Chromic acid recovery by electro-electrodialysis

Frenzel, I.; Holdik, H.; Stamatialis, Dimitrios; Pourcelly, G.; Weßling, Matthias

doi:10.1016/j.seppur.2005.06.002

Cited by 28 publications

(6 citation statements)

References 4 publications

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“…By generating redox species at the electrodes, it is then possible to further modulate the products obtained in the recovery compartment. Traditional EED applications include organic/inorganic acid purification and recovery as well as hydrogen iodide (HI) concentration for hydrogen production [ 4 , 128 , 182 , 183 ]. Although the idea of using EED as part of the thermochemical water-splitting process for hydrogen production goes back to the early 1980s [ 183 ], modern interest for renewable and sustainable energies led researchers to constantly innovate in order to improve this process [ 184 ].…”

Section: Recent Technological Developments Based On Ed Membrane Phmentioning

confidence: 99%

“…While PVSU CEMs allowed a near 100%-current efficiency, it was shown that the high concentration of fixed charges in the membrane matrices significantly reduced the energy consumption required to produce 1 mol H 2 . The stability of AEMs, mainly used for organic and inorganic acid purification, is a significantly higher hurdle compared to CEMs [ 182 ]. The reasons for it are the chloromethylation and quaternization steps during AEM production process which remain technically challenging [ 186 ].…”

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%

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

Bazinet

Geoffroy

2020

Membranes

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“…In most cases, among others in plating industry, so-called three-compartment electro-electrodialysis (EED) is applied. It is based on the electrolysis reactions running on electrodes and the electrodialysis process [53] (Fig. 4).…”

Section: Ion Exchange Membrane Processesmentioning

confidence: 99%

“…It can simultaneously manage three different tasks: removal of impurities, chromic acid recovery and purification of rinse water. Treated solution feeds center chamber of the device, which is separated from the anolite chamber by the anion exchange membrane and from the catolite chamber by the cation exchange membrane [53]. The anolite chamber is supplied with water, while the catolite chamber with sulphuric acid.…”

Section: Ion Exchange Membrane Processesmentioning

confidence: 99%

Inorganic Micropollutants Removal by Means of Membrane Processes - State of the Art

Bodzek¹

2013

Ecological Chemistry and Engineering S

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A number of inorganic anions and metals, especially heavy metals, at certain conditions, have been found in potentially harmful concentrations in numerous water sources. The maximum permissible levels of these compounds, in drinking water and wastewaters discharged to environment, set by the WHO and a number of countries are very low (from µg/dm 3 to a few mg/dm 3 ). Several common treatment technologies, which are nowadays used for removal of inorganic contaminants from natural water supplies, represent serious exploitation problems. Membrane processes such as reverse osmosis and nanofiltration, ultrafiltration and microfiltration in integrated systems, Donnan dialysis and electrodialysis as well as membrane bioreactors, if properly selected, offer the advantage of producing high quality drinking water without inorganic substances as well as purified wastewater which can be drained off to natural water sources.

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“…25,26 These processes compared with traditional wastewater treatment processes provide some advantages such as high quantity of treated wastewater, high removal efficiency, fouling control, low energy consumption, and lower back-washing time. 20,21,27 The removal of heavy metals from aqueous waste streams by membrane processes was realized by reverse osmosis (RO), 28 nanofiltration (NF) 29,30 electrodialysis (ED), 31,32 and micellarenhanced ultrafiltration (MEUF). [33][34][35][36] These processes are separately applied according to the general treatment aims, but NF, RO, and MEUF processes are generally preferred in real wastewater treatment applications.…”

Section: Introductionmentioning

confidence: 99%

Nickel Removal from Waters Using Surfactant-Enhanced Hybrid PAC/MF Process. I. The Influence of System-Component Variables

Aydıner

Kara

Keskinler

et al. 2006

Ind. Eng. Chem. Res.

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This study takes aim at exploring the effectiveness of a surfactant-added powdered activated carbon/microfiltration (PAC/MF) hybrid process in the removal of nickel ions from water and wastewater as a promising technology. For this aim, the influence of system-component variables related to membrane material and pore size, and adsorbent and surfactant types was investigated. Nickel rejection (R M), surfactant rejection (R S), and steady-state flux (J*) were taken into account for more elaborately assessing the technical performance of the process. It was determined that the use of a surfactant in this process is justified only above the critical micellar concentration (CMC). Despite the increasing of nickel rejection with the addition of surfactant into the hybrid membrane process, a considerable decrease in steady-state flux is a major drawback of process. The flux decline observed was strongly dependent on surfactant type. This was interpreted as being due to a secondary membrane layer formed by surfactant micelles on the surface and within the membrane pores. The flux decline could also be related to PAC layer formation. Membrane, adsorbent, and surfactant types seem to have the highest relative influence on R M, R S, and J*, respectively. As a conclusion, surfactant type and membrane pore size were established as having the biggest and the smallest total influence on process performance, respectively.

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Chromic acid recovery by electro-electrodialysis

Cited by 28 publications

References 4 publications

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

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

Inorganic Micropollutants Removal by Means of Membrane Processes - State of the Art

Nickel Removal from Waters Using Surfactant-Enhanced Hybrid PAC/MF Process. I. The Influence of System-Component Variables

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