PROCESELE AVANSATE DE FOTO-OXIDARE (REAGENTUL FENTON) PENTRU MINERALIZAREA SURFACTANTULUI ANIONIC 2-ETIL-HEXIL SULFAT DE NATRIU
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Date
2021-06-04
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US Cahul
Abstract
A fost studiat procesul degradării și mineralizării surfactantului anionic 2-etil-hexil sulfat de sodiu (2-EHS), utilizînd procesul de oxidare foto-catalitică cu reagentul Fenton. Cercetările experimentale au fost realizate pe sisteme model în soluții apoase. Au fost stabilite condițiile optime de degradare și mineralizare în funcție de pH, timpul de oxidare, concentrația peroxidului de hidrogen și a Fe (II). Concentrația remanentă a surfactantului 2-EHS în urma foto-oxidării cu reagentul Fenton a fost determinată folosind metoda spectrofotometrica cu Albastru de Metilen. Ca urmare a cercetărilor științifice s-a constatat că eficiența degradării și mineralizării surfactantului anionic 2-EHS depinde de parametrii fizico-chimici astfel ca: pH, concentrația peroxidului de hidrogen, de concentrația Fe(II) și timpul de oxidare. S-a stabilit ca procesul de oxidare foto-catalitică cu reagentul Fenton decurge cu o eficiență de 95%.
The degradation and mineralization process of the anionic surfactant sodium 2-ethylhexyl sulfate (2-EHS) was studied using the photocatalytic oxidation process with Fenton reagent. The experimental investigations were carried out on model systems in aqueous solutions. Optimal conditions for degradation and mineralization were determined according to pH, oxidation time, hydrogen peroxide and Fe(II) concentration. The remaining concentration of the surfactant 2-EHS following photo-oxidation with the Fenton reagent was determined using the Methylene Blue spectrophotometric method. As a result of scientific research, it was found that the efficiency of degradation and mineralization of the anionic surfactant 2-EHS depends on physico-chemical parameters such as pH, hydrogen peroxide concentration, Fe(II) concentration and oxidation time. It has been established that the photo-catalytic oxidation process with the Fenton reagent proceeds with 95% efficiency.
The degradation and mineralization process of the anionic surfactant sodium 2-ethylhexyl sulfate (2-EHS) was studied using the photocatalytic oxidation process with Fenton reagent. The experimental investigations were carried out on model systems in aqueous solutions. Optimal conditions for degradation and mineralization were determined according to pH, oxidation time, hydrogen peroxide and Fe(II) concentration. The remaining concentration of the surfactant 2-EHS following photo-oxidation with the Fenton reagent was determined using the Methylene Blue spectrophotometric method. As a result of scientific research, it was found that the efficiency of degradation and mineralization of the anionic surfactant 2-EHS depends on physico-chemical parameters such as pH, hydrogen peroxide concentration, Fe(II) concentration and oxidation time. It has been established that the photo-catalytic oxidation process with the Fenton reagent proceeds with 95% efficiency.
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Keywords
Oxidare foto-catalitică, reagent Fenton, surfactant anionic, 2-etil-hexil sulfat de sodiu, peroxid de hidrogen, ioni de Fe(II), Photocatalytic oxidation, Fenton reagent, anionic surfactant, sodium 2-ethylhexyl sulfate, hydrogen peroxide, Fe(II) ions
Citation
PORUBIN-SCHIMBĂTOR, Veronica, GONŢA, Maria, MOCANU, Larisa. Procesele avansate de foto-oxidare (reagentul Fenton) pentru mineralizarea surfactantului anionic 2-etil-hexil sulfat de natriu. În: Perspectivele şi Problemele Integrării în Spaţiul European al Cercetării şi Educaţiei:Conferință Științifică Internațională, Ed. 8, 4 iunie 2021, Cahul: US Bogdan Petriceicu Hașdeu, 2021, Vol.8, Partea 1, pp. 319-326. ISSN 2587-3563