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Light promoting dehalogenation compound medicament/light combined method for removing halogenated organic matters in water

A technology of halogenated organics and composite agents, which is applied in the direction of light water/sewage treatment, water pollutants, water/sewage treatment, etc., can solve the problems of low removal efficiency, high cost and limited use of halogenated organics, and achieve convenient management , improve utilization efficiency, and operate economically

Inactive Publication Date: 2011-08-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantage is that it can only remove some volatile organic compounds, but has no removal effect on soluble halogenated organic compounds such as trichloroacetic acid; secondly, this method has a relatively low removal efficiency for high-concentration halogenated organic compounds. The removal rate is high, and multi-stage gas treatment is required, and the cost is high; in addition, the secondary pollution gas generated by this method needs further treatment
This method can effectively remove organic matter such as vinyl chloride, but it is only effective in shallow aquifers, thus limiting its use

Method used

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  • Light promoting dehalogenation compound medicament/light combined method for removing halogenated organic matters in water
  • Light promoting dehalogenation compound medicament/light combined method for removing halogenated organic matters in water
  • Light promoting dehalogenation compound medicament/light combined method for removing halogenated organic matters in water

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specific Embodiment approach 1

[0024] Specific Embodiment 1: In this embodiment, the photocatalyzed dehalogenation compound agent / photolinking method for removing halogenated organic substances in water is carried out in the following manner: add photocatalyzed dehalogenate compound agent to water containing halogenated organic substances and stir, and then light Irradiation, that is to complete the removal of halogenated organic substances in water; the light-promoted dehalogenation compound agent consists of sodium sulfite, lithium sulfite, potassium sulfite, magnesium sulfite, calcium sulfite, ammonium sulfite, sulfurous acid, sodium pyrosulfite, pyrosulfite Lithium, potassium pyrosulfite, magnesium pyrosulfite, calcium pyrosulfite, ammonium pyrosulfite, sodium dithionite, lithium dithionite, potassium dithionite, magnesium dithionite, calcium dithionite, Ammonium dithionite, potassium iodide, sodium iodide, magnesium iodide, ammonium iodide, sodium hydroxide, potassium hydroxide, potassium persulfate, so...

specific Embodiment approach 2

[0035] Specific embodiment two: the difference between this embodiment and specific embodiment one is that light irradiation adopts ultraviolet light source, visible light source or high-energy ray light source, and the light source is ozone-free low-pressure mercury lamp, medium-pressure mercury lamp, high-pressure mercury lamp, amalgam Ultraviolet lamps, halogen lamps, xenon lamps, black lamps, vacuum ultraviolet lamps, X-rays, alpha rays, beta rays, or gamma rays. Others are the same as in the first embodiment.

[0036] Visible light in this embodiment includes sunlight and artificial sunlight.

[0037] In this embodiment, the light source needs to be equipped with appropriate electrical control equipment and power supply.

[0038] In this embodiment, the power of ultraviolet UV light irradiation can be selected arbitrarily, and it needs to be determined according to the actual needs of the system (system oxygen concentration, oxygen removal rate and operating cost).

[0...

specific Embodiment approach 3

[0040] Specific embodiment 3: The difference between this embodiment and specific embodiment 2 is that the light-promoted dehalogenation composite agent is added to the water containing halogenated organic matter and stirred, then light is irradiated, and aeration is carried out at the same time, that is, the removal of halogen in water is completed. Substitute organic matter. Others are the same as in the second embodiment.

[0041] The gas selected for aeration in this embodiment can be: air, oxygen, nitrogen, helium, argon, sulfur dioxide, ozone, nitrous oxide, and it is necessary to select a reasonable gas source for different target pollutants and systems.

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Abstract

The invention provides a light promoting dehalogenation compound medicament / light combined method for removing halogenated organic matters in water, which relates to a method for removing halogenated organic matters in water. The invention overcomes various defects existing in the process of removing halogenated organic matters in water by using the current gas stripping method, activated carbon adsorption method, electrochemical removing method, advanced oxidation method, transition metal catalytic reduction method, vacuum ultraviolet technique or permeable reactive barrier technique. The method of the invention comprises the following steps: adding the light promoting dehalogenation compound medicament into the water containing halogenated organic matters for stirring, and then, carrying out optical radiation. The method of the invention does not need multi-stage removal, does not need expensive oxidants and catalysts, does not generate secondary pollution, does not need expensive vacuum ultraviolet light sources and high-energy radiation sources, can utilize common and cheap ultraviolet pop light sources or even expanding to visible light sources, improves the utilization efficiency of the light energy, can quickly remove the halogenated organic matters, can conveniently design a reactor, meets the requirements of various water bodies, is convenient in management, and can ensure the safety of the water quality.

Description

technical field [0001] The invention relates to a method for removing halogenated organic matter in water. Background technique [0002] Halogenated organic compounds refer to organic compounds in which one or more Hs connected to C in the structure of organic compounds are replaced by halogens, including fluorinated, chloro, bromo and iodo organic compounds. Common halogenated organic compounds are: trifluoroacetic acid, perfluorooctane sulfonic acid, dichloromethane, chloroform, carbon tetrachloride, dichloroethane, tetrachloroethane, chloroethanol, monochloroacetic acid, dichloro Acetic acid, trichloroacetic acid, chlorobenzene, polybrominated biphenyls, polybrominated diphenyl ethers, chloramphenicol, diclofenac, clofibric acid, chlorophenol, p-chlorobenzoic acid, p-chloronitrobenzene, methyl bromide, ethyl bromide, Bromoalcohol, tribromoacetic acid, chlorodibromoacetic acid, bromobenzene, bromophenol, polybrominated biphenyls, polybrominated diphenyl ethers, iodane, io...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/58C02F1/30C02F101/36
CPCY02W10/37
Inventor 马军李旭春刘桂芳关英红陈丽玮方晶云张静
Owner HARBIN INST OF TECH
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