Method for degrading smelly substance in water through oxidizing agent activated by ultraviolet light

An odorant and oxidant technology, which is applied in the application field of water treatment technology to achieve the effects of good degradation effect, easy storage and transportation, easy promotion and application

Inactive Publication Date: 2015-11-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports or patents on the use of UV-catalyzed persulfate to degrade odor and odor substances in water so far.

Method used

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  • Method for degrading smelly substance in water through oxidizing agent activated by ultraviolet light
  • Method for degrading smelly substance in water through oxidizing agent activated by ultraviolet light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Take 6 headspace vials containing 3gNaCl and 0.2mL of 2-isobutyl-3-methoxypyrazine (IBMP) at a concentration of 10ng / L, and prepare concentrations of 10, 20, 50, 100, 200 , 500ng / L of 2-MIB or GSM, and measure with gas chromatography-mass spectrometer (GC-MS: GasChromatography-MassSpectrometer), make a standard curve, such as figure 1 as shown, figure 1 The standard curve for measuring 2-MIB prepared by the internal standard method for the embodiment of the present invention, the internal standard substance is 2-isobutyl-3-methoxypyrazine (IBMP). The abscissa is A 2-MIB / A IBMP , represents the ratio of the peak area measured by the substance in gas chromatography-mass spectrometer (GC-MS: GasChromatography-MassSpectrometer), and its ordinate represents the concentration of the prepared 2-MIB, and its measured data trend The fitting equation of the line is y=1378.6x-16.077, where the linear coefficient is R 2 =0.9991, which can meet the measurement needs.

[00...

Embodiment 2

[0036] On the basis of embodiment 1 method, ultraviolet radiation intensity 410mj / cm 2 , the concentration of 2-MIB or GSM is 1000ng / L, the concentration of sodium persulfate is 1mM, react at room temperature, and the reaction time is 120min. The pH of the reaction was measured with a concentration of 1 x 10 -3 mol / L of hydrochloric acid or sodium hydroxide, adjust the pH of the solution to carry out experiments under the conditions of 3, 7, and 8, and the experimental results are shown in Table 2.

[0037] Table 2

[0038] pH value

[0039] In this embodiment, ultraviolet light is used to activate persulfate (sodium persulfate, etc.) under different pH conditions, which can effectively degrade odorous substances (2-MIB, GSM, etc.) Under certain conditions, it can effectively reduce the smell in water and purify water quality. Compared with Fenton oxidation method, ozone oxidation method, wet oxidation method and other methods, this method has the advantages of hig...

Embodiment 3

[0041] On the basis of embodiment 1 method, ultraviolet radiation intensity 410mj / cm 2, the concentration of 2-MIB or GSM is 1000ng / L, pH=7, react at room temperature, and the reaction time is 120min. Experiments were carried out under the conditions that the concentrations of sodium persulfate were 0.1 mM, 0.5 mM, 1 mM, and 1.5 mM, respectively. The degradation effects were measured respectively, and the measurement results are shown in Table 3.

[0042] table 3

[0043] Concentration of sodium persulfate (mM)

[0044] This embodiment utilizes the persulfate (sodium persulfate, etc.) of different concentrations to be activated by ultraviolet light, and degrades the smell and taste substances (2-MIB, GSM) etc. that are difficult to degrade in the water body. raised.

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Abstract

The invention discloses a method for degrading a smelly substance in water through an oxidizing agent activated by ultraviolet light. The method includes the following steps that an oxidizing agent solution is added into the water with the smelly substance, reaction is performed under illumination of the ultraviolet light, and sampling analysis is performed after the reaction to obtain the degradation result of the smelly substance in the water. The smelly substance is 2-methylisoborneol or geosmin, the oxidizing agent is persulfate or mono potassium peroxysulfate, and the illumination intensity of the ultraviolet light is 103 mj / cm<2>-410 mj / cm<2>. The method is environmentally friendly and will not generate secondary pollution, a good effect can be achieved at a normal temperature just by adding the reagent into the water with the smelly substance needing to be degraded under illumination of the ultraviolet light, the good degradation effect can be achieved no matter whether under neutral pH or acidic pH, it is unnecessary to arrange other devices, operation is simple, storage and transportation are easy, and the method can be used for degrading the smelly substance in the water.

Description

technical field [0001] The invention belongs to the application field of water treatment technology and relates to a method for degrading odor and smell substances in water. Background technique [0002] At present, many studies have been carried out at home and abroad on the degradation of odor and taste substances in drinking water, including the following methods: traditional techniques (coagulation, sedimentation, sand filtration), chemical oxidation, adsorption and biological treatment, etc. method. It can be seen that although the traditional process has some effects on the degradation of odor, it is not ideal, and it still needs to rely on other advanced treatment processes; although the use of chemical oxidants such as chlorine, ozone, chlorine dioxide and potassium permanganate can degrade some odor substances, However, the new substances generated by the oxidation of other substances by the oxidant or the residual oxidant itself also has an unpleasant odor; compar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/32C02F1/58
Inventor 黎雷赵来财董子萱李建峰郭海成贺玲郭婧轩张均刘建伟王帅锋
Owner TONGJI UNIV
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