ELECTROSYNTHESIS OF SODIUM AND POTASSIUM FERRATE FOR THE TREATMENT OF INDIGO BLUE AQUEOUS SOLUTIONS AND DENIM WASTEWATER
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2020
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| _version_ | 1876469965180108800 |
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| author | Monserrat Castañeda Juárez |
| author_facet | Monserrat Castañeda Juárez |
| contents | ELECTROSYNTHESIS OF SODIUM AND POTASSIUM FERRATE FOR THE TREATMENT OF INDIGO BLUE AQUEOUS SOLUTIONS AND DENIM WASTEWATER Monserrat Castañeda Juárez Verónica Martínez Miranda Perla Tatiana Almazán Sánchez Ivonne Linares Hernández Guadalupe Vázquez Mejía Ciencias de la Tierra oxidation coagulation flocculation textile effluent Wastewater treatment Synthetic dyes are widely used in the textile industry. It is estimated that about 2-50 %of these dyes are lost during the dying process and released in the effluents. These compounds are highly colored and can cause severe contamination of water sources. In this study, ferrate has been employed for the treatment of indigo blue aqueous solu-tions and denim wastewater. The electrosynthesis of ferrate was carried out using a 24factorial design and the optimal conditions were found: current density of 100 mA/cm2, room temperature, kind and concentration of electrolyte, NaOH 20 M. Under these conditions, 6.89 g/L (41.54 mM) of ferrate was produced. The successful synthesis of ferrate was confirmed using infrared spectroscopy, ultraviolet spectroscopy, and cyclic voltammetry. The electrosynthesized sodium ferrate (Na2FeO4)and potassium ferrate (K2FeO4) were evaluated in a jar test. The maximum dye removal percentage (> 77 %) was achieved using Na2FeO4 at a dose of 300 mg/L. In denim wastewater, the best color removal efficiency was 92.51 % using 200 mg/L of K2FeO4 at 30 min. The increased biodegradability index (0.98) after treatment by K2FeO4 confirmed that the biorefractory compounds were oxidized/removed. 2020 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37072379009 https://www.redalyc.org/journal/370/37072379009/ https://www.redalyc.org/journal/370/37072379009/html/ https://www.redalyc.org/journal/370/37072379009/37072379009.epub https://www.redalyc.org/journal/370/37072379009/movil 10.20937/RICA.53381 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.3 Vol.36 |
| format | Artículo científico |
| id | redalyc_37072379009 |
| institution | Redalyc |
| language | en |
| publishDate | 2020 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | ELECTROSYNTHESIS OF SODIUM AND POTASSIUM FERRATE FOR THE TREATMENT OF INDIGO BLUE AQUEOUS SOLUTIONS AND DENIM WASTEWATER Monserrat Castañeda Juárez Ciencias de la Tierra oxidation coagulation flocculation textile effluent Wastewater treatment ELECTROSYNTHESIS OF SODIUM AND POTASSIUM FERRATE FOR THE TREATMENT OF INDIGO BLUE AQUEOUS SOLUTIONS AND DENIM WASTEWATER Monserrat Castañeda Juárez Verónica Martínez Miranda Perla Tatiana Almazán Sánchez Ivonne Linares Hernández Guadalupe Vázquez Mejía Ciencias de la Tierra oxidation coagulation flocculation textile effluent Wastewater treatment Synthetic dyes are widely used in the textile industry. It is estimated that about 2-50 %of these dyes are lost during the dying process and released in the effluents. These compounds are highly colored and can cause severe contamination of water sources. In this study, ferrate has been employed for the treatment of indigo blue aqueous solu-tions and denim wastewater. The electrosynthesis of ferrate was carried out using a 24factorial design and the optimal conditions were found: current density of 100 mA/cm2, room temperature, kind and concentration of electrolyte, NaOH 20 M. Under these conditions, 6.89 g/L (41.54 mM) of ferrate was produced. The successful synthesis of ferrate was confirmed using infrared spectroscopy, ultraviolet spectroscopy, and cyclic voltammetry. The electrosynthesized sodium ferrate (Na2FeO4)and potassium ferrate (K2FeO4) were evaluated in a jar test. The maximum dye removal percentage (> 77 %) was achieved using Na2FeO4 at a dose of 300 mg/L. In denim wastewater, the best color removal efficiency was 92.51 % using 200 mg/L of K2FeO4 at 30 min. The increased biodegradability index (0.98) after treatment by K2FeO4 confirmed that the biorefractory compounds were oxidized/removed. 2020 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37072379009 https://www.redalyc.org/journal/370/37072379009/ https://www.redalyc.org/journal/370/37072379009/html/ https://www.redalyc.org/journal/370/37072379009/37072379009.epub https://www.redalyc.org/journal/370/37072379009/movil 10.20937/RICA.53381 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.3 Vol.36 |
| title | ELECTROSYNTHESIS OF SODIUM AND POTASSIUM FERRATE FOR THE TREATMENT OF INDIGO BLUE AQUEOUS SOLUTIONS AND DENIM WASTEWATER |
| topic | Ciencias de la Tierra oxidation coagulation flocculation textile effluent Wastewater treatment |
| url | https://www.redalyc.org/articulo.oa?id=37072379009 https://www.redalyc.org/journal/370/37072379009/ https://www.redalyc.org/journal/370/37072379009/html/ https://www.redalyc.org/journal/370/37072379009/37072379009.epub https://www.redalyc.org/journal/370/37072379009/movil |