Nitrate removal from natural water by coupling adsorption and Donnan dialysis

Turki, Thouraya; Amor, Mohamed Ben

doi:10.2166/ws.2016.169

Cited by 10 publications

(5 citation statements)

References 25 publications

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“…34 In potential applications, DD using a thin flow cell with an acid receiving phase could extract contaminating ions away from Li + if the cation-exchange membrane were highly permeable and selective for the contaminating ions. Previous reports examined DD for separations such as the isolation of Au 3+ from Ni 2+ and Cu 2+ , 35 removal of Mg 2+ and Ca 2+ from lime-softening sludge, 36 capture of Cu 2+ , 37 nitrate, 38 or borate 39 from aqueous solutions, and the exchange of Mg 2+ in river water with Na + in seawater prior to reverse ED. 40 However, low selectivity limits DD applications, most of which focus on separating ions with different valences.…”

Section: Introductionmentioning

confidence: 99%

High Selectivities among Monovalent Cations in Dialysis through Cation-Exchange Membranes Coated with Polyelectrolyte Multilayers

Yang

Tang

Ahmad

et al. 2018

ACS Appl. Mater. Interfaces

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Cation-exchange membranes allow preferential passage of cations over anions, but they show minimal selectivity among cations, which limits their use in ion separations. Recent studies show that modification of cation-exchange membranes with polyelectrolyte multilayers leads to exceptional monovalent/divalent cation electrodialysis selectivities, but no studies report high selectivity among monovalent ions. This work demonstrates that adsorption of protonated poly(allylamine) (PAH)/poly(4-styrenesulfonate) (PSS) multilayers on Nafion membranes leads to high K + /Li + selectivities in Donnan dialysis, where K + and Li + ions in a source phase pass through the membrane and exchange with Na + ions in a receiving phase. Addition of 0.01 M HNO 3 to a source phase containing 0.01 M KNO 3 and 0.01 M LiNO 3 increases the K + /Li + selectivity from 8 to ∼60 through (PAH/PSS) 5 PAH-coated Nafion membranes, primarily because of a ≥fivefold increase in K + flux. These selectivities are much larger than the ratio of 1.9 for the aqueous diffusion coefficients of K + and Li + , and uncoated Nafion membranes give a K + /Li + selectivity <3. Bi-ionic transmembrane potential measurements at neutral pH confirm that the membrane is more permeable to K + than Li + , but this selectivity is less than in Donnan dialysis with acidic solutions. In situ ellipsometry data indicate that PAH/PSS multilayers (assembled at pH 2.3, 7.5, or 9.3) swell at pH 2.0, and this swelling may open cationexchange sites that preferentially bind K + to enable highly selective transport. The coated membranes also exhibit modest selectivity for K + over H + , suggesting selective transport based on preferential partitioning of K + into the coatings. Selectivity declines when increasing the source-phase KNO 3 concentration to 0.1 M, perhaps because the discriminating transport pathway saturates. Moreover, selectivities are lower in electrodialysis than in Donnan dialysis, presumably because electrodialysis engages other transport mechanisms, such as electroosmosis and strong electromigration.

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Section: Introductionmentioning

confidence: 99%

High Selectivities among Monovalent Cations in Dialysis through Cation-Exchange Membranes Coated with Polyelectrolyte Multilayers

Yang

Tang

Ahmad

et al. 2018

ACS Appl. Mater. Interfaces

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“…The driving force in Donnan dialysis is the chemical potential gradient. Donnan dialysis is widely used to recover and eliminate various ions such as nitrates, fluorides, chromium and phosphates [ 14 , 21 , 104 , 105 , 106 , 107 , 108 , 109 ].…”

Section: Main Results Obtained During the Period 2012–2022mentioning

confidence: 99%

Research on Membranes and Their Associated Processes at the Université Paris-Est Créteil: Progress Report, Perspectives, and National and International Collaborations

et al. 2023

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Research on membranes and their associated processes was initiated in 1970 at the University of Paris XII/IUT de Créteil, which became in 2010 the University Paris-Est Créteil (UPEC). This research initially focused on the development and applications of pervaporation membranes, then concerned the metrology of ion-exchange membranes, then expanded to dialysis processes using these membranes, and recently opened to composite membranes and their applications in production or purification processes. Both experimental and fundamental aspects have been developed in parallel. This evolution has been reinforced by an opening to the French and European industries, and to the international scene, especially to the Krasnodar Membrane Institute (Kuban State University—Russia) and to the Department of Chemistry, (Qassim University—Saudi Arabia). Here, we first presented the history of this research activity, then developed the main research axes carried out at UPEC over the 2012–2022 period; then, we gave the main results obtained, and finally, showed the cross contribution of the developed collaborations. We avoided a chronological presentation of these activities and grouped them by theme: composite membranes and ion-exchange membranes. For composite membranes, we have detailed three applications: highly selective lithium-ion extraction, bleach production, and water and industrial effluent treatments. For ion-exchange membranes, we focused on their characterization methods, their use in Neutralization Dialysis for brackish water demineralization, and their fouling and antifouling processes. It appears that the research activities on membranes within UPEC are very dynamic and fruitful, and benefit from scientific exchanges with our Russian partners, which contributed to the development of strong membrane activity on water treatment within Qassim University. Finally, four main perspectives of this research activity were given: the design of autonomous and energy self-sufficient processes, refinement of characterization by Electrochemical Scanning Microscopy, functional membrane separators, and green membrane preparation and use.

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“…However, over 95 years after the inception of DMP, the technology is yet to be fully researched and have its full potential understood. As an extremely slow kinetic process for ion transport that takes a longer period to achieve equilibrium, and concentration and separation of metal species, many approaches have not geared towards industrial applications [ 122 , 123 ]. Therefore, there is the proposed need for the integration of DMP to other separation processes rather than have a single DMP system, as cited in Table 2 , where DMP is incorporated with other processes.…”

Section: Trends For Target Metal Ionmentioning

confidence: 99%

Donnan Membrane Process for the Selective Recovery and Removal of Target Metal Ions—A Mini Review

et al. 2021

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Membrane-based water purification technologies contribute significantly to water settings, where it is imperative to use low-cost energy sources to make the process economically and technically competitive for large-scale applications. Donnan membrane processes (DMPs) are driven by a potential gradient across an ion exchange membrane and have an advantage over fouling in conventional pressure driven membrane technologies, which are gaining attention. DMP is a removal, recovery and recycling technology that is commonly used for separation, purification and the concentrating of metals in different water and waste streams. In this study, the principle and application of DMP for sustainable wastewater treatment and prospects of chemical remediation are reviewed and discussed. In addition, the separation of dissolved metal ions in wastewater settings without the use of pressure driven gradients or external energy supply membrane technologies is highlighted. Furthermore, DMP distinctive configurations and operational factors are explored and the prospects of integrating them into the wastewater treatment plants are recommended.

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Nitrate removal from natural water by coupling adsorption and Donnan dialysis

Cited by 10 publications

References 25 publications

High Selectivities among Monovalent Cations in Dialysis through Cation-Exchange Membranes Coated with Polyelectrolyte Multilayers

High Selectivities among Monovalent Cations in Dialysis through Cation-Exchange Membranes Coated with Polyelectrolyte Multilayers

Research on Membranes and Their Associated Processes at the Université Paris-Est Créteil: Progress Report, Perspectives, and National and International Collaborations

Donnan Membrane Process for the Selective Recovery and Removal of Target Metal Ions—A Mini Review

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