Decolourization of tartrazine from aqueous solutions by coupling electrocoagulation with ZnO photocatalyst

• Autorzy: Modirshahla N. , Abdoli M. , Behnajady M. A. , Vahid B.
• Języki publikacji: EN

Abstrakty

EN

Decolourization of tartrazine (C.I. Acid Yellow 23, AY23) in aqueous solutions has been investigated by coupling electrocoagulation and ZnO photocatalyst methods and also by a comparison between ZnO, UV, EC, UV/ZnO, UV/EC, and EC/UV/ZnO systems in the removal of AY23 as a model contaminant. Results indicated that the decolourization efficiency was in order of EC/UV/ZnO > UV/EC > EC > UV/ZnO > ZnO > UV. Combining EC with UV/ZnO can trigger the Fenton or Fenton-like reaction, which accelerates the rate of decolourization. Desired operating conditions for decolourization of 40 mg·dm^-3 AY23 solution in EC/UV/ZnO process were [ZnO] ₀=650 mg·dm^-3, [NaCl] = 800 mg·dm^-3, light intensity = 31/2 W·m^-2, current density = 120 A·m^-2, electrodes distance = 15 mm, pH = 6.29, stirring rate = 900 rpm and electrodes of steel 304/A1, which yielded 99.70% colour removal in 5 min of treatment time.

Słowa kluczowe

EN

zinc oxide; coagulation; decolourization; electrocoagulation; tartrazine; C.I. Acid Yellow 23; AY23; colour removal; color removal

PL

tlenek cynku; koagulacja; odbarwianie; koagulacja za pomocą elektrolitu; elektrokoagulacja; tartrazyna; żółcień spożywcza; żółcień kwasowa 23; barwniki azowe; usuwanie koloru

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2013
• Tom: Vol. 39, nr 1
• Strony: 59--73
• Opis fizyczny: Bibliogr. 21 poz., tab., rys., wykr.

Twórcy

autor

Modirshahla N.

• Department of Applied Chemistry, Tabriz Branch Islamic Azad University, Tabriz, I. R. Iran

autor

Abdoli M.

• Department of Applied Chemistry, Tabriz Branch Islamic Azad University, Tabriz, I. R. Iran

autor

Behnajady M. A.

• Department of Applied Chemistry, Tabriz Branch Islamic Azad University, Tabriz, I. R. Iran

autor

Vahid B.

• Department of Applied Chemistry, Tabriz Branch Islamic Azad University, Tabriz, I. R. Iran

Bibliografia

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