Discoloration of dye wastewater by modified UV-Fenton process with sodium percarbonate

• Autorzy: Pieczykolan B. , Płonka I. , Barbusiński K.
• Języki publikacji: EN

Abstrakty

EN

A modified Fenton process using sodium percarbonate (SP), as an alternative source of H2O2, and UV radiation was investigated to discoloration of dye wastewater containing Acid Green 16 (concentration 100 mg/dm3). This acid dye is characterized by the harmful effect on aquatic organisms and it may cause adverse effects in the aquatic environment. The experiments were carried out in two systems, in which two lamps were used as a UV radiation source: low pressure (system I) and medium pressure (system II). The effect of SP dosage (100-400 mg/dm3 – system I; and 100-250 mg/dm3 – system II), Fe2+/SP ratio (from 0.2 to 0.4), reaction pH (3 and 4) and reaction time (from 10 to 30 min) on colour removal efficiency was examined. The modified Fenton process was found to be very efficient for discoloration of simulated wastewater. For a system with a low pressure UV lamp the optimal doses of SP and Fe2+/SP ratio were 400 mg/dm3 and 0.2, respectively at pH 3 and 20 minutes reaction time. For a system with a medium pressure UV lamp the optimal doses of SP and Fe2+/SP ratio were 200 mg/dm3 and 0.33, respectively at pH 3 and 20 minutes reaction time. In both cases, at described conditions total visual discoloration was achieved. Better results of colour removal (concentration of Acid Green 16 was in the range of 0.64-0.96 mg/dm3) were achieved when the initial pH value equalled 3.0 than at initial pH value of 4.0 (concentration of Acid Green 16 was in the range of 0.80-6.87 mg/dm3).

PL

W procesie odbarwiania ścieków zawierających barwnik Acid Green 16 (o stężeniu 100 mg/dm3) zastosowano zmodyfikowany proces Fentona z nadwęglanem sodu, jako alternatywnym źródłem nadtlenku wodoru, wspomagany promieniowaniem UV. Barwnik ten zaliczany do grupy barwników kwasowych charakteryzuje się szkodliwym działaniem na organizmy wodne, a także może wywoływać niekorzystne zmiany w tym środowisku. Badania prowadzono w dwóch układach wyposażonych w lampy UV: niskociśnieniową (system I) i średniociśnieniową (system II). Podczas badań zastosowano dawki nadwęglanu sodu w zakresie (100-400 mg/dm3 – układ I oraz 100-250 mg/dm3 – układ II), wartości stosunku Fe2+/nadwęglan (od 0.2 do 0.4), pH reakcji (3 i 4), a także czas naświetlania (od 10 do 30 min). Zmodyfikowany proces Fentona okazał się bardzo skuteczny w odbarwianiu badanych ścieków. Dla układu I z lampą niskociśnieniową najkorzystniejsza dawka nadwęglanu sodu oraz stosunek Fe2+/nadwęglan wynosiły odpowiednio 400 mg/dm3 i 0.2, przy pH=3 i czasie naświetlania 20 minut. Dla układu II (lampa średniociśnieniowa) najkorzystniejsza dawka nadwęglanu sodu wynosiła 200 mg/dm3 i stosunek Fe2+/nadwęglan 0.33, przy pH=3 i czasie naświetlania 20 minut. W obu przypadkach dla tych parametrów uzyskano wizualne odbarwienie ścieków. Lepsze efekty odbarwienia uzyskano dla pH=3 w porównaniu z pH=4 (stężenie barwnika odpowiednio 0.64-0.96 mg/dm3 i 0.80-6.87 mg/dm3).

Słowa kluczowe

EN

Fenton's reagent; UV-Fenton; Acid Green 16; sodium percarbonate; discoloration

PL

odczynnik Fentona; Acid Green 16; nadwęglan sodu; odbarwianie

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2016
• Tom: Vol. 9, no. 4
• Strony: 135--140
• Opis fizyczny: Bibliogr. 30 poz.

Twórcy

autor

Pieczykolan B.

• The Silesian University of Technology, Institute of Water and Wastewater Engineering, Konarskiego 18, 44-100 Gliwice, Poland

autor

Płonka I.

• The Silesian University of Technology, Institute of Water and Wastewater Engineering, Konarskiego 18, 44-100 Gliwice, Poland

autor

Barbusiński K.

• The Silesian University of Technology, Institute of Water and Wastewater Engineering, Konarskiego 18, 44-100 Gliwice, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).