Structural effects on electrosorptive behavior of aromatic organic acids from aqueous solutions onto activated carbon cloth electrode of a flow-through electrolytic cell

Bayram, Edip; Ayrancı́, Erol

doi:10.1016/j.jelechem.2012.07.028

Cited by 17 publications

(9 citation statements)

References 25 publications

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“…Voltammograms given in Figure 2b show that there is no Faradaic reactions taking place with BA or NA within a wide potential range. Comparing with the voltammogram of Na 2 SO 4 solution, the observed increases in voltammetric response starting from the 0.7 V to the 1.2 V in the voltammograms of BA and NA solutions are arise from the electrosorption of adsorbates as indicated previously [13].…”

Section: Resultssupporting

confidence: 62%

Electrosoption of Aromatic Organic Acids From Aqueous Solutions Onto Granular Activated Carbon Electrodes for Water Purification

Bayram¹

2016

HJBC

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Ö Z E T S u arıtma sistemleri, artan insan nüfusu ve çevre kirliliği sonucunda oldukça önemli hale gelmiştir. Bu çalışmada, benzoik asit (BA) ve nikotinik asitin (NA) sulu çözeltilerinden, aktiflenmiş karbon elektrotlar (ACEs) üzerine elektrosorpsiyon yolu ile uzaklaştırılmaları incelenmiştir. ACEs, endüstriyel olarak elde edilebilen granüllü aktiflenmiş karbon ve polietilen bağlayıcı kullanılarak üretilmiştir. Elektrosorpsiyon sırasında organik moleküllerin derişimlerinde oluşan değişimler, online UV-Vis spektrofotometrik sistem kullanılarak takip edilmiştir. BA nın elektrosorsiyonu üzerine uygulanan potansiyel ve çözelti akış hızı gibi sistem parametrelerinin etkileri incelenmiştir. Optimum proses parametrelerinin, çözelti akış hızı için 60 mL.dk -1 ve ACEs polarizasyonu için 1.5 V olduğu bulunmuştur. BA ve NA içeren ikili karışımların elektrosorpsiyon davranışları da incelenmiştir. BA ve NA nın aktiflenmiş karbon elektrotlar kullanılarak sulu çözeltilerinden elektrosorpsiyon ile etkili bir şekilde uzaklaştırılabileceği sonucuna varılmıştır. Anahtar KelimelerAktiflenmiş karbon elektrot, elektrosorpsiyon, aromatik organik asitler, su arıtma. A B S T R A C TW aste water treatment systems have great importance as a result of the increasing population and environmental pollution. In this study, electrosorptive removal of benzoic acid (BA) and nicotinic acid (NA) from aqueous solutions onto activated carbon electrodes (ACEs) were studied. ACEs were fabricated from the industrially available granular activated carbon and polyethylene as binder. During the electrosorption process, the change in concentration of organic molecules was followed by using an online UV-Vis spectrophotometric system. Effects of operational parameters such as applied potential and volumetric flow rate on electrosorption of BA were examined. Optimum parameters for the process were found to be 60 mL.min -1 for volumetric flow rate and 1.5 V for polarization of ACEs. Electrosorption of binary mixtures of BA and NA was also studied. it can be concluded that BA and NA can be effectively removed by electrosorption from aqueous solutions using activated carbon electrodes.

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Section: Resultssupporting

confidence: 62%

Electrosoption of Aromatic Organic Acids From Aqueous Solutions Onto Granular Activated Carbon Electrodes for Water Purification

Bayram¹

2016

HJBC

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“…Similarly, the electrosorption of BA was lower at a basic pH than at an acidic pH, which was ascribed to the competition between the benzoate (formed at basic pH) and OHˉ anions for the positively charged ACC anode material (Bayram and Ayranci, 2012a). A similar trend was obtained with the electrosorption of thiocyanate (pKa = 0.5) Xien, 2009, 2005), benzene (pKa = 43) (Heiland et al, 1966), naphthalenesulfonic acid (pKa = 0.2), benzyl alcohol (pKa = 15.4), naphthoic acid (pKa = 4.2), methylquinolinium chloride (Bán et al, 1998) and burdem orange II (pKa = 11.4) (Gerçel, 2016) (Table 2).…”

Section: Phmentioning

confidence: 99%

“…In addition, the charge dipole and dispersion interactions between the adsorbent and the aromatic organic acids have also depicted an influence on the electrosorption. The electrosorptive behavior of aromatic organic acids (i.e., benzoic, phthalic and NA) onto the ACC electrode was further examined (Bayram and Ayranci, 2012a). The rate constants of electrosorption of the acids decreased in the following order: NA > phthalic acid > BA (Bayram and Ayranci, 2012a).…”

Section: Types Of Organic Pollutants Their Co-sorption and The Initia...mentioning

confidence: 99%

“…The electrosorptive behavior of aromatic organic acids (i.e., benzoic, phthalic and NA) onto the ACC electrode was further examined (Bayram and Ayranci, 2012a). The rate constants of electrosorption of the acids decreased in the following order: NA > phthalic acid > BA (Bayram and Ayranci, 2012a). A more recent study schematized the material/solution interface in the presence of MB sorption on a prGO/SWCNT surface (Fig.…”

Section: Types Of Organic Pollutants Their Co-sorption and The Initia...mentioning

confidence: 99%

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A critical review on the electrosorption of organic compounds in aqueous effluent – Influencing factors and engineering considerations

Lissaneddine

Pons

Aziz

et al. 2022

Environmental Research

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“…Among these are the surface charge of the carbon [14], competition between hydroxide ions and the charged molecules [15], and the pH‐dependent dissociation of the molecules [44]. Other studies focused on the improvement of the separation by modifying the electrode surface [24], by using new carbon materials [23], or by optimizing the process set‐up and parameters [12, 22]. Besides the mentioned studies specifically investigating the effect of an electrical potential onto the sorption of organic molecules, there exist also more general studies about the potential‐free adsorption of charged organic molecules onto carbon surfaces.…”

Section: Introductionmentioning

confidence: 99%

Predicting the potential of capacitive deionization for the separation of pH‐dependent organic molecules

Wagner

Winger

Franzreb

2021

Engineering in Life Sciences

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One of the main steps in the biotechnological production of chemical building blocks, such as, e.g. bio‐based succinic acid which is used for lubricants, cosmetics, food, and pharmaceuticals, is the isolation and purification of the target molecule. A new approach to isolate charged, bio‐based chemicals is by electrosorption onto carbon surfaces. In contrast to ion exchange, electrosorption does not require additional chemicals for elution and regeneration. However, while the electrosorption of inorganic salts is well understood and in commercial use, the knowledge about electrosorption of weak organic acids including the strong implications of the pH‐dependent dissociation and their affinity towards physical adsorption must be expanded. Here, we show a detailed discussion of the main pH‐dependent effects determining the achievable charge efficiencies and capacities. An explicit set of equations allows the fast prediction of the named key figures for constant voltage and constant current operation. The calculated and experimental results obtained for the electrosorption of maleic acid show that the potential‐free adsorption of differently protonated forms of the organic acid play a dominating role in the process. At pH 8 and a voltage threshold of 1.3 V, charge efficiencies of 25% and capacities around 40 mmol/kg could be reached for a constant current experiment. While this capacity is clearly below that of ion exchange resins, the required carbon materials are inexpensive and energy costs are only about 0.013 €/mol. Therefore, we anticipate that electrosorption has the potential to become an interesting alternative to conventional unit operations for the isolation of charged target molecules.

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Structural effects on electrosorptive behavior of aromatic organic acids from aqueous solutions onto activated carbon cloth electrode of a flow-through electrolytic cell

Cited by 17 publications

References 25 publications

Electrosoption of Aromatic Organic Acids From Aqueous Solutions Onto Granular Activated Carbon Electrodes for Water Purification

Electrosoption of Aromatic Organic Acids From Aqueous Solutions Onto Granular Activated Carbon Electrodes for Water Purification

A critical review on the electrosorption of organic compounds in aqueous effluent – Influencing factors and engineering considerations

Predicting the potential of capacitive deionization for the separation of pH‐dependent organic molecules

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