Coal Fly Ash‐based P Zeolite‐anchored Cu x O as an Efficient Catalyst for Heterogeneous Photo‐Fenton Degradation of Methylene Blue

• Published in: ChemistrySelect (Weinheim) 2023-06, Vol.8 (22)
• Main Authors: Li, Lei, Gan, Simeng, Zhang, Huabing, Sun, Houxiang, Zhong, Zicong
• Format: Article
• Language: English
• ISSN: 2365-6549; 2365-6549
• DOI: 10.1002/slct.202300810

The environmental quality has been given more attention because of the potential hazards brought by urbanization and industrialization. Therefore, this study proposed a comprehensive utilization method for treating dye wastewater using solid waste. P zeolite was prepared using coal fly ash (CFA), and then anchored with Cu x O as catalyst (Cu x O/P) for heterogeneous Fenton‐like degradation of methylene blue (MB) under ultraviolet irradiation (UV). Compared with P zeolite and CuO, the catalyst Cu x O/P showed the highest degradation efficiency of MB in combination with H 2 O 2 and UV (98.3 %) after 90 min of reaction. This can be attributed to the involvement of copper component and the dispersion of P zeolite as the carrier. The MB degradation reaction was consistent with first‐order kinetics. The sum of the rate constant k in the Cu x O/P+H 2 O 2 (0.0030 min −1 ) and Cu x O/P+UV (0.0035 min −1 ) system is much lower than that in the Cu x O/P+H 2 O 2 +UV system (0.0491 min −1 ), indicating a strong synergistic effect among Cu x O/P, H 2 O 2 , and UV. Meanwhile, the catalyst Cu x O/P with excellent stability and renewability presented a degradation efficiency of over 95 % in 5 cycles, exhibiting considerable application prospects in dye wastewater treatment. Furthermore, the most effectively radical was ⋅OH generated by catalytic H 2 O 2 . This work provided a new perspective for the reuse of coal fly ash. It would be one of the most efficient and comprehensive utilization ways to treat wastewater with solid waste.