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Study on CuO/Al 2 O 3 catalytic ozone treatment of acid red B solution
Author(s) -
Qian Jianhua,
Chen Mingming,
Li Junhua,
Zhang Dan,
Liu Lin,
Xing Jinjuan
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201800496
Subject(s) - chemistry , catalysis , alkalinity , x ray photoelectron spectroscopy , aqueous solution , adsorption , inorganic chemistry , point of zero charge , degradation (telecommunications) , decomposition , nuclear chemistry , ozone , chemical oxygen demand , wastewater , chemical engineering , organic chemistry , telecommunications , computer science , engineering , waste management
A CuO/Al 2 O 3 catalyst was prepared using the impregnation method. The catalytic activity of CuO/Al 2 O 3 for the ozonation of acid red B (ARB) in aqueous solution was studied, the chemical oxygen demand (COD) removal rate was an indicator for catalytic activity evaluation. The effects of initial ARB concentration, solution pH, and different oxidative degradation systems on oxidative degradation of ARB solution were studied. The CuO/Al 2 O 3 catalyst was characterized using X‐ray diffractometry (XRD), N 2 adsorption desorption test, X‐ray photoelectron spectroscopy (XPS), and zero‐point charge (pH zpc ). The results show that copper species on the carrier were in the form of CuO and highly dispersed on the carrier. CuO can increase the alkalinity of the Al 2 O 3 surface, and the CuO/Al 2 O 3 catalyst facilitates the decomposition of O 3 into ·OH, which was beneficial for the catalytic O 3 oxidation degradation reaction. With the increase of the initial concentration of simulated wastewater, the CuO/Al 2 O 3 catalytic reaction still has a high COD removal rate. Alkaline solution was of benefit to catalyze the degradation of ARB solution. When the ARB solution pH = 8.93, the degradation reaction was carried out for 40 min, the COD removal rate reached 83.2%. The degradation reaction was dominated by the hydroxyl radical (·OH) reaction.