Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate

There is increasing concern about contamination by surfactants that are used to extract organic pollutants during remediation of polluted soils and aquifers. For instance, the surfactant sodium dodecyl sulfate may produce sulfate, which is a pollutant at high concentrations. Reports suggest that whe...

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Päätekijät:	Santos, Elisama Vieira dos, Araújo, Karla C. de F., Barreto, Jéssica P. de P., Cardozo, Jussara C., Araújo, Danyelle M. de, Martínez‐Huitle, Carlos Alberto
Aineistotyyppi:	article
Kieli:	English
Julkaistu:	Springer
Aiheet:	Diamond electrode Persulfate Sodium dodecyl sulfate Sulfate release Surfactant
Linkit:	https://repositorio.ufrn.br/jspui/handle/123456789/29772
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id	ri-123456789-29772
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spelling	ri-123456789-297722020-08-02T07:54:50Z Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate Santos, Elisama Vieira dos Araújo, Karla C. de F. Barreto, Jéssica P. de P. Cardozo, Jussara C. Araújo, Danyelle M. de Martínez‐Huitle, Carlos Alberto Diamond electrode Persulfate Sodium dodecyl sulfate Sulfate release Surfactant There is increasing concern about contamination by surfactants that are used to extract organic pollutants during remediation of polluted soils and aquifers. For instance, the surfactant sodium dodecyl sulfate may produce sulfate, which is a pollutant at high concentrations. Reports suggest that when remediation involves sodium dodecyl sulfate and electrochemical treat-ments, SO42− ions could be produced then oxidized to persulfate (S2O82−). However, there is few knowledge on the mechanism of electrochemical production of sulfate and persulfate. Here, we tested for frst time the electrochemical production of persulfate from sulfate released by oxidation of sodium dodecyl sulfate, using anodic oxidation with boron-doped diamond. Results show a high efciency of persulfate production, reaching 2.5 μM, when 500 mg/L of surfactant in 0.05 mol/L of Na2SO4 was electrolyzed at 60 mA cm−2, by comparison with only 0.7 μM of persulfate without surfactant in solution. Thisefciency is explained by electrogeneration of hydroxyl radicals and persulfate. Results also show that 97% of the surfactant is transformed by fragmentation and oxidation, as revealed by particle size measurements 2020-07-31T19:55:36Z 2020-07-31T19:55:36Z 2018-01-13 article ARAÚJO, Karla C. de F.; BARRETO, Jéssica P. de P.; CARDOZO, Jussara C.; SANTOS, Elisama V.; ARAÚJO, Danyelle M.; MARTÍNEZ-HUITLE, Carlos A. . Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate. Environmental Chemistry Letters, v. xx, p. xx-652, 2018. Disponível em: https://link.springer.com/article/10.1007/s10311-017-0703-6. Acesso em: 30 jul. 2020. http://dx.doi.org/10.1007/s10311-017-0703-6 1610-3661 https://repositorio.ufrn.br/jspui/handle/123456789/29772 10.1007/s10311-017-0703-6 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Springer
institution	Repositório Institucional
collection	RI - UFRN
language	English
topic	Diamond electrode Persulfate Sodium dodecyl sulfate Sulfate release Surfactant
spellingShingle	Diamond electrode Persulfate Sodium dodecyl sulfate Sulfate release Surfactant Santos, Elisama Vieira dos Araújo, Karla C. de F. Barreto, Jéssica P. de P. Cardozo, Jussara C. Araújo, Danyelle M. de Martínez‐Huitle, Carlos Alberto Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
description	There is increasing concern about contamination by surfactants that are used to extract organic pollutants during remediation of polluted soils and aquifers. For instance, the surfactant sodium dodecyl sulfate may produce sulfate, which is a pollutant at high concentrations. Reports suggest that when remediation involves sodium dodecyl sulfate and electrochemical treat-ments, SO42− ions could be produced then oxidized to persulfate (S2O82−). However, there is few knowledge on the mechanism of electrochemical production of sulfate and persulfate. Here, we tested for frst time the electrochemical production of persulfate from sulfate released by oxidation of sodium dodecyl sulfate, using anodic oxidation with boron-doped diamond. Results show a high efciency of persulfate production, reaching 2.5 μM, when 500 mg/L of surfactant in 0.05 mol/L of Na2SO4 was electrolyzed at 60 mA cm−2, by comparison with only 0.7 μM of persulfate without surfactant in solution. Thisefciency is explained by electrogeneration of hydroxyl radicals and persulfate. Results also show that 97% of the surfactant is transformed by fragmentation and oxidation, as revealed by particle size measurements
format	article
author	Santos, Elisama Vieira dos Araújo, Karla C. de F. Barreto, Jéssica P. de P. Cardozo, Jussara C. Araújo, Danyelle M. de Martínez‐Huitle, Carlos Alberto
author_facet	Santos, Elisama Vieira dos Araújo, Karla C. de F. Barreto, Jéssica P. de P. Cardozo, Jussara C. Araújo, Danyelle M. de Martínez‐Huitle, Carlos Alberto
author_sort	Santos, Elisama Vieira dos
title	Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
title_short	Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
title_full	Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
title_fullStr	Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
title_full_unstemmed	Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
title_sort	sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
publisher	Springer
publishDate	2020
url	https://repositorio.ufrn.br/jspui/handle/123456789/29772
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Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate

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