Determination of Membrane Protein Fouling by UV Spectroscopy and Electrochemical Impedance Spectroscopy

Şengür-Taşdemir, Reyhan; Guler, Zeliha; Sarac, A. Sezai̇; Koyuncu, İsmail

doi:10.1080/03602559.2017.1300816

Cited by 17 publications

(10 citation statements)

References 37 publications

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“…ohmic resistance due to the presence of an electrolyte within the membranes and in solution. It has been shown, that more porous membrane morphology leads to higher R s , 37 thus the control samples (untreated and treated) showed similar values. In contrast, there is a significant increment from the Fouled membrane, 16.49 Ω, to the F-treated 192.8 Ω, and this suggests that the pores at the F-treated become exposed and unclog after the electrical treatment.…”

Section: ■ Results and Discussionmentioning

confidence: 79%

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Cruz-Tato

Rivera-Fuentes

Flynn

et al. 2019

ACS Appl. Polym. Mater.

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Forward osmosis (FO) has been emerging and gaining attention within the membrane-based processes because it can achieve high water fluxes while minimizing energy consumption, making it a cost-effective approach for wastewater treatment. However, membrane fouling remains an obstacle to this application. To address this concern, we fabricated an electroconductive membrane composed of polysulfone and polyaniline (PAni). These membranes have the potential to oxidize targeted organic compounds and/or electrostatically remove the fouling layer. After optimizing the PAni loading, we performed bench-scale tests using sodium alginate as model foulant. The membranes were fouled resulting in a decrease in FO efficiency of 72%. Fouled membranes were treated with a cathodic potential for 30 min, the fouling and antifouling processes were monitored with scanning electron microscopy (SEM), and contact angle and electrochemical methods were used. The fouled membrane exhibited a clogged surface and high electrical resistance, while the treated membrane recovered the PAni nanofibers morphology, its electrical and hydrophilic properties, and 84% of its FO efficiency. Thus, PAni can improve the overall membrane permeability while incorporating antifouling properties. Moreover, the EIS results of this study shed light on the mechanisms that govern the water separation process before and after fouling in the FO mode.

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Section: ■ Results and Discussionmentioning

confidence: 79%

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Cruz-Tato

Rivera-Fuentes

Flynn

et al. 2019

ACS Appl. Polym. Mater.

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“…It was noted that the Q SDBS values of PM and PDA-M were much greater than that of GO-M. As reported in the literature, different surface structures could affect the formation of the fouling layer and the electrochemical properties between the interface of the membrane and the solution. 35,36 It was reported in our previous work that PM and PDA-M had more smooth and denser surfaces than GO-M. Thus, for PM, PDA-M, and GO-M, it might be the differences in roughness and surface structure that caused the different capacitances of the fouling layer.…”

Section: Membrane Fouling Characterization By Eismentioning

confidence: 90%

Anion Exchange Nanocomposite Membranes Modified with Graphene Oxide and Polydopamine: Interfacial Structure and Antifouling Applications

Shi

Cao

et al. 2020

ACS Appl. Nano Mater.

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In this work, electrochemical impedance spectroscopy (EIS) was utilized to probe interfacial structures of antifouling anion exchange membranes (AEMs) with different modifying architectures fabricated by graphene oxide (GO) and polydopamine (PDA). Results showed that the GO@PDA modified AEMs with a compact GO@PDA layer exhibited a new interface between the modifying layer and membrane matrix, different from the loose GO-modified AEMs. After fouling experiments, from quantifying electrical equivalent circuits fitted to EIS results, it could be found that GO-modified AEMs and PDA-modified AEMs exhibited a significant foulants layer, although the modifying layer reduced the amount of foulants absorbed in the membrane matrix. For GO@PDA-modified AEMs, the increase in ohmic resistance and the foulants layer was almost negligible. Only a small amount of foulants accumulating on the GO@PDA layer affected the capacitive resistance of the interfacial layer obviously. It was concluded that the electrochemical properties and interface of modified AEMs was influenced by the structure of modifying layer, and a dense and compact modifying layer could be more effective to block the foulants from depositing on the surface of AEMs and entering the membrane matrix. The electrochemical characterizations helped to elucidate the antifouling mechanism of modified AEMs with different structures and get a good understanding of the correlation among the properties, structures, and antifouling performance of the modifying layer.

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“…The counter electrodes are often made up of conducting materials with high conductivity such as gold [ 103 ] and silver. [ 105 ] Depending on the analytes, the working electrode can use either the same or different material from the counter electrodes. For instance, a gold working electrode is used for detecting dissolved oxygen, whereas a carbon electrode is used for detecting the pH of a solution.…”

Section: Printed Electrodes For Eismentioning

confidence: 99%

“…[ 103 ] For applications like membrane fouling detection, the working electrode can be the membrane filter with platinum wire and silver wire as counter and reference electrodes respectively. [ 105 ] Besides, three‐electrode systems have also found applications in biosensor, neuromuscular cartography, and electrochemical cells (Figure 5b–d).…”

Section: Printed Electrodes For Eismentioning

confidence: 99%

Potential of Printed Electrodes for Electrochemical Impedance Spectroscopy (EIS): Toward Membrane Fouling Detection

Goh

Tay

Lee

et al. 2021

Adv Elect Materials

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Electrochemical impedance spectroscopy (EIS), one of the techniques for electrochemical analysis, has been used for a wide range of applications especially chemical‐ and bio‐sensing. Besides, EIS is one of the few techniques that has been proven useful for membrane fouling detection. Electrodes are some of the most essential components for analytes detection applications with EIS. With the advances in printing technology, the fabrication of advanced printed electrode systems with miniature designs and improved sensitivity for electrochemical sensing is made possible. This review addresses recent advances in printed electrodes for electrochemical impedance spectroscopy with the emphasis placed on discussing the use of printed electrodes for membrane fouling detection. Common electrode designs and materials for electrochemical impedance spectroscopy are discussed, along with practical examples of these printed electrodes. The commonly used printing techniques for the fabrication of printed electrodes are also deliberated. The successful realization of printed electrodes for EIS requires careful design of electrodes, proper selection of electrode materials, as well as optimization of the printing process. It is expected that printed electrodes will be widely accepted for EIS sensing applications and will facilitate the creation of low‐cost high‐performance sensing devices.

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Determination of Membrane Protein Fouling by UV Spectroscopy and Electrochemical Impedance Spectroscopy

Cited by 17 publications

References 37 publications

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Anti-Fouling Electroconductive Forward Osmosis Membranes: Electrochemical and Chemical Properties

Anion Exchange Nanocomposite Membranes Modified with Graphene Oxide and Polydopamine: Interfacial Structure and Antifouling Applications

Potential of Printed Electrodes for Electrochemical Impedance Spectroscopy (EIS): Toward Membrane Fouling Detection

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