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
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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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