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Testing method of content of peroxymonosulfate in water

A determination method and sulfate technology, which are applied in material analysis, color/spectral property measurement, and chemical reaction of materials by observing the influence on chemical indicators, etc., can solve the complicated operation steps and the measurement results. Large error, narrow application range and other problems, to achieve the effect of reducing cost, reducing the error of measurement results, and wide application range

Active Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex and cumbersome operation steps, long reaction time, large error in measurement results, narrow application range and high equipment cost in the existing determination method, and provide a method for determining the content of persulfate in water

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  • Testing method of content of peroxymonosulfate in water
  • Testing method of content of peroxymonosulfate in water
  • Testing method of content of peroxymonosulfate in water

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specific Embodiment approach 1

[0024] Specific embodiment one: the assay method of peroxosulfate content in a kind of water of the present embodiment, it is to carry out according to the following steps:

[0025] Step 1: Make a standard curve: add divalent cobalt compound solution and azo dye solution into ultrapure water to obtain mixture A, then adjust the pH value of mixture A to 4-8, measure the azo dye in mixture A The absorbance value at the characteristic peak place is denoted as a; Add peroxysulfate standard sample in the mixture A of gained, make peroxysulfate form concentration gradient; Then after mixture A is carried out decolorization reaction 0.5-5min, measure the even after decolorization The absorbance value of the nitrogen dye at the characteristic peak is denoted as b; the difference between a and b is the abscissa, and the concentration of the standard sample of persulfate is the ordinate to establish a calibration curve; wherein the divalent cobalt compound solution concentration is 10-1...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the divalent cobalt compound described in step 1 and step 2 is one of cobalt sulfate, cobalt nitrate or cobalt chloride or several of them according to Mixtures in any ratio. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the azo dyes described in step one and step two are all methyl orange, methylene blue, rhodamine B, acid orange 2 or formazan base purple. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a testing method of peroxymonosulfate, in particular to a testing method of the content of peroxymonosulfate in the water, and solves the problems that a conventional testing method is complex in operation step, long in reaction time, large in testing result error, narrow in application range, and high in equipment cost. The testing method comprises the following steps: first, creating a standard curve; second, measuring the absorbance values of azo-dyes at the characteristic peak before / after a to-be-tested water sample is added; third, substituting the difference values of the values measured in the second step into the standard curve in the first step to calculate the content of the peroxymonosulfate in the to-be-tested water sample. The testing method is simple and practicable, the testing result error is small, the testing time is short, the application range is wide, and the cost is low. The testing method is applicable to fields of surface water treatment, industrial wastewater treatment, and surface water and soil remediation.

Description

technical field [0001] The invention relates to a method for measuring permonosulfate, in particular to a method for determining the content of permonosulfate in water based on the use of divalent cobalt to activate permonosulfate to generate sulfate radicals to degrade azo dyes. Background technique [0002] In recent years, the advanced oxidation method based on activating persulfate to generate free radicals has been widely used to degrade refractory toxic organics and inactivate aquatic bacteria. Common methods for activating persulfate include metal ion activation methods represented by divalent cobalt and ferrous ions, CoFe 2 o 4 and CuFe 2 o 4 The heterogeneous activation method represented by spinel magnetic materials, and the external energy activation method represented by ultraviolet radiation, microwave radiation and ultrasonic cavitation. In these activation systems of persulfate, it is necessary to measure the remaining persulfate to investigate its utiliza...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31
Inventor 马军邹景谢鹏超张剑桥
Owner HARBIN INST OF TECH
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