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Method for treating organic matter sewage through cooperation of ionic liquid and hydrogen peroxide

A technology of ionic liquid and hydrogen peroxide, which is applied in oxidized water/sewage treatment, chemical instruments and methods, water treatment of special compounds, etc., can solve problems such as high cost and unsuitable for large-scale sewage treatment

Active Publication Date: 2020-04-24
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The efficiency of biochemical method to degrade organic matter can reach 50-80%, but the cost is high and it is not suitable for the treatment of large amounts of sewage

Method used

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  • Method for treating organic matter sewage through cooperation of ionic liquid and hydrogen peroxide
  • Method for treating organic matter sewage through cooperation of ionic liquid and hydrogen peroxide
  • Method for treating organic matter sewage through cooperation of ionic liquid and hydrogen peroxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The drawing of embodiment 1 standard curve

[0049] Take seven 25mL volumetric flasks, add 0.00, 0.25, 0.50, 1.00, 2.00, 3.00, 4.00mL of aniline standard solution respectively, add water to 10mL, and shake well. Add 0.6 mL of 10% potassium bisulfate solution to adjust the pH to 1.5-2.0 (measured with precision pH test paper), add 1 drop of 5% sodium nitrite solution, shake well, and let stand for 3 minutes. Add 0.5 mL of 2.5% ammonium sulfamate solution, shake fully, and let stand for 3 min. After all the bubbles are removed, add 1.0mL of 2% NEDA solution, dilute to the mark with water, shake well, and let stand for 30min.

[0050] At a wavelength of 545mm, use a 10mm cuvette to measure the absorbance with water as a reference. Take the measured absorbance minus the absorbance of the blank test as the abscissa, and the corresponding aniline content as the ordinate to draw a standard curve, see figure 1 .

[0051] The obtained data is processed by regression, and the...

Embodiment 2

[0052] Calculation of embodiment 2 degradation rate

[0053] Take 30mL of aniline simulated sewage, add hydrogen peroxide and ionic liquid for degradation reaction. Take 0.4 mL of the reacted solution in a 25 mL volumetric flask, add water to 10 mL, and shake well. Add 0.6mL of 10% potassium bisulfate solution to adjust the pH to 1.5-2.0 (determined by precision pH test paper), add 1 drop of 5% sodium nitrite solution, shake well, and let stand for 3 minutes. Add 0.5 mL of 2.5% ammonium sulfamate solution, shake fully, and let stand for 3 min. After all the bubbles are removed, add 1.0mL of 2% NEDA solution, dilute to the mark with water, shake well, and let stand for 30min. At a wavelength of 545mm, measure the content of aniline in the water sample with a visible light spectrophotometer, and calculate the degradation rate as follows:

[0054]

[0055] in:

[0056] C 1 is the initial concentration of aniline sewage (mg / L);

[0057] C 2 is the concentration of anilin...

Embodiment 3

[0060] The influence of initial concentration on the degradation rate of aniline in the process of degrading aniline by hydrogen peroxide alone in embodiment 3

[0061] Prepare 30mL of aniline simulated sewage with initial concentrations of 5.0mg / L, 10.0mg / L, 15.0mg / L, 20.0mg / L, 25.0mg / L, and 30.0mg / L respectively, initial pH value of 6.0, hydrogen peroxide The amount of the added amount is 0.2mL, the reaction temperature is room temperature (about 18°C), and the reaction time is 30min. The degradation effect of aniline alone with hydrogen peroxide under different initial concentrations is figure 2 shown.

[0062] Depend on figure 2 It can be seen that the degradation rate of aniline increases with the increase of the initial concentration of aniline simulated sewage within the concentration range of 5.0mg / L-30.0mg / L, that is, a higher initial concentration is conducive to its degradation, and a lower initial concentration On the contrary, the degradation rate was low, but...

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Abstract

The invention discloses a method for degrading organic sewage through cooperation of ionic liquid and hydrogen peroxide, belongs to the technical field of environment protection, and aims to determinethe optimal process condition of degrading aniline by hydrogen peroxide by changing the influence of factors such as the amount of added hydrogen peroxide, the pH value of a solution, the initial concentration of aniline wastewater, reaction time and the like on the aniline degradation effect and adopting an orthogonal test method. On the basis, the influence of changing the amount of the added ionic liquid on the aniline degradation effect is studied; the optimal process conditions for degrading aniline by the ionic liquid in cooperation with hydrogen peroxide are determined as follows: theconcentration of the ionic liquid is 0.6 g / L, the addition amount of hydrogen peroxide is 0.3 mL, the time is 10 min, the pH value is 6, the initial concentration of aniline wastewater is 30 mg / L, theroom temperature is about 18 DEG C, and the degradation rate is 96.2%. Finally, it is found that the degradation rate of the ionic liquid in cooperation with hydrogen peroxide is high, and the treated aniline sewage reaches the national first-grade discharge standard.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for synergistically treating organic sewage with ionic liquid and hydrogen peroxide. Background technique [0002] With the rapid development of industry, the number of sewage types has increased rapidly, and the pollution of water bodies has become increasingly serious. The composition and types of organic sewage are more complex and more difficult to deal with. [0003] For example, municipal sludge anaerobic ammonium oxidation effluent and landfill leachate are high-concentration, high-pollution and refractory organic sewage. These waters contain aerobic organic pollutants and various metals and ammonia nitrogen compounds. The concentration of COD and BOD in this water quality is as high as tens of thousands, which is much higher than that of urban sewage. [0004] In addition, there are non-chlorinated aromatic compounds such as naphthalene and phe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72C02F101/30C02F101/38
CPCC02F1/722C02F1/66C02F2101/30C02F2101/38C02F2305/023Y02W10/10
Inventor 贲永光周少奇
Owner SOUTH CHINA UNIV OF TECH
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