Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective
Published literature describes the formation of the Fe (II)–phenanthroline complex (ferroin) as a stop way for Fenton processes, reducing radical yield. By contrast, this study presents evidence that ferroin can be activated by UVA in mildly acidic media in a photo-Fenton-like process. Because ferro...
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2021
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oai:doaj.org-article:67e3ac030cf54b26920699f130d2217c2021-11-06T11:20:19ZFerroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective0273-12231996-973210.2166/wst.2021.311https://doaj.org/article/67e3ac030cf54b26920699f130d2217c2021-09-01T00:00:00Zhttp://wst.iwaponline.com/content/84/5/1217https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Published literature describes the formation of the Fe (II)–phenanthroline complex (ferroin) as a stop way for Fenton processes, reducing radical yield. By contrast, this study presents evidence that ferroin can be activated by UVA in mildly acidic media in a photo-Fenton-like process. Because ferroin is the main waste from total iron determination in environmental samples, a recycling approach is suggested. Based on the best practices of waste management planning, an application of the proposed method for treating another chemical waste is presented. Titrimetric ammonia determination waste containing 2.67 mg L−1 methyl red azo dye and 1.33 mg L−1 methylene blue was degraded using the optimized experimental conditions: pH = 5.2–5.4; [H2O2] = 310 mg L−1; [ferroin] = 1.4 mg L−1; temperature = 36 ± 1 °C; reaction time = 165 min under UVA irradiation. Attenuation of most intense spectroscopic bands for the dyes achieved 94% (510 nm) and 96% (665 nm) reduction for methyl red and methylene blue, respectively, with degradation of ferroin itself. The present work brings empirical evidence that is possible to recycle ferroin as photo-Fenton-like process catalyst, as well as determine the best conditions for providing less acidic treated effluents with negligible suspended solid concentration, better than that obtained from classical photo-Fenton processes. HIGHLIGHTS Ferroin can act as a catalyst in photo-Fenton-like processes.; Degradation of azodye by modified Fenton treatment.; Drawbacks from classical Fenton processes are mitigated.; Waste acting as a catalyst for treating another waste.; Improvement for institutional waste management plan.;William Bardelin NunesRenato Falcão DantasEnelton FagnaniIWA Publishingarticleadvanced oxidation processesexperimental designhomogeneous photocatalysisphotodegradationwaste managementEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 5, Pp 1217-1227 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
advanced oxidation processes experimental design homogeneous photocatalysis photodegradation waste management Environmental technology. Sanitary engineering TD1-1066 |
| spellingShingle |
advanced oxidation processes experimental design homogeneous photocatalysis photodegradation waste management Environmental technology. Sanitary engineering TD1-1066 William Bardelin Nunes Renato Falcão Dantas Enelton Fagnani Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| description |
Published literature describes the formation of the Fe (II)–phenanthroline complex (ferroin) as a stop way for Fenton processes, reducing radical yield. By contrast, this study presents evidence that ferroin can be activated by UVA in mildly acidic media in a photo-Fenton-like process. Because ferroin is the main waste from total iron determination in environmental samples, a recycling approach is suggested. Based on the best practices of waste management planning, an application of the proposed method for treating another chemical waste is presented. Titrimetric ammonia determination waste containing 2.67 mg L−1 methyl red azo dye and 1.33 mg L−1 methylene blue was degraded using the optimized experimental conditions: pH = 5.2–5.4; [H2O2] = 310 mg L−1; [ferroin] = 1.4 mg L−1; temperature = 36 ± 1 °C; reaction time = 165 min under UVA irradiation. Attenuation of most intense spectroscopic bands for the dyes achieved 94% (510 nm) and 96% (665 nm) reduction for methyl red and methylene blue, respectively, with degradation of ferroin itself. The present work brings empirical evidence that is possible to recycle ferroin as photo-Fenton-like process catalyst, as well as determine the best conditions for providing less acidic treated effluents with negligible suspended solid concentration, better than that obtained from classical photo-Fenton processes. HIGHLIGHTS
Ferroin can act as a catalyst in photo-Fenton-like processes.;
Degradation of azodye by modified Fenton treatment.;
Drawbacks from classical Fenton processes are mitigated.;
Waste acting as a catalyst for treating another waste.;
Improvement for institutional waste management plan.; |
| format |
article |
| author |
William Bardelin Nunes Renato Falcão Dantas Enelton Fagnani |
| author_facet |
William Bardelin Nunes Renato Falcão Dantas Enelton Fagnani |
| author_sort |
William Bardelin Nunes |
| title |
Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| title_short |
Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| title_full |
Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| title_fullStr |
Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| title_full_unstemmed |
Ferroin in dyes degradation by Fenton-like process: a chemical waste recycling perspective |
| title_sort |
ferroin in dyes degradation by fenton-like process: a chemical waste recycling perspective |
| publisher |
IWA Publishing |
| publishDate |
2021 |
| url |
https://doaj.org/article/67e3ac030cf54b26920699f130d2217c |
| work_keys_str_mv |
AT williambardelinnunes ferroinindyesdegradationbyfentonlikeprocessachemicalwasterecyclingperspective AT renatofalcaodantas ferroinindyesdegradationbyfentonlikeprocessachemicalwasterecyclingperspective AT eneltonfagnani ferroinindyesdegradationbyfentonlikeprocessachemicalwasterecyclingperspective |
| _version_ |
1718443735764697088 |