Application of flower-like bismuth oxyiodide material, and treatment method of organic pollutants in water
An organic pollutant, bismuth oxyiodide technology, applied in the direction of oxidation water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve problems such as narrow applicable pH range, few types of catalysts, high biological toxicity and environmental hazards , to achieve the effect of wide applicable pH range, high removal efficiency and water purification
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Embodiment 1
[0084] Preparation of flower-like bismuth oxyiodide material:
[0085] In a 250mL beaker, add 3.886g of bismuth nitrate pentahydrate, add 100mL of ethylene glycol, stir and dissolve to obtain an ethylene glycol solution of bismuth nitrate. Take another 250mL beaker, add 1.328g potassium iodide, add 100mL ethylene glycol, stir to dissolve, and obtain potassium iodide ethylene glycol solution. Under the continuous magnetic stirring of 500r / min, the ethylene glycol solution of potassium iodide was added dropwise to the ethylene glycol solution of bismuth nitrate at a rate of 20 drops / min with a dropping funnel to obtain 200mL orange-red transparent precursor solution;
[0086] The orange-red transparent precursor solution was dispensed into a polytetrafluoroethylene reactor liner with a volume of 100 mL, and each kettle contained 50 mL of the transparent precursor solution. After putting on the stainless steel kettle jacket, put it in an oven, raise the temperature to 160°C, car...
Embodiment 2
[0091] Flower-shaped bismuth oxyiodide-peracetic acid system to remove bisphenol A from water:
[0092] Add the flower-shaped bismuth oxyiodide material obtained in Example 1 into the solution with bisphenol A as the treatment object, and the dosage is 0.2g / L; under the magnetic stirring of 500r / min, add peracetic acid, The dosage is 800μmol / L for oxidative degradation.
[0093] Figure 4 It is the degradation kinetic curve of different concentrations of bisphenol A in the flower-like bismuth oxyiodide material-peracetic acid system. From Figure 4 It can be seen that within 2 minutes, bisphenol A within 10 mg / L (43.8 μmol / L) can be completely removed, and the removal rate of bisphenol A at 20 mg / L (87.6 μmol / L) reaches 80%, and 50 mg / L ( 219μmol / L), the removal rate of bisphenol A is about 60%.
Embodiment 3
[0095] Recycling of flower-shaped bismuth oxyiodide materials:
[0096] The flower-shaped bismuth oxyiodide material used in Example 2 was recovered by centrifugation, washed with deionized water, continued to add 10 mg / L bisphenol A solution, and added peracetic acid under magnetic stirring at 500 r / min. The dosage is 800μmol / L. After 5 minutes of reaction, the removal rate of bisphenol A was detected. The flower-shaped bismuth oxyiodide material was repeatedly washed and reused according to the above scheme, and the removal rate of bisphenol A was monitored after 5 min until the catalytic ability was reduced to the point that the bisphenol A in the solution could not be completely degraded due to the loss of the catalyst. Figure 5 It is the removal rate of bisphenol A activated by peracetic acid within 5 minutes of the flower-shaped bismuth oxyiodide material in each cycle, from Figure 5 It can be seen that in the first 5 cycles, the degradation rate of bisphenol A can r...
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