Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/jspui/handle/123456789/29772
Title: Sulfate pollution: evidence for electrochemical production of persulfate by oxidizing sulfate released by the surfactant sodium dodecyl sulfate
Authors: 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
Keywords: Diamond electrode;Persulfate;Sodium dodecyl sulfate;Sulfate release;Surfactant
Issue Date: 13-Jan-2018
Publisher: Springer
Citation: 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
Portuguese Abstract: 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
URI: https://repositorio.ufrn.br/jspui/handle/123456789/29772
ISSN: 1610-3661
Appears in Collections:ECT - Artigos publicados em periódicos

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