Enhanced mineralization of Reactive Black 5 by waste iron oxide via photo-Fenton process

Weihua Tan, Jia Ai, Yuanrou Fan, Xiang Liu, Yuncheng Xu, Hui Zhang, Yao Hui Huang

研究成果: Article同行評審

3 引文 斯高帕斯(Scopus)

摘要

Advanced oxidation process is a promising technology for the treatment of azo dye wastewater, owing to its high degradation performance and less secondary contamination. Herein, the mineralization of azo dye Reactive Black 5 (RB5) by the heterogeneous photo-Fenton process was investigated in a three-phase fluidized bed reactor. The waste iron oxide (denoted as BT) obtained from tannery wastewater process with Fenton’s reagent was selected as a heterogeneous catalyst. The introduction of BT to the UV/H2O2 process (UV/H2O2/BT) shows obviously higher mineralization efficiency because ferric complexes of carboxylic acid, the degradation intermediates of RB5, could be readily decomposed by UV irradiation. The decolorization was achieved by homogenous photo-Fenton reaction induced by leached iron, while the mineralization was contributed to heterogeneous oxidation. Under the conditions of 254 nm UV irradiation, 19.00 mM H2O2, 2.0 g L–1 catalyst loading and natural pH0 of 5.0, 90.2% TOC removal of RB5 could be achieved. The catalyst indicated an acceptable stability and reusability after four cycles. The proposed heterogeneous photo-Fenton process with stable performance is environmental-friendly for the mineralization of RB5.

原文English
頁(從 - 到)4423-4431
頁數9
期刊Research on Chemical Intermediates
46
發行號10
DOIs
出版狀態Published - 2020 十月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)

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