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Treatment method for methyl mercury polluted water

A treatment method and methylmercury technology, applied in water/sewage multi-stage treatment, neutralized water/sewage treatment, water/sludge/sewage treatment, etc., to achieve the effect of eliminating methylmercury pollution

Inactive Publication Date: 2014-10-22
何华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no effective way to completely remove and control methylmercury in water bodies

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A treatment method for methylmercury polluted water, comprising the following steps:

[0017] (1) Use a cation resin exchanger for ion exchange. The height of the exchanger is 3 meters, and it is equipped with 6 tons of macroporous mercapto cation resin. The water flow containing methylmercury cations flows into the ion exchanger for ion exchange at a flow rate of 5 tons per hour. When it is detected that the methylmercury content in the tail liquid of the exchanger exceeds 0.00005mg / L, the cationic resin in the exchanger is taken out and put into the regeneration tank for resin regeneration;

[0018] (2) The regeneration solution is to add sodium chloride to the 8% stannous chloride solution to prepare a mixed solution containing saturated sodium chloride, and regenerate it under stirring conditions. The ratio of regeneration solution and resin is 1:5, and stir The time is 60 minutes and the temperature is 40°C. After the regeneration is completed, the resin and the m...

Embodiment 2

[0023] A treatment method for methylmercury polluted water, comprising the following steps:

[0024] (1) Use a cation resin exchanger for ion exchange. The height of the exchanger is 3 meters, and it is equipped with 6 tons of macroporous mercapto cationic resin. The water flow containing methylmercury cations flows into the ion exchanger for ion exchange at a flow rate of 7 tons per hour. When it is detected that the methylmercury content in the tail liquid of the exchanger exceeds 0.00005mg / L, the cationic resin in the exchanger can be taken out and put into the regeneration tank for resin regeneration.

[0025] (2) The regeneration solution is to add sodium chloride to a 10% stannous chloride solution to prepare a mixed solution containing saturated sodium chloride, and perform regeneration under stirring conditions. The ratio of regeneration solution to resin is 1.5:5. Stir The time is 50 minutes and the temperature is 45°C. After the regeneration is completed, the resin ...

Embodiment 3

[0030] A treatment method for methylmercury polluted water, comprising the following steps:

[0031] (1) Use a cation resin exchanger for ion exchange. The height of the exchanger is 3 meters, and it is equipped with 6 tons of macroporous mercapto cationic resin. The water flow containing methylmercury cations flows into the ion exchanger for ion exchange at a flow rate of 9 tons per hour. When it is detected that the methylmercury content in the tail liquid of the exchanger exceeds 0.00005 mg / L, the cationic resin in the exchanger can be taken out and put into a regeneration tank for resin regeneration.

[0032] (2) The regeneration solution is to add sodium chloride to a 12% stannous chloride solution to prepare a mixed solution containing saturated sodium chloride, and perform regeneration under stirring conditions. The ratio of regeneration solution to resin is 2:5. Stir The time is 40 minutes and the temperature is 45°C. After the regeneration is completed, the resin and...

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PUM

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Abstract

The invention discloses a treatment method for methyl mercury polluted water. The treatment method comprises the following steps: introducing water containing methyl mercury into a cationic resin exchanger, and stopping exchanging when the concentration of methyl mercury in a water solution flowing from the cationic resin exchanger is greater than 0.00005mg / L; taking out cationic resin, utilizing a saturated sodium chloride mixed liquor of 8-12% stannous chloride as regenerated liquid, and performing regeneration under a mixing condition, wherein the ratio of the regenerated liquid to the resin is (1-2) to 5, the mixing time is 40-60 minutes, and the temperature is 40-45 DEG C; separating the resin from mercury-containing liquid after regeneration is ended, returning the regenerated resin to the resin exchanger to recycle, and feeding the mercury-containing liquid into a sedimentation basin; adjusting the pH of the obtained mercury-containing liquid to be greater than 10 by using sodium hydroxide, and filtering the mercury-containing liquid to obtain mercury-containing sediments; smelting the mercury-containing sediments by using a smelting furnace at high temperature of 560 DEG C, recovering mercury vapor, and condensing the vapor, so as to obtain a metal mercury product. By adopting the treatment method, methyl mercury pollution in water can be removed, and the methyl mercury can be converted into metal mercury to recycle.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a treatment method for methylmercury polluted water. [0002] Background technique [0003] Mercury is a silvery white shiny heavy liquid, chemically stable, insoluble in acid and alkali. Mercury can evaporate at room temperature, and mercury vapor and mercury compounds are highly toxic (chronic). Mercury has a long and diverse history of use. China is a major country with mercury reserves. Among them, the mercury deposits in Wanshan District, Tongren City, Guizhou Province are concentrated, accounting for more than 80% of the country's total. In the past 50 years, due to the mining and smelting of mercury mines in Wanshan, a total of waste gas has been emitted. 024×10 10 m 3 (mercury content is 109-3o4mg / m 3 ); mercury-containing wastewater 5.192×10 7 m 3 (Mercury content is 0.09-11.86mg / L, the national standard is <0.001mg / L); mercury-containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/42C02F1/66C02F101/30
Inventor 何华
Owner 何华
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