Utilization of Sodium Chloride Solutions to Obtain Ferrous Chlorides

Shabliy, Tetyana; Gomelya, Mykola; Kryzhanovska, Yana; Levytska, Olena

doi:10.12911/22998993/126966

Cited by 2 publications

(5 citation statements)

References 16 publications

(28 reference statements)

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“…2, the level of water hardness in permeate gradually increases with an increase in the degree of permeate selection. 5), sulfates (6), alkalinity (7) when filtering artesian water (H = 8.72 mg-eq/dm 3 , С Ca 2+ = 6.24 mg-eq/dm 3 ; A = 8.08 mg-eq/dm 3 ; С Cl -= 11.34 mg/dm 3 ; С SO4 2-= 10.10 mg/dm 3 ; рН = 7.67) (Р р = 3 atm) (V = 11 dm 3 , V n = 1 dm 3 ) However, even with the selection of 90% of the permeate, the hardness of the water did not exceed 0.34 mg-eq/dm 3 . A similar trend was observed when the alkalinity of permeate changed.…”

Section: Resultsmentioning

confidence: 99%

“…The use of ion exchange in water softening processes allows working within a wide range of pH of the solution and reaching a given depth of water softening [Lubavina et al 2007;Shabliy et al 2010]. The disadvantage of the method is the formation of significant volumes of liquid waste during the regeneration of cationites with a level of mineralization.…”

Section: Introductionmentioning

confidence: 99%

“…Figure1. Change in performance (j)(1) and selectivity (R) (2; 3; 4; 5; 6; 7) of the low-pressure reverse osmosis membrane Filmtec TW30-1812-50 for hardness (2), calcium (3), magnesium ions (4), chlorides (5), sulfates(6), alkalinity(7) when filtering artesian water (H = 8.72 mg-eq/dm3 , С Ca 2+ = 6.24 mg-eq/dm3 ; A = 8.08 mg-eq/dm3 ; С Cl -= 11.34 mg/dm 3 ; С SO4 2-= 10.10 mg/dm 3 ; рН = 7.67) (Р р = 3 atm) (V = 11 dm 3 , V n = 1 dm 3 )…”

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confidence: 99%

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Application of Low-Pressure Reverse Osmosis Membranes for Drinking Water Softening

Gomelya¹,

Shabliy²,

Radovenchyk³

et al. 2023

Ecol. Eng. Environ. Technol.

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The processes of water purification with increasing selection of permeate were studied, considering selectivity and productivity of membranes, dynamics of changes of contents of components in the concentrate. It is shown that when chlorides and sulfates are removed from water, the increase in their content in the concentrate does not differ practically from the measured and calculated values. At the same time, the nature of dependences on the change in hardness, concentration of calcium and magnesium ions, alkalinity obtained experimentally differ significantly from the dependences obtained by theoretical calculations at permeate selection levels of > 70%. А significant difference in the determined and calculated concentrations of hardness ions in the concentrates was observed after hardness values greater than 30-40 mg-eq/dm 3 . This indicates the partial removal of hardness ions and carbonates from the concentrates, which may be the reason for the formation of deposits on the membrane. Permissible values of the degree of permeate selection were determined, at which there is no intense deposition of carbonates and hydroxides of hardness ions on the membrane. With the initial water hardness > 8 mg-eq/dm 3 , the degree of permeate selection could reach 60-70% without the risk of sedimentation on the membrane. Effectiveness of the low-pressure reverse osmosis membrane in the purification of mine water with an increased level of mineralization and hardness was determined. A significant difference between the determined and calculated hardness in concentration was observed already at the degree of permeate selection of 22-33%.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Application of Low-Pressure Reverse Osmosis Membranes for Drinking Water Softening

Gomelya¹,

Shabliy²,

Radovenchyk³

et al. 2023

Ecol. Eng. Environ. Technol.

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“…Paper [8] shows that even with complex use, recently developed methods of removing ions from water, including ion 3 and an H 2 SO 4 compound concentration of 300-2100 mg-equiv/dm 3 . A plate made of stainless steel was used as the cathode, and a plate made of titanium covered with ruthenium oxide and lead was used as the anode.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…An effective way to optimize the use of electrolysis processes is to conduct it to obtain products ready for further use -reactive mixtures, acid solutions, etc. [8,16].…”

Section: % Was Obtained When Using a Three-chamber Electrolyzer With ...mentioning

confidence: 99%

Devising a comprehensive technology for treating industrial iron sulfate-containing effluents of galvanic production

Dovholap,

Gomelya,

Ivanenko

et al. 2023

EEJET

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The object of the research is complex electrochemical and ferritic decontamination of iron sulfate-containing waters. Processing of liquid waste is carried out by electrochemical treatment using two- and three-chamber electrolyzers. This paper investigates the processes of electrodialysis purification of simulated solutions with an FeSO4 compound concentration of 5 g/dm3 and an H2SO4 compound concentration of 300–2100 mg-equiv/dm3. A plate made of stainless steel was used as the cathode, and a plate made of titanium covered with ruthenium oxide and lead was used as the anode. It is shown that the highest current yield of electrodialysis products of 84.5 % was obtained when using a three-chamber electrolyzer with MA-41 anion exchange membranes. It was found that when using the specified electrolyzer, the concentration gradient, the value of which is directly proportional to the difference in the concentrations of the initial solutions filled with the electrode chambers, has a significant effect on the process of separation of impurities. It is shown that for a two-chamber electrolyzer, the current output reaches 72 %, which is explained by the harmful effect of a significant concentration gradient and is manifested in the rapid mechanical blocking of the membrane and the slowing down of the ion migration process, as well as the increase in energy consumption. In a two-chamber electrolyzer, H2SO4 with a concentration of 18.3 % was obtained, which is suitable for repeated use in etching baths. It was found that as a result of electrodialysis separation and additional oxidation, it is advisable to use concentrated iron sulfate solutions for obtaining ferrite material of a crystalline structure with particle sizes of 2–20 μm. Within the framework of the circular economy, an ecologically safe technology for decontamination of industrial iron-containing sulfate solutions of galvanic production using a complex of electrodialysis and ferrite methods is proposed

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Utilization of Sodium Chloride Solutions to Obtain Ferrous Chlorides

Cited by 2 publications

References 16 publications

Application of Low-Pressure Reverse Osmosis Membranes for Drinking Water Softening

Application of Low-Pressure Reverse Osmosis Membranes for Drinking Water Softening

Devising a comprehensive technology for treating industrial iron sulfate-containing effluents of galvanic production

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