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Comprehensive Experimental Design of Transition Metal Catalyst CoxNi1-xTiO3 Activated Persulfate for Removal of Pollutants From Water |
CHENG Yuanyuan,ZANG Meng,QI Hongbin |
School of Science, China University of Geosciences (Beijing), Beijing 100083, China |
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Abstract The advanced oxidation technology based on persulfate (PMS) has the characteristics of high efficiency and environmental friendliness, which has a very good application prospect in the field of water treatment. A series of heterogeneous catalysts CoxNi1-xTiO3 with different Co/Ni ratios were prepared by using the method of glycol precipitation-calcination by taking advantage of the synergistic activation of PMS among transition metals. The phase and microstructure of the catalyst were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). At the same time, the effects of catalyst dosage, PMS concentration, pH value and catalyst recycling on the degradation of Ciprofloxacin (CIP) were investigated. The optimal conditions were 0.20g/L Co0.7Ni0.3TiO3, 0.5mmol/L PMS and pH=6. The efficiency of CIP degradation was 90.01% within 60min. The experiment of free radical quenching confirmed that SO·-4 is the main active species in the process of advanced oxidative degradation.
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Received: 28 November 2023
Published: 04 July 2024
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