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Method for rapidly evaluating pollution level of chlorobenzene substances in water body

A technology of pollution level and evaluation method, which is applied in the direction of analysis by chemical reaction of materials and material analysis by observing the influence on chemical indicators, which can solve the problems of long time and inability to confirm the concentration level of chlorobenzenes. , to achieve the effect of simple operation

Pending Publication Date: 2020-04-21
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods are all laboratory testing methods, which need to send samples to the laboratory for testing, which takes a long time. When a water pollution incident occurs, it is impossible to judge whether it is chlorobenzene pollution in a timely and effective manner, and it is also impossible to confirm the chlorobenzene pollution. Concentration Levels of Class Substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Configure the color reaction system: add 0.05 mL formaldehyde solution to 0.9 mL concentrated sulfuric acid system, mix well and set aside.

[0025] Standard product reaction process: take 0.05 mL of chlorobenzene substances with a concentration of 50, 100, 200, and 500 mg / L, and add them to a 0.95 mL color development system respectively. With the increase of the concentration of chlorobenzene, the color of the concentrated sulfuric acid system changes from Light pink gradually deepens to reddish brown.

[0026] The process of identification and evaluation of polluted water samples: pipette polluted water samples with a rubber dropper, drop one drop (about 0.05 mL) into the color development system, after mixing evenly, the sulfuric acid system will appear reddish brown, compared with the standard product reaction system, It was found that the color of the sample reaction system was similar to that of the 200 mg / L standard reaction system, indicating that the concentra...

Embodiment 2

[0028] Configure the color reaction system: add 0.05 mL formaldehyde solution to 0.9 mL concentrated sulfuric acid system, mix well and set aside.

[0029] Standard product reaction process: take 0.05 mL of chlorobenzene substances with a concentration of 50, 100, 200, and 500 mg / L, and add them to a 0.95 mL color development system respectively. With the increase of the concentration of chlorobenzene, the color of the concentrated sulfuric acid system changes from Light pink gradually deepens to reddish brown.

[0030] The process of identification and evaluation of polluted water samples: pipette the polluted water sample with a rubber dropper, drop one drop (about 0.05 mL) into the color development system, after mixing evenly, the reaction system has no color change, indicating that there is no chlorobenzene in the water sample The presence of similar substances or the concentration of chlorobenzene substances is less than 100 mg / L.

Embodiment 3

[0032] Configure the color reaction system: add 0.05 mL formaldehyde solution to 0.9 mL concentrated sulfuric acid system, mix well and set aside.

[0033] Standard product reaction process: Take 0.05 mL of chlorobenzene substances with concentrations of 10, 25, 50, 100, 200, and 500 mg / L, and add them to 0.95 mL color development system respectively. The color of the sulfuric acid system gradually deepens from light pink to reddish brown.

[0034] The process of identification and evaluation of polluted water samples: pipette polluted water samples with a rubber dropper, drop one drop (about 0.05 mL) into the color development system, after mixing evenly, the reaction system is light pink, compared with the standard product reaction system, It was found that the color of the sample reaction system was similar to that of the 100 mg / L standard reaction system, indicating that the concentration of chlorobenzenes in the water sample was around 100 mg / L.

[0035] In the above exa...

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Abstract

The invention discloses a method for rapidly evaluating a pollution level of chlorobenzene substances in a water body. According to the theory, chlorobenzene substances and formaldehyde can generate red substances under the action of concentrated sulfuric acid, the concentrated sulfuric acid-formaldehyde solution is in red color, and the concentration level of the concentrated sulfuric acid-formaldehyde solution is in direct proportion to the color development degree. The method specifically comprises the steps of preparing a color development system, preparing a standard chlorobenzene compound solution, preparing a colorimetric standard substance, rapidly detecting chlorobenzene compounds in the water body, and determining the concentration of the chlorobenzene compounds through colorimetry. According to the method, whether the polluted water body contains high-concentration chlorobenzene compounds or not is rapidly identified through the chromogenic reaction, the operation is simple,whether the polluted water body contains the high-concentration chlorobenzene substances or not can be rapidly and visually judged, and a judgment method for rapidly, efficiently and timely identifying the chlorobenzene substances is provided for a water pollution event; and on-site rapid evaluation of the pollution level of the chlorobenzene substances in the water body is realized, timely and effective reference is provided for the concentration condition of the chlorobenzene substances in a water pollution event, and support is provided for emergency treatment.

Description

technical field [0001] The invention relates to the technical field of water body pollutant detection, in particular to a method for quickly evaluating the pollution level of chlorobenzene substances in water bodies. Background technique [0002] Chlorobenzenes are important raw materials for organic chemicals such as fuels, pharmaceuticals, and pesticides. They were widely used as raw materials for the production of DDT pesticides before they were banned. Currently, chlorobenzenes are widely used in the synthesis of benzene series intermediates. Researchers often detect relatively high concentrations of chlorobenzenes in wastewater discharged from enterprises that use chlorobenzenes as raw materials. At the same time, most of the drinking water in our country adopts chlorine disinfection method. During the chlorination process, some chlorinated hydrocarbons will form chlorobenzenes, which will cause chlorobenzenes to continuously enter the environment. Chlorobenzenes have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 王蓓丽郭丽莉宋倩阎思诺李书鹏沈宗泽何玮淑瞿婷
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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