine water treatment (desalination) with beneficial reuse (Quinones-Bolanos et al, 2005a, 2005bQuinones-Bolanos and Zhou, 2006;Sule et al, 2013;Todman et al, 2013aTodman et al, , 2013b.…”

Section: Introductionmentioning

confidence: 99%

Interrelationships Between Flux, Membrane Properties, and Soil Water Transport in a Subsurface Pervaporation Irrigation System

Muthu

BrantJonathan

2015

Environmental Engineering Science

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Oil and natural gas-produced waters are by-products of energy development that present unique challenges to the energy industry and impacted landowners. Conventionally, produced waters are typically saline and therefore must be desalinated to some extent before beneficial reuse. Subsurface pervaporation irrigation combines desalination with beneficial reuse in the form of crop irrigation. This investigation studied factors governing water flux for two membranes, one polyether ester (PEE) and one cellulose triacetate (CTA), for use in subsurface pervaporation irrigation. Water flux was determined to be a function of membrane properties (thickness, hydrophilicity) and environmental variables (vapor pressure gradient, soil texture, soil clay content). Specific water fluxes ranged from a maximum of 6.77 · 10 -2 L/[m 2 $day$Pa] for CTA membranes to a minimum of 7.97 · 10 -3 L/[m 2 $day$Pa] for PEE membranes. Fluxes increased as water vapor pressure in the soil adjacent to the membrane decreased. Total soil water potential and its specific components, matric potential and osmotic potential, influenced flux. Clayey and peaty soils have a lower matric potential than sand for the same soil water content, which translated to a lower vapor pressure and hence higher flux for clayey/peaty soils.

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Hydrophilic hollow fiber membranes for water desalination by the pervaporation method

Cited by 39 publications

References 3 publications

Desalination by membrane distillation adopting a hydrophilic membrane

Desalination by membrane distillation adopting a hydrophilic membrane

Salt rejection and water flux through a tubular pervaporative polymer membrane designed for irrigation applications

Interrelationships Between Flux, Membrane Properties, and Soil Water Transport in a Subsurface Pervaporation Irrigation System

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