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Photocatalytic and sonolytic oxidation of acid orange 7 in aqueous solution

Velegraki Theodora, Poulios Ioannis , Charalabaki Magdalini , Kalogerakis Nikos, Samaras Petros, Mantzavinos Dionysis

Απλή Εγγραφή


URIhttp://purl.tuc.gr/dl/dias/9DE90F3C-ADAA-4AC8-9C06-AC2DD67138AC-
Αναγνωριστικόhttps://doi.org/10.1016/j.apcatb.2005.07.007-
Γλώσσαen-
Μέγεθος9en
ΤίτλοςPhotocatalytic and sonolytic oxidation of acid orange 7 in aqueous solutionen
ΔημιουργόςVelegraki Theodoraen
ΔημιουργόςΒελεγρακη Θεοδωραel
ΔημιουργόςPoulios Ioannis en
ΔημιουργόςCharalabaki Magdalini en
ΔημιουργόςKalogerakis Nikosen
ΔημιουργόςΚαλογερακης Νικοςel
Δημιουργός Samaras Petrosen
ΔημιουργόςMantzavinos Dionysisen
ΔημιουργόςΜαντζαβινος Διονυσηςel
ΕκδότηςElsevieren
ΠεριγραφήΔημοσίευση σε επιστημονικό περιοδικό el
ΠερίληψηThe oxidation of 50 mg/L azodye acid orange 7 (AO7) in water was investigated by means of photocatalysis in the presence of various semiconducting catalysts and ultrasound irradiation. The UVA-induced photocatalytic degradation over TiO2 anatase suspensions was found to increase with increasing catalyst concentration, decreasing solution pH, as well as in the presence of dissolved oxygen. The presence of 1,4-benzoquinone, sodium azide or sodium chloride in the reaction mixture decreased degradation due to the scavenging of radicals and other reactive moieties. Interestingly, addition of hydrogen peroxide at various concentrations from 21 to 1050 mg/L also inhibited degradation. The sonochemical degradation of AO7 was found to increase with increasing frequency and decreasing temperature. Under similar treatment conditions, ultrasound irradiation resulted in higher conversion than photocatalysis; moreover, the sonochemically irradiated solution consistently contained low aliphatic intermediates, while the photocatalytically treated solution mainly consisted of aromatic intermediates as confirmed by GC–MS analysis. The acute toxicity to marine bacteria V. fischeri decreased following oxidation with either process. Furthermore, deep sonochemical treatment slightly improved the aerobic biodegradability as assessed by shake flask tests.en
ΤύποςPeer-Reviewed Journal Publicationen
ΤύποςΔημοσίευση σε Περιοδικό με Κριτέςel
Άδεια Χρήσηςhttp://creativecommons.org/licenses/by/4.0/en
Ημερομηνία2015-10-18-
Ημερομηνία Δημοσίευσης2006-
Θεματική ΚατηγορίαAcid orange 7en
Θεματική ΚατηγορίαReaction intermediates (Chemistry)en
Θεματική ΚατηγορίαReactive intermediates (Chemistry)en
Θεματική Κατηγορίαintermediates chemistryen
Θεματική Κατηγορίαreaction intermediates chemistryen
Θεματική Κατηγορίαreactive intermediates chemistryen
Θεματική ΚατηγορίαPhotocatalysisen
Θεματική ΚατηγορίαToxicityen
Θεματική ΚατηγορίαTiO2en
Θεματική ΚατηγορίαUltrasounden
Θεματική ΚατηγορίαWastewateren
Βιβλιογραφική ΑναφοράT. Velegraki, I.Poulios, M. Charalabaki, N.Kalogerakis, P.Samaras and D.Mantzavinos,"Photocatalytic and sonolytic oxidation of acid orange 7 in aqueous solution," Applied Catalysis B: Environmental, vol. 62, no. 1-2, pp. 159–168, Jan. 2006. doi: 10.1016/j.apcatb.2005.07.007en

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