Key physicochemical characteristics governing organic micropollutant adsorption and transport in ion-exchange membranes during reverse electrodialysis

Roman, Malgorzata; Dijk, LH Van; Gutierrez, Leonardo; Vanoppen, Marjolein; Post, J.W.; Wols, BA; Cornelissen, Emile; Verliefde, Arne

doi:10.1016/j.desal.2019.114084

Cited by 29 publications

(19 citation statements)

References 27 publications

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“…However, similar to AEMs, the amount of OMPs adsorbed in CEMs increased with the membrane thickness ( Figure 3 B). Previous results also emphasized the importance of hydrophobic interactions in the adsorption of non-charged OMPs in IEMs ( Roman et al., 2019 ). However, this is the first study investigating this phenomenon in AEMs and CEMs individually.…”

Section: Resultsmentioning

confidence: 84%

“…As indicated in our former work, electrostatic interactions are the primary force governing the adsorption of charged OMPs in IEMs (Roman et al, 2019). This type of interaction is long-range, develops fast, and is characterized by the highest strength among non-covalent interactions (Hobza and Mü ller-Dethlefs, 2010).…”

Section: Resultsmentioning

confidence: 84%

“…The topological polar surface area is the area of its van der Waals surface arising from oxygen or nitrogen atoms, or hydrogen atoms attached to oxygen or nitrogen atoms. As such, it is a measure of the compound's capacity to form hydrogen bonds ( Roman et al., 2019 ; Clark, 1999 ). Probably, the formation of hydrogen bonds at the membrane surface is responsible for limiting the transport of OMPs in the investigated CEMs.…”

Section: Resultsmentioning

confidence: 99%

“…Previous studies on organics transport in IEM focused mainly on the investigation of the transport of OMPs in a complete IEM stack consisting of alternating cation-exchange membranes (CEM) and anion-exchange membranes (AEM). Thus, only the net transport over the entire stack (i.e., combined transport through AEM and CEM) is reported ( Roman et al., 2019 ; Vanoppen et al., 2015 ; Banasiak and Schäfer, 2009 ). On a single-membrane level (i.e., more fundamental study), the ratio of OMP radius to membrane pore radius (and thus diffusive hindrance factors) has been found as the most influential transport parameter of OMPs in IEMs ( Ma et al., 2018 ).…”

Section: Introductionmentioning

confidence: 99%

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Non-steady diffusion and adsorption of organic micropollutants in ion-exchange membranes: effect of the membrane thickness

Roman

Roman²,

Verbeke

et al. 2021

iScience

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Summary There is no efficient wastewater treatment solution for removing organic micropollutants (OMPs), which, therefore, are continuously introduced to the Earth's surface waters. This creates a severe risk to aquatic ecosystems and human health. In emerging water treatment processes based on ion-exchange membranes (IEM), transport of OMPs through membranes remains unknown. We performed a comprehensive investigation of the OMP transport through a single IEM under non-steady-state conditions. For the first time, positron annihilation lifetime spectroscopy was used to study differences in the free volume element radius between anion- and cation-exchange membranes, and between their thicknesses. The dynamic diffusion-adsorption model was used to calculate the adsorption and diffusion coefficients of OMPs. Remarkably, diffusion coefficients increased with the membrane thickness, where its surface resistance was more evident in thinner membranes. Presented results will contribute to the improved design of next-generation IEMs with higher selectivity toward multiple types of organic compounds.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Non-steady diffusion and adsorption of organic micropollutants in ion-exchange membranes: effect of the membrane thickness

Roman

Roman²,

Verbeke

et al. 2021

iScience

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“…Simulation results showed that hybrid RED-RO systems either with assisted or conventional RED yielded cost savings compared to standalone SWRO [426]. However, a critical issue affecting these RED-RO systems is the potential contamination of the seawater by organic micropollutants that may be adsorbed and transported from the impaired water [427]. In contrast, this problem is less important in RO-RED schemes (Section 6.3), where the RED process is fed by the RO reject brine and the WWTP effluent.…”

Section: Energy Recoverymentioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and other treatments with significant environmental benefits. ED technologies can be used in operations of concentration, dilution, desalination, regeneration, and valorisation to reclaim wastewater and recover water and/or other products, e.g., heavy metal ions, salts, acids/bases, nutrients, and organics, or electrical energy. Intense research activity has been directed towards developing enhanced or novel systems, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive. Despite few real plants having been installed, recent developments are opening new routes for the large-scale use of ED techniques in a plethora of treatment processes for wastewater.

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Introduction to Membrane Distillation and Its Application in Emerging Contaminants Removal

Misra

Nishad

Singh

2021

Energy, Environment, and Sustainability

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Key physicochemical characteristics governing organic micropollutant adsorption and transport in ion-exchange membranes during reverse electrodialysis

Cited by 29 publications

References 27 publications

Non-steady diffusion and adsorption of organic micropollutants in ion-exchange membranes: effect of the membrane thickness

Non-steady diffusion and adsorption of organic micropollutants in ion-exchange membranes: effect of the membrane thickness

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

Introduction to Membrane Distillation and Its Application in Emerging Contaminants Removal

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