Method for predicting degradation rate of organic pollutants in actual water ultraviolet advanced oxidation process

A technology of advanced oxidation and degradation rate, applied in the direction of testing organic pollutants, water pollutants, chemical instruments and methods in water, etc., can solve the problems of large workload, long time and high cost

Active Publication Date: 2021-12-28
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional evaluation method needs to collect water samples on site and transport them to professional laboratories. This method has the following problems: (1) There are many factors affecting the performance of UV-AOPs process, such as the type of light source, pollutants, oxidants, water matrix, etc. , which makes the workload of laboratory evaluation huge; (2) It is necessary to operate some professional experimental instruments, such as collimated beam meter (qCBA), liquid chromatography mass spectrometry (HPLC-MS), etc. ; (3) high cost and long time

Method used

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  • Method for predicting degradation rate of organic pollutants in actual water ultraviolet advanced oxidation process
  • Method for predicting degradation rate of organic pollutants in actual water ultraviolet advanced oxidation process
  • Method for predicting degradation rate of organic pollutants in actual water ultraviolet advanced oxidation process

Examples

Experimental program
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Effect test

Embodiment 1

[0160] Embodiment 1, measure the free radical reaction capacity of different actual water bodies and actual water body UV / H 2 o 2 Prediction and Experimental Verification of Degradation Rate of Organic Pollutants in Process Treatment

[0161] (1) Use the water matrix substitute substance IPA or p-CBA to simulate the composition of the background water body, and add the probe MB to [IPA] 0 = 0, 10, 20, 40, 60, 80, 160, 320 μM or [p-CBA] 0 = 0, 5.0, 10, 15, 20 μM in aqueous solutions of different concentrations of water-based surrogate substances, probe [MB] 0 = 5 mg L -1 , to obtain the initial system of the simulated water body; using UV / H 2 o 2 (MFPS as photoreactor, [H 2 o 2 ] 0 = 25 mg L -1 , the UV light intensity is 3.98×10 -4 einstein m -2 the s -1 , the water circulation temperature is 25°C) process to degrade the initial system of simulated water body, measure the concentration of MB in different concentrations of water matrix substitute substance solution ...

Embodiment 2

[0173] Embodiment 2, actual water body UV / Cl 2 Organic pollutant degradation rate prediction and experimental verification are tested according to the method in Example 1 in the process treatment, and the test conditions and results are as follows:

[0174] (1) Use the water matrix substitute substance BA to simulate the composition of the background water body, and add the probe MB to [BA] 0 = 0, 10, 20, 40, 60, 80μM of different concentrations of water-based substitute substances in aqueous solution, add 0.5mM nitrobenzene to mask HO · , probe [MB] 0 =5 μmol L -1 , to obtain the initial system of the simulated water body; using UV / Cl 2 (MFPS as photoreactor, [Cl 2 ] 0 = 5 mg L -1 , the UV light intensity is 3.98×10 -4 einstein m -2 the s -1 , the water circulation temperature is 25°C) process to degrade the initial system of simulated water body, measure the concentration of MB in different concentrations of water matrix substitute substance solution during the degr...

Embodiment 3

[0185] Embodiment 3, actual water body UV / S 2 o 8 2- Prediction and Experimental Verification of Degradation Rate of Organic Pollutants in Process Treatment

[0186] Test according to the method in embodiment 1, test condition and result are as follows:

[0187] (1) Use the water matrix substitute substance BA to simulate the composition of the background water body, and add the probe MB to [BA] 0 = 0, 5, 10, 20, 30, 40 μ M in the aqueous solution of different concentrations of water-based substitute substances, add 0.5 mM nitrobenzene to mask HO · , probe [MB] 0 =5 μmol L -1 , to obtain the initial system of the simulated water body; using UV / S 2 o 8 2- (MFPS as photoreactor, [S 2 o 8 2- ] 0 =200mg L -1 , the UV light intensity is 3.98×10 -4 einstein m -2 the s -1 , the water circulation temperature is 25°C) process to degrade the initial system of simulated water body, and measure the concentration of MB in different concentrations of water matrix substitute ...

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Abstract

The invention discloses a method for predicting the degradation rate of organic pollutants in an actual water ultraviolet advanced oxidation process. The method comprises the following steps: (1) adding a probe into water matrix substitute substance solutions with different concentrations, degrading by using an ultraviolet advanced oxidation process, and measuring the degradation rate of the probe; making a standard curve by taking the free radical reaction capacity of the water matrix substitute substance solutions with different concentrations as a horizontal coordinate and the reciprocal of the degradation rate of the probe as a vertical coordinate; (2) adding the probe into an actual water sample, determining the degradation rate of the actual water body probe, and combining the standard curve to obtain the actual water body background matrix free radical reaction capacity; and (3) obtaining the degradation rate of the organic pollutants according to the actual water body background matrix free radical reaction capacity in combination with the secondary reaction rate constant of the target pollutants and the free radicals. The method is accurate in prediction result, solves the problems of difficulty in water sample transportation, lack of advanced instruments on site and the like, and can be used for evaluating the efficiency of removing pollutants in an ultraviolet advanced oxidation process.

Description

technical field [0001] The invention relates to a method for predicting the degradation rate of organic pollutants in an actual water body ultraviolet advanced oxidation process, belonging to the technical field of environmental protection water treatment. Background technique [0002] Trace pollutants such as antibiotics and endocrine disruptors in water have attracted widespread attention because of their high solubility, strong stability, and harmfulness to humans. Advanced Oxidation Processes (AOPs) are an effective technique for the degradation of organic pollutants due to the generation of highly reactive free radicals. Over the past decades, ultraviolet (UV)-based advanced oxidation processes (UV-AOPs) have been widely used in the removal of trace pollutants in water. According to the different oxidants, the UV-based advanced oxidation process is divided into UV / hydrogen peroxide advanced oxidation process (UV / H 2 o 2 ), UV / chlorine advanced oxidation process (UV / C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72C02F1/76G16C20/10G01N21/31G01N33/18C02F101/30C02F101/38
CPCC02F1/32C02F1/722C02F1/76C02F1/72G16C20/10G01N21/31G01N33/1826C02F2101/30C02F2101/38C02F2101/40Y02A20/152
Inventor 李梦凯强志民黄妍妍
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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