Neutralization of Industrial Water by Electrodialysis
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Faculty of Management, AGH University of Science and Technology, 30-059 Kraków, Poland
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Department of Chemistry, Batumi Shota Rustaveli State University, Batumi, GE 6010, Georgia
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Department of Ecological Safety and Nature Protection Activity, Lviv Polytechnic National University, 79013 Lviv, Ukraine
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Department of Agroecology and Forestry, Batumi Shota Rustaveli State University, Batumi, GE 6010, Georgia
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Department of Information Systems, Kuban State Agrarian University named after I.T. Trubilin, 350044 Krasnodar, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Yoshihiko Sano
Membranes 2021, 11(2), 101; https://doi.org/10.3390/membranes11020101
Received: 19 December 2020
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Revised: 23 January 2021
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Accepted: 27 January 2021
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Published: 31 January 2021
(This article belongs to the Special Issue Advanced Membrane Technology on Desalination and Concentration)
The process of non-reagent adjustment of the pH of a NaCl solution (0.5 g/L) of different acidity was investigated by the method of bipolar electrodialysis on a device operating according to the K-system (concentration). The experiments were carried out in the range pH = 2.0–12.0 with monopolar cation-exchange MK-40 (for alkaline solutions) or anion-exchange MA-40 (for acidic solutions) and bipolar MB-2 membranes. The regularities of the change in the pH of the solution on the current density, process productivity and energy consumption for the neutralization process have been investigated. Revealed: with different productivity of the apparatus (Q = 0.5–1.5 m3/h), in the range of pH 3.0–11.0, with an increase in the current density, a neutral pH value is achieved. It has been shown that at pH above 11.0 and below 3.0, even at high current densities (i > 20 A/m2), its value cannot be changed. This is due to the neutralization of the H+ or OH− ions generated by the bipolar membrane by water ions, which are formed as a result of the dissociation of water molecules at the border of the monopolar membrane and the solution under conditions when the value of current exceeds the limiting value.
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MDPI and ACS Style
Petrov, O.; Iwaszczuk, N.; Kharebava, T.; Bejanidze, I.; Pohrebennyk, V.; Nakashidze, N.; Petrov, A. Neutralization of Industrial Water by Electrodialysis. Membranes 2021, 11, 101. https://doi.org/10.3390/membranes11020101
AMA Style
Petrov O, Iwaszczuk N, Kharebava T, Bejanidze I, Pohrebennyk V, Nakashidze N, Petrov A. Neutralization of Industrial Water by Electrodialysis. Membranes. 2021; 11(2):101. https://doi.org/10.3390/membranes11020101
Chicago/Turabian StylePetrov, Oleksandr, Natalia Iwaszczuk, Tina Kharebava, Irina Bejanidze, Volodymyr Pohrebennyk, Nunu Nakashidze, and Anton Petrov. 2021. "Neutralization of Industrial Water by Electrodialysis" Membranes 11, no. 2: 101. https://doi.org/10.3390/membranes11020101
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