Streaming potential properties of ceramic nanofiltration membranes – Importance of surface charge on the ion rejection

Árki, Pál; Hecker, Christine; Tomandl, G.; Joseph, Yvonne

doi:10.1016/j.seppur.2018.11.054

Cited by 31 publications

(9 citation statements)

References 12 publications

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“…On the contrary, positively charged promotes foulants adsorption on the membrane surface and/or inside its pores. These findings are in agreement with results presented in References [76,103,104], where authors have shown that the IEP of titanium oxide membranes is located at pH equal to around 6.…”

Section: Impact Of Feed Ph On the Permeate Fluxsupporting

confidence: 93%

“…Also, they hold excellent acid and alkali tolerance [69,70], thus they can be regenerated by various chemical products. In addition, as described in References [68,[71][72][73][74][75][76][77][78], ceramic membranes have mechanical and thermal resistance which allows to perform filtration processes under severe operational conditions (high transmembrane pressure, feed flow rate and temperature) as well as enables an aggressive membrane cleaning. Finally, although generally ceramic membranes are more expensive than polymer membranes [63], they show longer service life with much reduced maintenance [79].…”

Section: Introductionmentioning

confidence: 99%

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Clarification of 1,3-Propanediol Fermentation Broths by Using a Ceramic Fine UF Membrane

Tomczak

Gryta

2020

Membranes

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This work examined the use of a ceramic fine ultrafiltration (UF) membrane for the pre-treatment of 1,3-propanodiol (1,3-PD) fermentation broths. It has been demonstrated that the membrane used provides obtaining a high-quality, sterile permeate, which can be sequentially separated by other processes such as nanofiltration (NF) and membrane distillation (MD). Special attention was paid to the impact of the operational parameters on the membrane performance. The series of UF experiments under transmembrane pressure (TMP) from 0.1 to 0.4 MPa and feed flow rate (Q) from 200 to 400 dm3/h were performed. Moreover, the impact of the feed pH, in the range from 5 to 10, on the flux was investigated. It has been demonstrated that for fine UF, increasing the TMP is beneficial, and TMP equal to 0.4 MPa and Q of 400 dm3/h ensure the highest flux and its long-term stability. It has been shown that in terms of process efficiency, the most favorable pH of the broths is equal to 9.4. An effective and simple method of membrane cleaning was presented. Finally, the resistance-in-series model was applied to describe resistances that cause flux decline. Results obtained in this study can assist in improving the cost-effectiveness of the UF process of 1,3-PD fermentation broths.

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Section: Impact Of Feed Ph On the Permeate Fluxsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Clarification of 1,3-Propanediol Fermentation Broths by Using a Ceramic Fine UF Membrane

Tomczak

Gryta

2020

Membranes

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“…While many small‐scale pilot plants using commercial NF ceramic membranes have been built, with the largest in Canada at an overall membrane area of 234 m, 2[ 20 ] larger pilot plants were not considered, due to the high cost of NF ceramic membranes. [ 21 ] Obviously, the high cost of building an NF ceramic plant will not be justified unless the value of the product can exceed the cost. Thus, higher‐value applications should be considered to offset the cost of such membranes.…”

Section: Water Scarcity Desalination and Lithium Recoverymentioning

confidence: 99%

“…[ 9 ] Raising the salt concentration poses growing challenges because this will increase the ionic strength of the solution, compress the electrochemical double layer, and weaken the ion rejection via Donnan exclusion. [ 21 ] For example, an increase in the NaCl concentration from 300, 2000, to 5000 mg L −1 would reduce the NaCl rejection efficiency from 65, 35, to 12%, respectively (Figure 2a ). [ 16 , 23 ] A similar concentration dependency on the salt rejection can also be observed for MgCl 2 and LiCl (Figure 2b,c ).…”

Section: Current Progress and Mechanismsmentioning

confidence: 99%

Nanofiltration Ceramic Membranes as a Feasible Two‐Pronged Approach toward Desalination and Lithium Recovery

Kirk,

Chong,

Wang

et al. 2024

Global Challenges

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Ceramic membranes are taking center stage for separation technologies in water treatment. Among them, ceramic nanofiltration membranes are at the forefront of membrane technologies. The desalination of seawater using ceramic nanofiltration membranes is a potential application toward increasing the global water supply and tackling water scarcity. However, while the high fabrication cost poses a challenge to their large‐scale applications, high‐value separation applications can help to offset the overall cost. In this regard, ceramic nanofiltration membranes can also be explored as a viable option for high‐value lithium extraction from the waste seawater brine. In order to determine the potential of nanofiltration ceramic membranes for desalination and lithium recovery from seawater, the current efficiency of salt rejection across various operation parameters must be thoroughly evaluated. Specifically, the interactions between the Donnan exclusion, steric exclusion, zeta potential, and salt concentration play an important role in determining the salt rejection efficiency. Several strategies are then proposed to guide ceramic nanofiltration membranes toward potentially practical applications regarding desalination and lithium recovery.

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“…In addition, it is proved the charge density of the solid surface varies with the solution properties such as pH, ionic strength, temperature, etc. [34‐36]. However, this study focuses on identifying the causes of the ICP and the effects of the ICP on the performance of the EK battery.…”

Section: Model Developmentmentioning

confidence: 99%

A numerical study on ion concentration polarization and electric circuit performance of an electrokinetic battery

et al. 2020

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A numerical study on ion concentration polarization and electric circuit performance of an electrokinetic batteryIon concentration polarization (ICP) imposes remarkable adverse effects on the energy conversion performance of the pressure-driven electrokinetic (EK) flows through a capillary system that can be equivalently treated as a battery. An optimized dimensionless numerical method is proposed in this study to investigate the causes and the effects of the ICP. Results show that remarkable ICP phenomena are induced under certain conditions such as high applied pressure, high surface charge density, and small inversed Debye length at dimensionless values of 6000, -10, and 0.5. Meanwhile, different factors influence the ICP and the corresponding electric properties in different ways. Particularly for the overall electric resistance, the applied pressure and the surface charge density mainly affect the variation amplitude and the level of the overall electric resistance when varying the output electric potential, respectively. Differently, the Debye length affects the overall electric resistance in both aspects. Ultimately, the induced ICP leads to significant nonlinear current-potential curves.

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Streaming potential properties of ceramic nanofiltration membranes – Importance of surface charge on the ion rejection

Cited by 31 publications

References 12 publications

Clarification of 1,3-Propanediol Fermentation Broths by Using a Ceramic Fine UF Membrane

Clarification of 1,3-Propanediol Fermentation Broths by Using a Ceramic Fine UF Membrane

Nanofiltration Ceramic Membranes as a Feasible Two‐Pronged Approach toward Desalination and Lithium Recovery

A numerical study on ion concentration polarization and electric circuit performance of an electrokinetic battery

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