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Method for degrading organic waste water by photo-assisted activation of potassium hydrogen persulfate through bismuth ferrite

A technology of potassium hydrogen persulfate and organic waste water, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., to achieve good application prospects, good stability, and improved utilization.

Inactive Publication Date: 2015-07-01
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far the light-assisted perovskite structure BiFeO 3 Activation of potassium hydrogen persulfate to degrade organic pollutants is rarely reported

Method used

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  • Method for degrading organic waste water by photo-assisted activation of potassium hydrogen persulfate through bismuth ferrite
  • Method for degrading organic waste water by photo-assisted activation of potassium hydrogen persulfate through bismuth ferrite
  • Method for degrading organic waste water by photo-assisted activation of potassium hydrogen persulfate through bismuth ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 2.1g of bismuth nitrate and dissolve it in 150ml of water, add 1g of cetyltrimethylammonium bromide and stir thoroughly, then add 1.8g of ferric nitrate, stir for 30min, then add 31.5g of potassium hydroxide as a mineralizer, after fully stirring Put the mixed solution into a reaction kettle with a filling degree of 80%. After setting the heating and cooling rate, react at 180°C for 6h. After the product is fully washed with deionized water and ethanol until the pH value is 7, dry at 60°C for 5h to obtain The brown sample is spherical BiFeO 3 catalyst of light.

[0025] 2. Evaluation of the effect of using light-assisted bismuth ferrite to activate potassium hydrogen persulfate to degrade organic wastewater

Embodiment 2

[0027] Using photocatalyst BiFeO 3 Combined with potassium hydrogen persulfate to degrade organic dye wastewater, the treatment object is 200mL of rhodamine B aqueous solution with a concentration of 5mg / L, and 0.2g BiFeO is added to the reactor 3 , stirred for 30 minutes under no light conditions, so that the rhodamine in the solution and the surface of the photocatalyst reached an adsorption-desorption equilibrium, then added 0.3g potassium persulfate under the condition of sufficient stirring, turned on the 500W xenon lamp, and carried out the photocatalytic oxidation reaction . Sampling every 5min, each sampling 5mL, test the absorbance value at the maximum wavelength with a UV-visible spectrophotometer, and calculate the degradation rate of the rhodamine solution through the change of the absorbance value.

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Abstract

The invention discloses a method for degrading organic waste water by photo-assisted activation of potassium hydrogen persulfate through bismuth ferrite, belonging to the technical field of waste water treatment. A perovskite structure BiFeO3 in the invention has a spherical morphology and is prepared by adding a certain amount of a surface active agent under hydrothermal conditions; the specific surface area is high; and the prepared BiFeO3 self can degrade organic pollutants by photocatalysis under the irradiation of visible light. According to the method disclosed by the invention, BiFeO3 is applied to degrading the organic pollutants by activating potassium hydrogen persulfate; the methyl orange degradation rate within 15 min is 94%; the methyl blue degradation rate within 40 min is 90%; the rhodamine degradation rate within 40 min is 65%; by means of combined use of BiFeO3 and potassium hydrogen persulfate, the organic pollutants are oxidized and degraded; the organic pollutants can be effectively degraded under better illumination conditions; the organic pollutants can also be effectively oxidized and degraded without light or under poor illumination conditions; and therefore, the method has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and relates to a method for degrading organic waste water, in particular to a treatment method for degrading organic waste water by activating potassium hydrogen persulfate with photo-assisted bismuth ferrite. Background technique [0002] At present, my country needs to discharge a large amount of industrial wastewater (such as petrochemical wastewater, printing and dyeing wastewater, and pharmaceutical wastewater) every year. ), azo organic pollutants, etc., their biodegradability is poor, and most of them have carcinogenic effects, endangering human health. At this time, it is difficult to remove them by the commonly used biological treatment technology, and even the introduction of these toxic substances may cause microbial poisoning, leading to the collapse of the biological treatment system. Therefore, it is imperative to treat industrial wastewater. [0003] "Fenton catalytic oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72B01J23/843
CPCB01J23/8437C02F1/30C02F1/725C02F2101/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 池方丽宋标杨斌吕耀辉冉松林
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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