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Method for removing brominated-flame-retardant pollutant in water

A technology of brominated flame retardants and pollutants, which is applied in the design and operation of columnar adsorption devices, can solve the problems of carcinogenesis, impact on brain and bone development, and small removal effect, so as to improve flow state, save pressure demand, and improve efficiency effect

Active Publication Date: 2014-09-10
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brominated flame retardant pollutants can accumulate and amplify in the human body through various channels, which will have a certain impact on the development of the human brain and bones, and may also have carcinogenic effects
[0003] At present, the removal of brominated flame retardants is mainly concentrated in two aspects of biodegradation and physical and chemical degradation, and the conventional process of water treatment has little effect on its removal.

Method used

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  • Method for removing brominated-flame-retardant pollutant in water
  • Method for removing brominated-flame-retardant pollutant in water
  • Method for removing brominated-flame-retardant pollutant in water

Examples

Experimental program
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Effect test

Embodiment 1

[0023] (1) Use a plexiglass column with a diameter of 5 cm and a length of 40 cm to fill it with fillers. The fillers are 10 cm thick quartz sand and 20 cm thick magnetic ion exchange resin, and fully mix before filling the column. The 50μm microporous membrane prevents the loss of filler, and the water pump uses a vacuum pump with a lift of 8m;

[0024] (2) Before entering the water sample, run it with deionized water for 3.5 hours at a flow rate of 5ml / min, in order to clean the filler;

[0025] (3) The influent water sample contains 3.0mg / L tetrabromobisphenol-A, the flow rate of the whole device is controlled at 3.2ml / min, the effluent water sample is collected with a 50ml centrifuge tube, and is determined by high performance liquid chromatography and mass spectrometry The concentration of tetrabromobisphenol-A in effluent;

[0026] (4) Regeneration is carried out under alkaline conditions (pH=9-11), and the rejuvenating agent is a sodium chloride solution with a mass fr...

Embodiment 2

[0029] (1) Use a plexiglass column with a diameter of 5 cm and a length of 40 cm to fill it with fillers. The fillers are 10 cm thick quartz sand and 20 cm thick magnetic ion exchange resin, and fully mix before filling the column. The 50μm microporous membrane prevents the loss of filler, and the water pump uses a vacuum pump with a lift of 8m;

[0030] (2) Before entering the water sample, run it with deionized water for 3.5 hours at a flow rate of 5ml / min, in order to clean the filler;

[0031] (3) The influent water sample contains 1.0 mg / L of pentabromodiphenyl ether, the flow rate of the whole device is controlled at 2.2ml / min, the effluent water sample is collected in a 50ml centrifuge tube, and the effluent water is determined by high performance liquid chromatography and mass spectrometry. The concentration of tetrabromobisphenol-A;

[0032] (4) Regeneration is carried out under alkaline conditions (pH=9-11), and the rejuvenating agent is a sodium chloride solution w...

Embodiment 3

[0035] (1) Use a plexiglass column with a diameter of 5 cm and a length of 40 cm to fill it with fillers. The fillers are 10 cm thick quartz sand and 20 cm thick magnetic ion exchange resin, and fully mix before filling the column. The 50μm microporous membrane prevents the loss of filler, and the water pump uses a vacuum pump with a lift of 8m;

[0036] (2) Before entering the water sample, run it with deionized water for 3.5 hours at a flow rate of 5ml / min, in order to clean the filler;

[0037] (3) The influent water sample contains 1.0mg / L decabromodiphenyl ether, the flow rate of the whole device is controlled at 2.0ml / min, the effluent water sample is collected in a 50ml centrifuge tube, and the effluent water is determined by high performance liquid chromatography and mass spectrometry. The concentration of tetrabromobisphenol-A;

[0038] (4) Regeneration is carried out under alkaline conditions (pH=9-11), and the rejuvenating agent is a sodium chloride solution with a...

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Abstract

The invention relates to a method for removing brominated-flame-retardant pollutant in water. According to the method, the brominated-flame-retardant pollutant is removed through coupling filtering by utilizing magnetic ion exchange resin, and concretely, the magnetic ion exchange resin and quartz sand are uniformly mixed according to a volume ratio of (3-5):(1-2) and are used as a filling material filling an ion exchange column for processing water containing the brominated-flame-retardant pollutant. Compared with the prior art, the method has the advantages of high efficiency, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and relates to the technology for removing brominated flame retardants by coupling sand with magnetic ion exchange resins and the design and operation of a set of columnar adsorption devices. Background technique [0002] Brominated flame retardants are one of the important additives for synthetic polymer materials, mainly used in plastics, textiles, electronics, electrical appliances, transportation packaging, building materials and other fireproof materials. Due to their good chemical stability, thermal stability, inertness and dielectric properties, they are widely produced and used in many countries and regions, thus also causing environmental media such as atmosphere, water, sediment and soil and related ecosystems severe pollution. Brominated flame retardant pollutants can accumulate and amplify in the human body through various channels, causing certain effects on the development ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/42
Inventor 唐玉霖李述琰于水利
Owner TONGJI UNIV
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