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Irradiation method of degrading hexachlorobenzene in water

A technology of hexachlorobenzene and water body, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of no particularly ideal method, and can meet the treatment requirements, mild reaction conditions, cost reduction effect

Inactive Publication Date: 2005-07-13
NANJING UNIV
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  • Abstract
  • Description
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Problems solved by technology

At present, a lot of research has been done on the degradation and removal of hexachlorobenzene at home and abroad, but there is no particularly ideal method

Method used

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  • Irradiation method of degrading hexachlorobenzene in water

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Effect test

Embodiment 1

[0025] Embodiment 1: the conventional water body containing the hexachlorobenzene of 0.4mg / L, through 1.5MeV, the high-energy electron beam that the high-energy electron accelerator of 50mA produces, under the radiation dosage of 2kGy, the degradation of hexachlorobenzene can reach more than 80% rate, and the degradation products basically do not contain other harmful chlorobenzene compounds. Higher PH value can promote the effect of irradiation. Therefore, in the case of high PH value in the water body, it can be considered to reduce the irradiation dose to reduce the treatment cost.

Embodiment 2

[0026] Example 2: When the irradiation dose in Example 1 is changed to 10kGy, p-hexachlorobenzene can achieve a degradation rate of more than 90%. However, the cost of irradiation is greatly increased, and the irradiation dose should be selected according to the requirements of drinking water treatment in various places.

Embodiment 3

[0027] Example 3: The irradiation in Example 1 uses a source intensity of 500,000Ci 60 Co ray is irradiated, and other conditions remain unchanged, and the degradation effect is basically unchanged.

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Abstract

The irradiation method of degrading hexachlorobenzene in water is one high efficiency energy saving water treating technology. High energy electron beam or gamma ray radiated during the decay of radioactive atom is utilized to treat water containing hexachlorobenzene for degrading hexachlorobenzene.

Description

technical field [0001] The invention relates to a method for degrading hexachlorobenzene in water, in particular to a method for degrading hexachlorobenzene in water by irradiation. Background technique [0002] In 2001, organized by the United Nations Environment Program (UNEP), an international legally binding treaty on the control of 12 typical persistent organic compounds (POPs) was signed at the Swedish Ministerial Conference. my country is one of the signatories. [0003] In 2000, the United Nations Environment Program (UNEP) carried out an assessment of the Global Environment Facility project on PTS. Experts agreed that persistent toxic substances cannot be defined in simple words, although these substances do share the following commonality: organic (including metal-organic) substances ; Slowly degrades in the environment; Bioaccumulates; Toxic. [0004] Hexachlorobenzene is not only one of the 12 POPs listed in the above convention, but also a typical PTS. Hexachl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00
Inventor 郑正顾春晖杨光俊周忻王灿袁守军帖靖玺江芳郭照冰唐登勇
Owner NANJING UNIV
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