Decomposition and concentration of sludge water by membrane electrolysis

N. V. Vasyunina; Васюнина Н. В.; I. V. Dubova; Дубова И. В.; K. E. Druzhinin; Дружинин К. Е.; T. R. Gilmanshina; Гильманшина Т. Р.; O. Yu. Shubkina; Шубкина О. Ю.

doi:10.31857/S2218117224060098

Decomposition and concentration of sludge water by membrane electrolysis

Авторлар: Vasyunina N.V.¹, Dubova I.V.¹, Druzhinin K.E.², Gilmanshina T.R.¹, Shubkina O.Y.¹
Мекемелер:
1. Siberian Federal University
2. LLC “Indust-PRO”
Шығарылым: Том 14, № 6 (2024)
Беттер: 527-533
Бөлім: Articles
URL: https://cijournal.ru/2218-1172/article/view/684839
DOI: https://doi.org/10.31857/S2218117224060098
EDN: https://elibrary.ru/MAEIOR
ID: 684839

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Аннотация

The article discusses the possibility of using electrodialysis for processing weak aluminate solutions for the purpose of causticization and obtaining strong alkaline solutions is being studied. A three-chamber electrodialysis cell of our own design is described. The cell uses heterogeneous cation exchange membranes MK-40; titanium alloy VT1-0 is used as the cathode and anode material. Electrodialysis was carried out at an interpolar distance of 3–5 cm and a current density of 0.5–3.0 A/dm² to obtain cathodic (concentrated caustic alkali solution) and anodic (aluminum hydroxide and desalinated solution) products. The optimal operating parameters for the process of electrodialysis concentration of an aluminate solution were selected – the current density is about 2 A/dm² with an the interpolar distance of 4 cm. It was determined that the soda content in the solution within an hour decreases from 55 to 25–30% at various operating parameters of the electrolylysis process. The degree of concentration of total alkali in the solution at the selected process parameters after an hour reaches 1.40–1.45.

Негізгі сөздер

еlectrodialysis, sludge water, concentration of alkaline solutions, electrodialysis cell, aluminate solutions, kinetics of concentration by electrodialysis

Толық мәтін

Әдебиет тізімі

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Қосымша файлдар

Әрекет

1. JATS XML

Жүктеу

2. Fig. 1. External appearance (a) and connection diagram (b) of the experimental cell [19].

Жүктеу (252KB)

Метадеректер

3. Fig. 2. Degree of concentration (a) and percentage of soda (b) in the anode and cathode space at different process parameters. Interpolar distance, cm: 3 – ; 4 – ; 5 – .