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[Preparation of red mud loaded Co catalysts: optimization using response surface methodology (RSM) and activity
Hua-Nan Li1, Bing-Bing Xu2, Fei Qi3
1College of Environmental Science and Engineering, Beijing Forestry University, Beijing 100083, China. huanan1226@163.com
Red mud loaded with cobalt catalysts effectively remove bezafibrate (BZF) through catalytic ozonation. Optimized conditions yielded high BZF removal, demonstrating catalyst safety and application potential.
Area of Science:
- Environmental Chemistry
- Catalysis
- Water Treatment
Background:
- Bezafibrate (BZF) is a persistent pharmaceutical pollutant in water.
- Catalytic ozonation is a promising advanced oxidation process for pollutant degradation.
Purpose of the Study:
- To investigate the catalytic ozonation of BZF using red mud loaded with cobalt catalysts (Co/RM).
- To optimize reaction conditions and evaluate catalyst performance and safety.
Main Methods:
- Statistical experimental design (response surface methodology) was employed.
- Catalyst characterization using N2 adsorption, XRD, and UV-Vis analysis.
- Dissolved metal concentration determined by ICP-OES.
Main Results:
- Cobalt dipping mass and calcination temperature significantly influenced BZF degradation.
- Optimized conditions (4.14% cobalt, 389°C) achieved 70.74% BZF removal.
- Co/RM catalysts exhibited higher activity than bare red mud (RM).
- Co3O4 on RM surface enhanced catalytic activity.
- No leaching of active components confirmed catalyst safety.
Conclusions:
- The developed mathematical model reliably predicted catalyst performance.
- Co/RM catalysts are effective and safe for BZF removal via catalytic ozonation.
- These catalysts show potential for practical application in water treatment.
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