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A method for quantitative detection of hydroxyl radical concentration in fenton decomposition system

A technology for quantitative detection and free radicals, which is applied in the measurement of color/spectral characteristics, and analysis by making materials undergo chemical reactions, can solve the problems of quantitative detection of hydroxyl radical concentration interference, inaccurate detection results, etc., and achieve accurate quantification The effect of detection, low price and simple operation

Active Publication Date: 2017-11-10
HUAWEI TEHCHNOLOGIES CO LTD
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Problems solved by technology

[0009] The purpose of the present invention is to solve the H in the Fenton decomposition system 2 o 2 For the problem of interference in the quantitative detection of the concentration of hydroxyl radicals in the Fenton decomposition system, which makes the detection results inaccurate, a method for quantitative detection of the concentration of hydroxyl radicals in the Fenton decomposition system is provided

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  • A method for quantitative detection of hydroxyl radical concentration in fenton decomposition system
  • A method for quantitative detection of hydroxyl radical concentration in fenton decomposition system

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specific Embodiment approach 1

[0050] Specific embodiment one: the present embodiment is a kind of method that quantitatively detects the concentration of hydroxyl radicals in the Fenton decomposition system and is completed according to the following steps:

[0051] 1. ①. Set the concentration of 100mL to 30mmol L -1 H 2 o 2 The solution is heated to 20°C-90°C, and then the reaction temperature is 20°C-90°C and the stirring speed is 300r·min -1 ~600r·min -1 FeSO 4 , to obtain a mixed solution A;

[0052] FeSO in the mixed solution A described in step 1. 4 The concentration is 5mmol·L -1 ;

[0053] ②. Put the mixed solution A at a reaction temperature of 20°C to 90°C and a stirring speed of 300r·min -1 ~600r·min -1 Under reaction, when mixing solution A in H 2 o 2 When the concentration is lower than the critical concentration, add DMSO to mixed solution A to obtain mixed solution B; add distilled water to mixed solution B to make the volume of mixed solution B 60mL;

[0054] The concentration o...

specific Embodiment approach 2

[0076] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the critical concentration described in step one ② is 500 μmol L -1 . Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0077] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step 1., the concentration of 100mL is 30mmol L -1 H 2 o 2 The solution was heated to 60°C, and then the reaction temperature was 60°C and the stirring speed was 500r·min -1 FeSO 4 , to obtain mixed solution A. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A method for quantitatively detecting the concentration of hydroxyl radicals in a Fenton decomposition system relates to a method for quantitatively detecting the concentration of hydroxyl radicals in a solution. The purpose of the invention is to solve the problems of expensive equipment, complex operation and difficult quantitative detection of OH concentration used in the existing method for detecting OH concentration in H2O2 solution. Method: 1. Prepare the solution to be tested; 2. Draw the standard curve; 3. Obtain the regression equation; 4. Calculate the concentration of hydroxyl radicals in the extract to be tested according to the regression equation in step 2, that is, complete a quantitative detection Fenton's method for the concentration of hydroxyl radicals in the decomposition system. The invention determines the critical concentration of H2O2, avoids the influence of high-concentration H2O2 on the spectrophotometric detection method based on the Russell reaction mechanism, and greatly improves the detection accuracy. The invention can obtain a method for quantitatively detecting the concentration of hydroxyl free radicals in a Fenton decomposition system.

Description

technical field [0001] The invention relates to a method for quantitatively detecting the concentration of hydroxyl radicals in a solution. Background technique [0002] The Fenton system has unique advantages in the treatment of organic pollutants and is an advanced oxidation technology with great application prospects. The Fenton system’s ability to degrade pollutants mainly comes from the OH generated during the reaction; the equation is Fe 2+ +H 2 o 2 → Fe 3+ +·OH+HO - ;·OH plays an important role in many fields such as atmospheric photochemistry, life science, environmental science, and chemical synthesis. Quantification of ·OH concentration in liquid phase system has always been a hot and difficult research point. Many researchers at home and abroad have done a lot of research in this area. has been reported to contain H 2 o 2 The detection methods of OH concentration in solution include: electron spin resonance method, electrochemical method, fluorescence met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01N21/75
Inventor 赵海谦王忠华高杏存武传燕李栋毛前军刘立君刘晓燕
Owner HUAWEI TEHCHNOLOGIES CO LTD
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