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Water treatment method for removing halogenated nitromethane in water by ultraviolet light

A nitromethane, ultraviolet light technology, applied in the direction of light water/sewage treatment, water/sewage treatment, adsorbed water/sewage treatment, etc., to achieve the effect of effective absorption, efficient removal, and promotion of heterocrack

Inactive Publication Date: 2016-12-14
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the defects and deficiencies of the generation of halonitromethane after the above-mentioned existing water pollution treatment technology, the present invention provides an effective, economical and feasible water treatment method for removing halonitromethane in water by ultraviolet light, that is, using ultraviolet disinfection Technology, while effectively disinfecting water bodies with neutral or alkaline pH, it can also remove halogenated nitrogen-containing disinfection by-products halogenated nitromethane in the water, so as to ensure the drinking health of drinking water

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  • Water treatment method for removing halogenated nitromethane in water by ultraviolet light

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specific Embodiment approach 1

[0028] In this embodiment, the water treatment method for removing halonitromethanes from water based on ultraviolet light is carried out as follows: light irradiation is carried out into the water containing halonitromethanes, and stirring is carried out, and the light intensity is determined according to actual needs. The irradiation of ultraviolet light adopts the flow type, and the outer wall of the ultraviolet light source needs to be protected by nested quartz tubes.

[0029] In this embodiment, low-pressure mercury lamps, medium-pressure mercury lamps, high-pressure mercury lamps, amalgam ultraviolet lamps, and halogen lamps can be used for light irradiation to meet the conditions of use. Xenon lamps, black lamps, vacuum ultraviolet lamps, X-rays, One of alpha rays or gamma rays.

specific Embodiment approach 2

[0030] The difference between this embodiment and the first embodiment is that the light irradiation adopts the immersion type, and the outer wall of the ultraviolet light source needs to be protected by nesting quartz tubes.

specific Embodiment approach 3

[0031] The difference between this embodiment and the first embodiment is that the light irradiation adopts the surface irradiation type, and the ultraviolet light source does not need to be protected by nesting quartz tubes. Treat pure water containing bromonitromethane (BNM), dichloronitromethane (DCNM), dibromonitromethane (DBNM) and trichloronitromethane (TCNM), and the pH conditions are 3 and 4 respectively , 5, 6, 7, 8, 9. At the same time, set up a group of control groups: under different pH conditions, dark treatment was carried out to the reaction solution, and the reaction time was 3 hours;

[0032] The results are attached figure 1 Shown, the method of the present invention is to 4 typical halonitromethanes in water---bromonitromethane (BNM), dichloronitromethane (DCNM), dibromonitromethane (DBNM), trichloronitromethane methane (TCNM). At pH 3-5, the removal rates of the four halonitromethanes are generally low; at pH 6-9, the removal efficiencies of monohalogena...

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Abstract

The invention discloses a water treatment method for removing halogenated nitromethane in water by ultraviolet light, and relates to a method for removing highly toxic nitrogenous disinfection byproduct namely halogenated nitromethane. The method is as below: irradiating UV light to water containing halogenated nitromethane and stirring. The invention does not require multiple removal, expensive oxidant or catalyst, does not produce secondary pollution, can use cheap ultraviolet spectrum light source to quickly remove halogenated nitromethane. A reactor can be conveniently designed to meet the needs of various water, so as to facilitate management and guarantee the security of water quality. The method can be applied to depth treatment of halogenated nitromethane-containing drinking water, sewage, swimming pool water and reclaimed water, which is subjected to conventional water plant treatment including flocculation, sedimentation, filtration, adsorption and sterilization, thereby reducing the concentration of toxic and harmful halogenated nitromethane; and the method is especially conducive to the guarantee water quality safety of drinking water and swimming water.

Description

technical field [0001] The invention relates to the technical field of water body pollution treatment, and more particularly relates to a water treatment method for removing halogenated nitromethanes by ultraviolet radiation. Background technique [0002] The formation of halonitromethane (HNM) is mainly related to the chlorination or chloramination of natural organic matter (NOM), sewage organic matter (EfOM), algae, amino acids, fatty amines, and human urine and sweat in swimming pools. Chlorination disinfection is a common and effective disinfection technology in China. However, along with chlorination disinfection is a series of chlorinated disinfection by-products, including halonitromethanes. Moreover, due to the inevitable presence of bromide ions in natural water bodies and domestic sewage, chloronitromethane can also be converted into bromonitromethane. Halonitromethanes are therefore commonly found in drinking water, sewage and swimming pool water. Nine HNMs ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08C02F1/32C02F101/38C02F103/42
CPCC02F1/32C02F9/00C02F2303/04C02F2201/3222C02F2201/32C02F2103/42C02F2001/007C02F2101/38C02F1/001C02F1/28C02F1/52Y02W10/37
Inventor 方晶云郭恺恒侯少东潘明玮
Owner SUN YAT SEN UNIV
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