Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination

A technology of disinfection by-products and persulfate, which is applied in water/sewage treatment, chemical instruments and methods, light water/sewage treatment, etc. Simple operation, obvious effect

Inactive Publication Date: 2012-03-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of pollution by highly toxic nitrogen-containing disinfection by-products often detected in drinking w

Method used

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  • Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination
  • Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination
  • Method for removing nitrogenous disinfection byproducts in water on basis of persulfate/light combination

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specific Embodiment approach 1

[0011] Specific embodiment one: this embodiment is based on the method of persulfate / photolinking to remove nitrogen-containing disinfection by-products in water according to the following steps: add persulfate to water containing nitrogen-containing disinfection by-products, and then irradiate light for 10S ~20min, that is to complete the removal of nitrogen-containing disinfection by-products in water; the persulfate is potassium persulfate, sodium persulfate, ammonium persulfate, calcium persulfate, magnesium persulfate, potassium monopersulfate, sodium monopersulfate, monopersulfate Ammonium sulfate, calcium monopersulfate or magnesium monopersulfate; the dosage of persulfate is 1-10:1 according to the molar ratio of persulfate to disinfection by-products containing nitrogen in water; the light source used for light irradiation is low-pressure mercury Lamp, medium-pressure mercury lamp, high-pressure mercury lamp, amalgam ultraviolet lamp, halogen lamp, xenon lamp, black la...

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is that hydrochloric acid, nitric acid, ferrous chloride, ferric chloride, ferrous nitrate, ferric nitrate, ferrous sulfate, ferric sulfate, hydrogen peroxide can also be added One or several. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment two is that the molar equivalent ratio of the dosage of hydrogen peroxide to the dosage of persulfate is 0.1~1:1; The molar equivalent ratio of the dosage is 0.1-0.5:1; the dosage of the acid is such that the pH value of the water body is 4-8. Other steps and parameters are the same as in the second embodiment.

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Abstract

The invention discloses a method for removing nitrogenous disinfection byproducts in water on the basis of persulfate/light combination, and relates to a method for removing nitrogenous disinfection byproducts in water. The method for removing nitrogenous disinfection byproducts in water on the basis of persulfate/light combination comprises the following steps of: dosing persulfate in water including nitrogenous disinfection byproducts and then carrying out light irradiation. In the invention, persulfate or related composite chemicals are dosed in water and ultraviolet irradiation is utilized, so that abundant radicals are generated to attack the nitrogenous disinfection byproducts so as to realize denitrification and dehalogenation. The method provided by the invention has the advantages that the operation is simple, the effect is clear, the use is sage and no toxic byproduct is generated. By using the method, various nitrogenous disinfection byproducts such as acetonitrile, halogenated nitromethane, nitrosamine compounds, halogenated cyanogens, halogenated acetamide, halogenated pyrrole and organic chloramines can be thoroughly removed; and moreover, the method can be used for synchronously removing other organic matters and restraining and killing the microorganisms in the water.

Description

technical field [0001] The invention relates to a method for removing nitrogen-containing disinfection by-products in water. Background technique [0002] Chlorination disinfection is currently the most widely used disinfection technology around the world. It provides an effective guarantee for the biological safety of drinking water, but at the same time it produces toxic and harmful disinfection by-products, which pose a threat to the chemical safety of drinking water. Among them, conventional chlorinated disinfection by-products, such as trihalomethanes and haloacetic acids, have been included in the drinking water quality standards of various countries in the world and have been effectively controlled. In recent years, emerging disinfection by-products - nitrogen-containing disinfection by-products, such as: halogenated acetonitrile, halogenated nitromethane, halogenated acetamide, halogenated cyanogen, halogenated pyrrole and nitrosamines, etc., their The toxicity is 2...

Claims

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Application Information

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IPC IPC(8): C02F1/30C02F1/32C02F1/50C02F1/58C02F1/72
Inventor 马军方晶云关英红李旭春谢鹏超陈丽玮张静
Owner HARBIN INST OF TECH
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