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Method for degrading complex organic matters in wastewater by using white light irradiation assisted ferrous oxidation method
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A technology of organic matter and oxidation method, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., it can solve the problems of complex organic matter with inconspicuous effects, and achieve a reduction in dosage and a sufficient degree of mineralization. , the effect of improving the oxidation efficiency
Pending Publication Date: 2020-05-08
LANZHOU PETROCHEM COLLEGE OF VOCATIONAL TECH
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However, most of these methods are used to degrade general organic matter or specific organic matter, and the effect on organic matter with complex components is not outstanding.
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Embodiment 1
[0049] In this embodiment, one liter of sample solution is used as wastewater for treatment, wherein the sample solution is prepared from gasoline, kerosene, diesel oil, and lubricating oil, and its organic components include: alkanes, cycloalkanes, aromatics, phenols, acids, and high Molecules, some heterocyclic compounds, and additives in them basically contain all the components of mineral oil, and their COD Cr 700mg / L.
[0050] Add hydrogenperoxide to waste water, the consumption of hydrogen peroxide is 12mL; then add oxidant, oxidant is ferrous ion, the consumption of oxidant is 1.5mL; Utilize white light to irradiate waste water at the same time, the irradiation time of white light is 2.5min; Stir rapidly, the reaction temperature of waste water is 60°C, wastewater pH=4.
Embodiment 2
[0052] In this embodiment, one liter of fish pond water is used as waste water for treatment, and its COD Cr It is 70mg / L.
[0053] Add hydrogen peroxide to waste water, the consumption of hydrogen peroxide is 12mL; then add oxidant, oxidant is ferrous ion, the consumption of oxidant is 1.5mL; Utilize white light to irradiate waste water at the same time, the irradiation time of white light is 2.5min; Stir rapidly, the reaction temperature of waste water is 60°C, wastewater pH=4.
Embodiment 3
[0055] In this embodiment, one liter of fish pond water added with honey is used as waste water for treatment, and its COD Cr It is 110mg / L.
[0056] Add hydrogen peroxide to waste water, the consumption of hydrogen peroxide is 12mL; then add oxidant, oxidant is ferrous ion, the consumption of oxidant is 1.5mL; Utilize white light to irradiate waste water at the same time, the irradiation time of white light is 2.5min; Stir rapidly, the reaction temperature of waste water is 60°C, wastewater pH=4.
[0057] The COD removal effect of the embodiment of the present invention 1-3 of table 1
[0058] Example 1 Example 2 Example 3 COD Cr (before processing)
700mg / L 70mg / L 110mg / L COD Cr (after processing)
660mg / L 0.0mg / L 0.0mg / L COD removal rate 94％ 100％ 100％
[0059] It can be seen from Table 1 that the method of the present invention has a good removal effect on COD in organic wastewater and can effectively decompose organ...
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Abstract
The invention discloses a method for degrading complex organic matters in wastewater by using a white lightirradiation assisted ferrous oxidation method. The method comprises the following steps: adding hydrogenperoxide into wastewater containing complex organic matters, adding an oxidant, irradiating the wastewater by using white light, and quickly stirring the wastewater to obtain the oxidantwhich is ferrous ions. According to the method for degrading complex organic matters in wastewater by using the white lightirradiation assisted ferrous oxidation method, the white light is used for assisting irradiation, so that the quantity of .OH is increased, the oxidation efficiency is greatly improved, the degradation of organic matters in the wastewater is promoted, the consumption of ferrous ions is reduced, and a relatively high utilization rate of hydrogenperoxide is kept; a complex formed by Fe3+ and an intermediate product generated in the organic matterdegradation process is a photoactive substance and can be continuously degraded under white light irradiation, so that the mineralization degree of the organic matter is more sufficient.
Description
technical field [0001] The invention relates to the technical field of organic wastewater treatment, in particular to a method for degrading complex organic matter in wastewater by assisted ferrous oxidation by white light irradiation. Background technique [0002] The degradation of organic pollutants can reduce or disappear the concentration of organic pollutants in the water body. At the same time, it consumes dissolved oxygen in the water, and even causes the water body to be hypoxic, black, smelly, dead fish and anaerobic bacteria multiply. [0003] The degradation process of organic pollutants is mainly the result of the physical, chemical and biological effects of water on pollutants: physical effects mainly include dilution, adsorption, precipitation, and coagulation of pollutants by water, resulting in a decrease in the concentration of pollutants. Chemical action is the chemical reaction between pollutants and water components to reduce the concentration of polluta...
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