Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant
In an electrolytic water treatment, electrode reactions for pollutant removal can be easily controlled by changing an electrode potential. Thereby, it has a potential to realize an efficient water treatment process. However, its coulombic efficiency, η, strongly depends on reactant concentrations ne...
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| Format: | Article |
| Language: | English |
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Japan Society on Water Environment
2022-01-01
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| Series: | Journal of Water and Environment Technology |
| Subjects: | |
| Online Access: |
https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-053/_pdf
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| _version_ | 1797894408675262464 |
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| author | Naoyuki Kishimoto Atsuya Kitamura |
| author_facet | Naoyuki Kishimoto Atsuya Kitamura |
| author_sort | Naoyuki Kishimoto |
| collection | DOAJ |
| description | In an electrolytic water treatment, electrode reactions for pollutant removal can be easily controlled by changing an electrode potential. Thereby, it has a potential to realize an efficient water treatment process. However, its coulombic efficiency, η, strongly depends on reactant concentrations near electrodes. In a continuous electrolysis, the reactant concentrations near an electrode is lower than that in the bulk due to electrolytic consumption of reactant, which gives a negative impact on the η. Therefore, an introduction of intermittent electrolysis instead of the conventional continuous one was discussed in this research, where the reactant concentration near the electrode is recovered during the electrolysis-off stage. The intermittent electrolysis of 1 mM formic acid solution revealed that the η of formic acid removal under electrolysis-on/off time cycle of 1/10 s was 3.3 times higher than that under the continuous electrolysis. A popular technique to keep the reactant concentration near the electrode is an increase in the linear velocity of solution on the electrode. However, the η at a linear velocity of 20 cm/s was only ≤ 25% higher than that at 10 cm/s. Thus, the intermittent electrolysis was very effective in enhancing the energy-efficiency of electrolytic water treatment. |
| first_indexed | 2024-04-10T07:08:34Z |
| format | Article |
| id | doaj.art-9369aadb58074c50bc293f38b79f4109 |
| institution | Directory Open Access Journal |
| issn | 1348-2165 |
| language | English |
| last_indexed | 2024-04-10T07:08:34Z |
| publishDate | 2022-01-01 |
| publisher | Japan Society on Water Environment |
| record_format | Article |
| series | Journal of Water and Environment Technology |
| spelling | doaj.art-9369aadb58074c50bc293f38b79f41092023-02-27T01:41:19ZengJapan Society on Water EnvironmentJournal of Water and Environment Technology1348-21652022-01-0120512813610.2965/jwet.22-05310.2965/jwet.22-053Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic PollutantNaoyuki Kishimoto0Atsuya Kitamura1 Faculty of Advanced Science and Technology, Ryukoku University, Otsu, Japan Graduate School of Science and Technology, Ryukoku University, Otsu, Japan In an electrolytic water treatment, electrode reactions for pollutant removal can be easily controlled by changing an electrode potential. Thereby, it has a potential to realize an efficient water treatment process. However, its coulombic efficiency, η, strongly depends on reactant concentrations near electrodes. In a continuous electrolysis, the reactant concentrations near an electrode is lower than that in the bulk due to electrolytic consumption of reactant, which gives a negative impact on the η. Therefore, an introduction of intermittent electrolysis instead of the conventional continuous one was discussed in this research, where the reactant concentration near the electrode is recovered during the electrolysis-off stage. The intermittent electrolysis of 1 mM formic acid solution revealed that the η of formic acid removal under electrolysis-on/off time cycle of 1/10 s was 3.3 times higher than that under the continuous electrolysis. A popular technique to keep the reactant concentration near the electrode is an increase in the linear velocity of solution on the electrode. However, the η at a linear velocity of 20 cm/s was only ≤ 25% higher than that at 10 cm/s. Thus, the intermittent electrolysis was very effective in enhancing the energy-efficiency of electrolytic water treatment. https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-053/_pdf intermittent electrolysiscontinuous electrolysiscoulombic efficiencyelectrochemical oxidationformic acid |
| spellingShingle | Naoyuki Kishimoto Atsuya Kitamura Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant Journal of Water and Environment Technology intermittent electrolysis continuous electrolysis coulombic efficiency electrochemical oxidation formic acid |
| title | Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant |
| title_full | Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant |
| title_fullStr | Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant |
| title_full_unstemmed | Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant |
| title_short | Effect of Intermittent Electrolysis on Electrolytic Removal of an Organic Pollutant |
| title_sort | effect of intermittent electrolysis on electrolytic removal of an organic pollutant |
| topic | intermittent electrolysis continuous electrolysis coulombic efficiency electrochemical oxidation formic acid |
| url |
https://www.jstage.jst.go.jp/article/jwet/20/5/20_22-053/_pdf
|
| work_keys_str_mv | AT naoyukikishimoto effectofintermittentelectrolysisonelectrolyticremovalofanorganicpollutant AT atsuyakitamura effectofintermittentelectrolysisonelectrolyticremovalofanorganicpollutant |