Fouling characteristics of dissolved organic matter in fresh water and seawater compartments of reverse electrodialysis under natural water conditions

Chon, Kangmin; Jeong, Namjo; Rho, Hojung; Nam, Joo-Youn; Jwa, Eunjin; Cho, Jaeweon

doi:10.1016/j.desal.2020.114478

Cited by 46 publications

(17 citation statements)

References 40 publications

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“…Flow dynamics have a substantial impact on power density results leading to the development of turbulence-inducing woven spacers [ 260 , 261 ]. Furthermore, membrane permselectivity has proven to be another critical factor for RED, since divalent cations can greatly affect the power capacity causing an efficiency drop and increasing the membrane resistance by possible scaling [ 261 , 262 , 263 ]. The development of monovalent permselective membranes based on charge repulsion or steric exclusion as well as the better understanding of scaling mechanisms, especially in relation to the pH, paves the way toward improved more viable performances [ 85 , 263 , 264 , 265 , 266 ].…”

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

“…Furthermore, membrane permselectivity has proven to be another critical factor for RED, since divalent cations can greatly affect the power capacity causing an efficiency drop and increasing the membrane resistance by possible scaling [ 261 , 262 , 263 ]. The development of monovalent permselective membranes based on charge repulsion or steric exclusion as well as the better understanding of scaling mechanisms, especially in relation to the pH, paves the way toward improved more viable performances [ 85 , 263 , 264 , 265 , 266 ]. Yet, RED applications on close systems relying on artificially-prepared streams of monovalent ions still outperform by far equipment implemented in natural environments such as estuaries for which organic fouling also must be considered [ 257 , 267 , 268 , 269 ].…”

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

“…Despite these encouraging results, the economic viability of RED is still precarious, largely due to membrane cost and maintenance as well as the low current densities attained. Power densities greater than 2 W/m² were evaluated as economically suitable for capturing SGP [ 263 , 272 ]. However, more profitable strategies are currently studied by combining RED with sea water desalination units for better eco-efficiency (see Section 5.1.3 ).…”

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

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Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

Bazinet

Geoffroy

2020

Membranes

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In the context of preserving and improving human health, electrodialytic processes are very promising perspectives. Indeed, they allow the treatment of water, preservation of food products, production of bioactive compounds, extraction of organic acids, and recovery of energy from natural and wastewaters without major environmental impact. Hence, the aim of the present review is to give a global portrait of the most recent developments in electrodialytic membrane phenomena and their uses in sustainable strategies. It has appeared that new knowledge on pulsed electric fields, electroconvective vortices, overlimiting conditions and reversal modes as well as recent demonstrations of their applications are currently boosting the interest for electrodialytic processes. However, the hurdles are still high when dealing with scale-ups and real-life conditions. Furthermore, looking at the recent research trends, potable water and wastewater treatment as well as the production of value-added bioactive products in a circular economy will probably be the main applications to be developed and improved. All these processes, taking into account their principles and specificities, can be used for specific eco-efficient applications. However, to prove the sustainability of such process strategies, more life cycle assessments will be necessary to convince people of the merits of coupling these technologies.

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Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

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Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

Bazinet

Geoffroy

2020

Membranes

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“…When natural feed streams such as river and sea waters or supersaline lake are used in an RED system without adequate pretreatments, a mixture of fouling particles mainly composed of scaling minerals and organic foulants can accumulate on the membrane's surface 133 over time and affects the RED performance and life. Membrane fouling with natural waters is a big challenge, especially fouling of AEMs by organic matters identified as a main cause of performance loss in RED with natural waters 134,135 . Taking advantage of the high salinity gradient between urine and urine flushing water, Volpin et al extracted SGP with RED and reported performance loss caused by organic fouling and the presence of multivalents ions in the solution 136 .…”

Section: Reverse Electrodialysismentioning

confidence: 99%

From non‐renewable energy to renewable by harvesting salinity gradient power by reverse electrodialysis: A review

Zoungrana

Çakmakçı

2020

Int J Energy Res

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Summary Fossil fuel is scanty and negatively affects the earth by inducing climate change. As a result, alternative and renewable energy (RE) sources are being investigated to replace fossil fuel. Wind and solar energy are leaders in the RE market, but huge and accessible other energy sources such as salinity gradient power (SGP) exist and need to be collected to contribute to the global energy demand. SGP is mainly extracted with reverse electrodialysis (RED) and pressure retarded osmosis (PRO) systems. The applicability of RED‐SGP in a natural environment is the current challenge due to the low power density and the high Levelized cost of energy (LCOE) of the process. The properties of the ion‐exchange membranes (IEMs), the spacers, the feed solutions characteristics and salinity, and the electrodes are among the most important parameters that control the performance of RED‐SGP processes. New highly selective, conductive, and cost‐effective membranes are required to improve RED performance and reduce the produced energy cost. Alternatives feed solutions such as wastewaters and brine from desalination plants as well as hybrid RED such as RED combined to electrodialysis (ED), reverse osmosis (RO), or membrane distillation (MD) will result in cost‐effective water treatment and SGP extraction.

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“…For the first time, the fouling behavior of RED stacks that are operated for 25 days without cleaning and supplied by natural seawater and river water was investigated by Vermaas et al [8]. The performance of IEMs is adversely affected by fouling, since it leads to increases in the pressure drop and to a significant loss of the obtainable net power density, owing to an increased membrane electro-resistance, a reduced counterions permselectivity, as well as alterations in membrane properties [9,10]. In this respect, AEMs are much more sensitive to fouling issues due to the interactions between their fixed positively charged groups and the negatively charged natural organic matter (NOM) [11].…”

Section: Introductionmentioning

confidence: 99%

Surface Modifications of Anion Exchange Membranes for an Improved Reverse Electrodialysis Process Performance: A Review

2020

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Reverse electrodialysis (RED) technology represents a promising electro-membrane process for renewable energy harvesting from aqueous streams with different salinity. However, the performance of the key components of the system, that is, the ion exchange membranes, is limited by both the presence of multivalent ions and fouling phenomena, thus leading to a reduced generated net power density. In this context, the behavior of anion exchange membranes (AEMs) in RED systems is more severely affected, due to the undesirable interactions between their positively charged fixed groups and, mostly negatively charged, foulant materials present in natural streams. Therefore, controlling both the monovalent anion permselectivity and the membrane surface hydrophilicity is crucial. In this respect, different surface modification procedures were considered in the literature, to enhance the above-mentioned properties. This review reports and discusses the currently available approaches for surface modifications of AEMs, such as graft polymerization, dip coating, and layer-by-layer, among others, mainly focusing on preparing monovalent permselective AEMs with antifouling characteristics, but also considering hydrophilicity aspects and identifying the most promising modifying agents to be utilized. Thus, the present study aimed at providing new insights for the further design and development of selective, durable, and cost-effective modified AEMs for an enhanced RED process performance, which is indispensable for a practical implementation of this electro-membrane technology at an industrial scale.

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Fouling characteristics of dissolved organic matter in fresh water and seawater compartments of reverse electrodialysis under natural water conditions

Cited by 46 publications

References 40 publications

Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

Electrodialytic Processes: Market Overview, Membrane Phenomena, Recent Developments and Sustainable Strategies

From non‐renewable energy to renewable by harvesting salinity gradient power by reverse electrodialysis: A review

Surface Modifications of Anion Exchange Membranes for an Improved Reverse Electrodialysis Process Performance: A Review

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