Change in membrane performance due to organic fouling in nanofiltration (NF)/reverse osmosis (RO) applications

Agenson, K.O.; Urase, Taro

doi:10.1016/j.seppur.2006.11.010

Cited by 181 publications

(84 citation statements)

References 28 publications

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“…Several previous studies have demonstrated the excellent capability of NF/RO to remove a wide range of volatile organic compounds including trihalomethanes, organochloric compounds, petroleum hydrocarbons and other low molecular weight compounds such as toluene and trichloroethylene [5,8]. These studies have also revealed a substantial degree of complexity associated with the separation processes involved.…”

Section: Introductionmentioning

confidence: 99%

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Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Altalyan

Jones

Bradd

et al. 2016

Journal of Water Process Engineering

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. (2016). Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration. Journal of Water Process Engineering, 9 9-21. Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration AbstractA comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region). The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater. The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4% and 100%, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds. Keywords:Volatile organic compounds (VOCs) Reverse osmosis (RO) Nanofiltration (NF) Botany Bay ABSTRACT A comprehensive study was conducted to examine the removal of volatile organic compounds (VOCs) which exist in groundwater at Southlands-Botany Bay (Sydney region).The ability of nanofiltration (NF) and reverse osmosis (RO) as advanced treatments was investigated using two commercially available NF or RO membranes. Laboratory-scale tests were used with cross-flow; tests were conducted with 16 ubiquitous compounds that represented the significant volatile organic compounds found in the contaminated groundwater.The results reported in this study indicate that the removal efficiency of reverse osmosis (RO) was better than NF in rejecting the VOCs detected in groundwater. This study revealed that the performance of NF and RO membranes in rejecting hydrophilic volatile organic compounds was higher than that for hydrophobic compounds and the highest rejection achieved by NF and RO membranes amounted 98.4 % and 100 %, respectively. Hydrophilic compounds can be effectively rejected by NF/RO membranes using the size exclusion mechanism (steric hindrance), whereas hydrophobic compounds can be adsorbed into NF/RO membranes and then diffuse through the dense polymeric matrix, resulting in the lower removal for these compounds compared to hydrophilic compounds.

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Section: Introductionmentioning

confidence: 99%

“…In the last decade, nanofiltration (NF) and reverse osmosis (RO) have been proposed as attractive technologies for removal of organic trace contaminants including volatile organic compounds from the aquatic environment instead of conventional wastewater treatment [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Altalyan

Jones

Bradd

et al. 2016

Journal of Water Process Engineering

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“…Due to the cake formed on the membrane surface, back diffusion to the feed is hindered which causes accumulation on the membrane surface and consequent diffusion through the membrane polymer [2,90,97].…”

Section: Membrane Fouling Decreases Xenobiotics Retentionmentioning

confidence: 99%

Xenobiotics Removal by Membrane Technology: An Overview

Semiao

Schäfer

2009

Environmental Pollution

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Small molecular weight xenobiotics are compounds of extreme concern in potable water applications due to their adverse human health and environmental effects. However, conventional water treatment processes cannot fully and systematically remove them due to their low concentrations in natural waters and wastewaters. Biological limitation to degrade such compounds is another cause for inefficient removal.Physical barriers like membranes possessing pore sizes smaller than the compounds to be removed emerged as a good solution. Nanofiltration and reverse osmosis proved to be quite effective for xenobiotics removal in potable water production in the Paris purification plant of Méry-sur-Oise. However, even these very narrow pore membrane processes may result in incomplete removal: xenobiotics retention is high but factors such as adsorption, size exclusion and charge repulsion affect unpredictably their retention. The water solutions complexity to be treated renders xenobiotics removal predictions even more difficult due to interactions between xenobiotics and compounds in water.Removal of xenobiotics by microfiltration and ultrafiltration is very low because adsorption on the membrane is the main retention mechanism. Combining those with other processes (e.g. activated carbon) can considerably improve xenobiotics removal.The least studied processes in xenobiotics removal are electrodialysis, membrane distillation and pervaporation. Electrodialysis removal of organic xenobiotics shows a breakthrough through the membrane possibly due to adsorption followed by diffusion. Membrane distillation presents high removal rates of xenobiotics due to the compounds low vapour pressure. For volatile organic xenobiotics or solutions of trace amounts both membrane distillation and pervaporation can be used, xenobiotics interaction with the membrane being the key factor.In this book chapter a thorough synopsis of current knowledge on xenobiotics removal is presented and balanced with recent fundamental studies of underlying mechanisms, informing both the practitioner regarding membrane capabilities for xenobiotics removal and the researcher with the current state-of-art.

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“…Existen numerosos estudios dirigidos al análisis y eliminación del ensuciamiento de las membranas, ya que es un factor limitante de todos los procesos donde interviene este tipo de filtración [112][113] [114].…”

Section: Ensuciamiento O "Fouling"unclassified

“…Las características de estos efluentes hacen que las membranas de nanofiltración sean obstruidas por las partículas coloidales y la materia orgánica, fenómeno que se describe con el termino anglosajón "fouling" (ver apartado 1.4.2.2 Fenómenos limitantes de la nanofiltración) [112][113] [114]. Este fenómeno produce:…”

Section: Figura 426 Retención Del Boro Por Una Membrana Nf-90 En Esunclassified

Aplicaciones estratégicas de la Nanofiltración para el tratamiento de las aguas en la industria cerámica

Salvador¹,

Cayetano²

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Change in membrane performance due to organic fouling in nanofiltration (NF)/reverse osmosis (RO) applications

Cited by 181 publications

References 28 publications

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Removal of volatile organic compounds (VOCs) from groundwater by reverse osmosis and nanofiltration

Xenobiotics Removal by Membrane Technology: An Overview

Aplicaciones estratégicas de la Nanofiltración para el tratamiento de las aguas en la industria cerámica

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