A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water

A disinfection by-product, brominated nitrogen-containing technology, applied in water pollutants, chemical instruments and methods, water/sewage treatment, etc., to achieve the effects of convenient operation, simple design, and economical brominated nitrogen-containing disinfection by-products.

Active Publication Date: 2018-07-27
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Compared with chlorinated N-DBPs, brominated N-DBPs were discovered later and received less research. However, toxicological studies in recent years have found that the toxicity of brominated N-DBPs is much higher than that of chlorinated N-DBPs. Therefore, , for raw water with high bromide content (generally greater than 50 μg / L), in order to ensure people's drinking water safety, it is necessary to carry out comprehensive system control on brominated N-DBPs

Method used

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  • A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water
  • A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water
  • A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water

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Embodiment 1

[0058] Such as figure 1 as shown, figure 1 It is a schematic flow chart of the method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water provided by the embodiment of the present invention. A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water, comprising the steps of: adjusting the pH of drinking water with an initial dissolved organic nitrogen concentration of 0.5 mg / L and a bromide ion concentration of 50 μg / L to 8, using hydrogen The sodium oxide solution adjusts the pH value, the volume of drinking water is 40ml, and then irradiates with ultraviolet light from a low-pressure mercury lamp with a wavelength of 254nm and a power of 15W. The ultraviolet lamp is used to irradiate the reactor in parallel, and the irradiation dose is 20mJ / cm 2 , the irradiation time is 60min, the distance between the UV lamp and the water body is not more than 40cm, then add hydrogen peroxide with ...

Embodiment 2

[0062] A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water, comprising the steps of: adjusting the pH of groundwater with an initial dissolved organic nitrogen concentration of 2 mg / L and a bromide ion concentration of 100 μg / L to 7, using sodium hydroxide solution Adjust the pH value, the volume of the water body is 40ml, and then use the medium-pressure mercury lamp ultraviolet light with a wavelength of 190nm and a power of 15W to irradiate the reactor, and the ultraviolet lamp is used to irradiate the reactor in parallel, and the irradiation dose is 600mJ / cm 2 , the irradiation time is 5min, the distance between the UV lamp and the water body is not more than 40cm, then add hydrogen peroxide with a concentration of 120mg / L, the hydrogen peroxide is excited by ultraviolet light to generate strong oxidative hydroxyl radicals to the precursors of brominated N-DBPs Remove, complete the degradation of the precursors of bromin...

Embodiment 3

[0066] A method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water, comprising the following steps: adjusting the pH of effluent from a sewage treatment plant with an initial dissolved organic nitrogen concentration of 1 mg / L and a bromide ion concentration of 70 μg / L to 9, using hydrogen The sodium oxide solution adjusts the pH value, the volume of the water body is 40ml, and then irradiates with ultraviolet light from a high-pressure mercury lamp with a wavelength of 235nm and a power of 15W. The ultraviolet lamp is used to irradiate the reactor in parallel in the air, and the irradiation dose is 400mJ / cm 2 , the irradiation time is 40min, the distance between the UV lamp and the water body is not more than 40cm, then add hydrogen peroxide with a concentration of 65mg / L, and the hydrogen peroxide is excited by ultraviolet light to generate strong oxidative hydroxyl radicals to the precursors of brominated N-DBPs Remove, complete t...

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Abstract

The invention discloses a method for inhibiting forming of bromo nitrogenous disinfection byproducts in water. The method comprises the following steps that firstly, the pH value of a water sample is controlled, ultraviolet irradiation treatment is adopted, and an oxidizing agent is added; then chloramine disinfection is carried out; finally, aeration treatment is carried out, and the water sample with bromo nitrogenous disinfection byproducts in water removed is obtained. Hydrogen peroxide used in the method is environmentally friendly and economical, secondary pollution can be avoided, only micro-aeration is needed without complex subsequent treatment, and the taste of water is hardly changed; the requirement for ultraviolet is not high, and no high energy cost is brought; in addition, a treatment device is simple in design, convenient to operate and capable of being used for treating drinking water, underground water, effluent of sewage treatment plants, industrial water and the like. The method for inhibiting forming of bromo nitrogenous disinfection byproducts in water is safe, efficient, broad in spectrum and economical.

Description

technical field [0001] The invention belongs to the technical field of water treatment and relates to a method for inhibiting the formation of brominated nitrogen-containing disinfection by-products in water. Background technique [0002] Drinking water safety is a major livelihood issue related to thousands of households. Drinking water disinfection is an indispensable treatment measure to ensure drinking water safety. The widely used chlorine disinfection process can effectively kill bacteria and viruses, but it will also produce harmful disinfection side effects. Products (DBPs). With the advancement of drinking water analysis technology and people's concern about the harm of DBPs in drinking water to human body, more and more DBPs in drinking water have been identified. Among them, nitrogen-containing disinfection by-products (N-DBPs) with strong toxicity are the most typical. [0003] At present, the halogenated N-DBPs that have received more attention mainly include:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08C02F101/36
CPCC02F1/24C02F1/32C02F1/50C02F1/58C02F1/66C02F1/722C02F9/00C02F2101/36C02F2201/3221C02F2201/3222C02F2305/023
Inventor 楚文海褚腾飞高乃云丁顺克
Owner TONGJI UNIV
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