Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle
This study aimed to improve the speed of the electrochemical process by graphene oxide nanoparticle as a current accelerator in Acid Blue 25 removal from aqueous solutions. To do so, the effect of different parameters including pH, dye concentration, sodium persulfate concentration, the ratio of sod...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2021-05-01
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| Series: | Water Science and Technology |
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| Online Access: | http://wst.iwaponline.com/content/83/9/2169 |
| _version_ | 1818897372366766080 |
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| author | Bita Ayati Zeinab Ghorbani |
| author_facet | Bita Ayati Zeinab Ghorbani |
| author_sort | Bita Ayati |
| collection | DOAJ |
| description | This study aimed to improve the speed of the electrochemical process by graphene oxide nanoparticle as a current accelerator in Acid Blue 25 removal from aqueous solutions. To do so, the effect of different parameters including pH, dye concentration, sodium persulfate concentration, the ratio of sodium persulfate to iron (II) sulfate concentration, current density, and the distance between electrodes was investigated on dye removal. Under optimal conditions of pH = 5, dye concentration = 200 mg/L, sodium persulfate concentration = 500 mg/L, iron (II) sulfate concentration = 100 mg/L, current density = 16.67 mA/cm2, and electrode distance = 2 cm, 95% of dye was removed after 60 min in the electro-activated persulfate process; while the modified electro-activated persulfate process achieved 95% dye removal after only 40 min under the same conditions. This system was able to remove 90% of dye after 60 min at a higher concentration (300 mg/L). Also, the modified electro-activated persulfate process obtained the removal of 80% of COD, and 54% of TOC after 180 min in the mentioned conditions, for the dye concentration of 300 mg/L. HIGHLIGHTS
Geraphene oxide nanoparticles raised the reaction rate by 17% by increasing the conductivity.;
The increase in conductivity, decreased the energy consumption by 50%.;
More 100 mg/L dye can be removed by the modified system.;
The oxidation state reduction made the dye structure simpler with less toxicity.; |
| first_indexed | 2024-12-19T19:15:08Z |
| format | Article |
| id | doaj.art-ddf09fe93234490bb87c800f4ec59334 |
| institution | Directory Open Access Journal |
| issn | 0273-1223 1996-9732 |
| language | English |
| last_indexed | 2024-12-19T19:15:08Z |
| publishDate | 2021-05-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Science and Technology |
| spelling | doaj.art-ddf09fe93234490bb87c800f4ec593342022-12-21T20:09:10ZengIWA PublishingWater Science and Technology0273-12231996-97322021-05-018392169218210.2166/wst.2021.128128Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticleBita Ayati0Zeinab Ghorbani1 Civil and Environmental Engineering Faculty, Tarbiat Modares University, P.O. Box 14115-397, Tehran, Iran Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran This study aimed to improve the speed of the electrochemical process by graphene oxide nanoparticle as a current accelerator in Acid Blue 25 removal from aqueous solutions. To do so, the effect of different parameters including pH, dye concentration, sodium persulfate concentration, the ratio of sodium persulfate to iron (II) sulfate concentration, current density, and the distance between electrodes was investigated on dye removal. Under optimal conditions of pH = 5, dye concentration = 200 mg/L, sodium persulfate concentration = 500 mg/L, iron (II) sulfate concentration = 100 mg/L, current density = 16.67 mA/cm2, and electrode distance = 2 cm, 95% of dye was removed after 60 min in the electro-activated persulfate process; while the modified electro-activated persulfate process achieved 95% dye removal after only 40 min under the same conditions. This system was able to remove 90% of dye after 60 min at a higher concentration (300 mg/L). Also, the modified electro-activated persulfate process obtained the removal of 80% of COD, and 54% of TOC after 180 min in the mentioned conditions, for the dye concentration of 300 mg/L. HIGHLIGHTS Geraphene oxide nanoparticles raised the reaction rate by 17% by increasing the conductivity.; The increase in conductivity, decreased the energy consumption by 50%.; More 100 mg/L dye can be removed by the modified system.; The oxidation state reduction made the dye structure simpler with less toxicity.;http://wst.iwaponline.com/content/83/9/2169acid blue 25electrochemical processenergy consumptionferrous iongraphene oxide nanoparticle |
| spellingShingle | Bita Ayati Zeinab Ghorbani Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle Water Science and Technology acid blue 25 electrochemical process energy consumption ferrous ion graphene oxide nanoparticle |
| title | Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle |
| title_full | Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle |
| title_fullStr | Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle |
| title_full_unstemmed | Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle |
| title_short | Enhancement of the electro-activated persulfate process in dye removal using graphene oxide nanoparticle |
| title_sort | enhancement of the electro activated persulfate process in dye removal using graphene oxide nanoparticle |
| topic | acid blue 25 electrochemical process energy consumption ferrous ion graphene oxide nanoparticle |
| url | http://wst.iwaponline.com/content/83/9/2169 |
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