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A prediction method for the degradation rate of organic pollutants in the actual water UV advanced oxidation process

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

Active Publication Date: 2022-07-12
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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  • A prediction method for the degradation rate of organic pollutants in the actual water UV advanced oxidation process
  • A prediction method for the degradation rate of organic pollutants in the actual water UV advanced oxidation process
  • A prediction method for the degradation rate of organic pollutants in the actual water UV advanced oxidation process

Examples

Experimental program
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Effect test

Embodiment 1

[0160] Example 1. Measure the free radical reaction capacity of different actual water bodies and the UV / H of actual water bodies 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 background water composition, and add the probe MB to the [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 substitutes, probes [MB] 0 =5mgL -1 , obtain the initial system of simulated water body; use UV / H 2 O 2 (MFPS as photoreactor, [H 2 O 2 ] 0 = 25mg L -1 , the UV intensity is 3.98×10 -4 einstein m -2 s -1 , the water circulation temperature is 25 °C) process to degrade the initial system of the simulated water body, and the concentration of MB in the solution of different concentrations of the water matrix substitute substance during the degradation...

Embodiment 2

[0172] Embodiment 2, actual water body UV / Cl 2 The organic pollutant degradation rate prediction and experimental verification in the process treatment are tested according to the method in Example 1, and the test conditions and results are as follows:

[0173] (1) Use the water matrix substitute substance BA to simulate the background water composition, and add the probe MB to the [BA] 0 = 0, 10, 20, 40, 60, 80 μM in aqueous solutions of different concentrations of water-based substitutes, 0.5 mM nitrobenzene was added to mask HO · , probe [MB] 0 =5μmol L -1 , obtain the initial system of simulated water body; use UV / Cl 2 (MFPS as photoreactor, [Cl 2 ] 0 =5mgL -1 , the UV intensity is 3.98×10 -4 einstein m -2 s -1 , the water circulation temperature is 25 °C) process to degrade the initial system of the simulated water body, and the concentration of MB in the solution of different concentrations of the water matrix substitute substance during the degradation process ...

Embodiment 3

[0184] Example 3. Actual water UV / S 2 O 8 2- Prediction and experimental verification of degradation rate of organic pollutants in process treatment

[0185] Test according to the method in Example 1, and the test conditions and results are as follows:

[0186] (1) Use the water matrix substitute substance BA to simulate the background water composition, and add the probe MB to the [BA] 0 = 0, 5, 10, 20, 30, 40 μM in aqueous solutions of various concentrations of water-based substitutes, with 0.5 mM nitrobenzene added to mask HO · , probe [MB] 0 =5μmol L -1 , obtain the initial system of simulated water body; use UV / S 2 O 8 2- (MFPS as photoreactor, [S 2 O 8 2- ] 0 = 200mg L -1 , the UV intensity is 3.98×10 -4 einstein m -2 s -1 , the water circulation temperature is 25 °C) process to degrade the initial system of the simulated water body, and the concentration of MB in the solution of different concentrations of the water matrix substitute substance during the...

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Abstract

The invention discloses a method for predicting the degradation rate of organic pollutants in an actual water body ultraviolet advanced oxidation process. The method of the invention comprises the following steps: (1) adding the probe into the solution of the water matrix substitute substance of different concentrations, degrading the probe by an ultraviolet advanced oxidation process, and measuring the degradation rate of the probe; taking the free radical reaction capacity of the water substrate substitute substance solution of different concentrations as the horizontal Coordinate, take the reciprocal of the probe degradation rate as the ordinate, and make a standard curve; (2) Add the probe to the actual water sample, measure the actual water probe degradation rate, and combine with the standard curve to obtain the actual water background matrix free radical reaction capacity; (3) According to the free radical reaction capacity of the actual water background matrix, combined with the secondary reaction rate constant of target pollutants and free radicals, the degradation rate of organic pollutants was obtained. The present invention has accurate prediction results, solves problems such as difficulty in transporting water samples, lack of advanced instruments on site, etc., and can carry out evaluation of the removal efficiency of pollutants in the advanced ultraviolet 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, and belongs to the technical field of environmental protection water treatment. Background technique [0002] Antibiotics, endocrine disruptors and other trace pollutants in water have received extensive attention due to their high solubility, strong stability and harmful effects on human body. Advanced oxidation processes (AOPs) have emerged as an effective technology for the degradation of organic pollutants due to the generation of highly reactive free radicals. Ultraviolet (UV)-based advanced oxidation processes (UV-AOPs) have been widely used in the removal of trace pollutants in water over the past few decades. According to the different oxidants, UV-based advanced oxidation processes are divided into UV / hydrogen peroxide advanced oxidation processes (UV / H 2 O 2 ), UV / chlorine advanced oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/18C02F101/30C02F101/38
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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