Photoassisted Fenton degradation of phthalocyanine dyes from wastewater of printing industry using Fe(II)/纬-Al₂O₃ catalyst in up-flow fluidized-bed

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• 作者：Hsuhui Cheng^a ; Shihjie Chou^b ; Shiaoshing Chen^b ; ^{f10919@ntut.edu.tw" class="auth_mail} ; Chiajen Yu^a
• 关键词：Fe(II)/纬-Al2O3 catalyst ; phthalocyanine dyes ; fluidize
• 刊名：Journal of Environmental Sciences
• 出版年：1 June, 2014
• 年：2014
• 卷：26
• 期：6
• 页码：1307-1312
• 全文大小：355 K

文摘

Fe(II)/纬-Al₂O₃ powders synthesized using the dipping method were produced from a mixed aqueous solution containing aluminium oxide (纬-Al₂O₃) and iron(II)-precursor (FeSO₄), 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 Fe²⁺ ion was compounded on the 纬-Al₂O₃ 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)/纬-Al₂O₃ 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.