Preparation method of supported ozone catalyst for treating steel wastewater
A catalyst and supported technology, which is applied in the field of water pollution treatment, can solve the problems of secondary pollution and degradation of water quality, difficulty in recovering suspended catalysts, shortening reaction time, etc. The effect of efficiency
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[0017] Example 1:
[0018] Preparation of ozone catalyst: Prepare manganese / cobalt / nickel composite oxide precursor by chemical precipitation method, wash, filter, dry and calcinate at 350 ℃ for 4 h to obtain ternary MnO 2 / NiO / CoO ozone catalyst;
[0019] Preparation of supported ozone catalyst: After mixing sodium alginate and ternary ozone catalyst in a ratio of 0.5:1, drop 10% CaCl into it 2 Solution, form immobilized SA-MnO after curing for 10 min 2 / NiO / CoO ozone catalyst gel ball, the prepared supported ozone catalyst has a degradation rate of 54.3% for the COD of steel leveling liquid and oily wastewater.
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[0020] Example 2:
[0021] Preparation of ozone catalyst: Prepare manganese / cobalt / copper composite oxide precursor by chemical precipitation method, wash, filter, dry and calcinate at 350 ℃ for 4 h to obtain ternary MnO 2 / NiO / CuO ozone catalyst;
[0022] Preparation of supported ozone catalyst: After mixing sodium alginate and ternary ozone catalyst at a ratio of 0.75:1, drop 5% CaCl into it 2 Solution, form immobilized SA-MnO after 15 minutes of curing 2 / NiO / CuO ozone catalyst gel ball, the prepared supported ozone catalyst has a 56.8% degradation rate of COD of steel leveling liquid and oily wastewater.
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[0023] Example 3:
[0024] Preparation of ozone catalyst: prepare manganese / cerium / lanthanum composite oxide precursor by chemical precipitation method, wash, filter, dry and calcinate at 350 ℃ for 4 h to obtain ternary MnO 2 / CeO 2 / LaO ozone catalyst;
[0025] Preparation of supported ozone catalyst: After mixing sodium alginate and ternary ozone catalyst at a ratio of 0.75:1, drop 10% CaCl into it 2 Solution, form immobilized SA-MnO after curing for 10 min 2 / CeO 2 / LaO ozone catalyst gel ball, the prepared supported ozone catalyst has a degradation rate of 64.3% for the COD of steel leveling liquid and oily wastewater.
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