1. Photoassisted Fenton degradation of phthalocyanine dyes from wastewater of printing industry using Fe(II)/γ-Al2O3 catalyst in up-flow fluidized-bed.
- Author
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Cheng, Hsuhui, Chou, Shihjie, Chen, Shiaoshing, and Yu, Chiajen
- Subjects
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PHTHALOCYANINES , *IRON catalysts , *WASTEWATER treatment , *PRINTING industry , *ALUMINUM compounds , *FLUIDIZED bed reactors , *CHEMICAL precursors - Abstract
Fe(II)/γ-Al 2 O 3 powders synthesized using the dipping method were produced from a mixed aqueous solution containing aluminium oxide (γ-Al 2 O 3 ) and iron(II)-precursor (FeSO 4 ), and used for photo-Fenton degradation of phthalocyanine dyes (PC S ) under ultraviolet (UV) irradiation in an up-flow fluidized bed. The catalysts were characterized by XRD, ESCA, BET, EDS and SEM. The results showed that Fe 2+ ion was compounded on the γ-Al 2 O 3 carrier. The effects of different reaction parameters such as catalyst activity, dosage and solution pH on the decolorization of PCS were assessed. Results indicated that maximum decolorization (more than 95%) of PC S occurred with 20 wt% Fe(II)/γ-Al 2 O 3 catalyst (dosage of 60 g/L) using a combination of UV irradiation and heterogeneous Fenton system. The degradation efficiency of PC S increases as pH decreases, exhibiting a maximum efficiency at pH 3.5. The recycled catalyst was capable of repeating three runs without a significant decrease in treatment efficiency, and this demonstrated the stability and reusability of catalyst. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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