Method for removing brominated flame retardant in water body

A brominated flame retardant, water technology, applied in chemical instruments and methods, water pollutants, water/sewage treatment and other directions, can solve the problems of reducing COD value of sewage, complicated steps, high cost, and achieve good degradation effect, environmental protection Friendly, easy-to-use effects

Inactive Publication Date: 2019-02-22
无锡市政公用环境检测研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Chinese patent CN104961188A discloses a method for effectively removing tetrabromobisphenol A from water, including the following processing steps, (1) obtaining titanium dioxide porous microspheres with tetrabromobisphenol A molecular imprinting function; (2) adding FeSO 4 ·7H 2 O crystals and NaBH 4 solution to obtain nano-iron powder supported by titanium dioxide porous microspheres with tetrabromobisphenol A molecular imprinting function; (3) adding AgNO 3 Solution obtains the imprinted titanium dioxide porous microsphere that is loaded with nanometer iron-silver bimetallic nanoparticle; (5) The composite porous microspheres adsorbed with tetrabromobisphenol A are separated from the purified water w

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  • Method for removing brominated flame retardant in water body
  • Method for removing brominated flame retardant in water body

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Embodiment 1

[0023] A photocatalytic oxidation method for efficiently removing brominated flame retardants in water, comprising the following steps:

[0024] (1) Prepare 100 mL of tetrabromobisphenol A solution with an initial concentration of 2 mg / L in a beaker;

[0025] (2) Add a certain amount of sodium hypochlorite so that the available chlorine concentration is 1mmol / L;

[0026] (3) open the magnetic stirring device of reaction vessel and start magnetic stirring;

[0027] (4) Turn on the 280nm LED ultraviolet lamp to irradiate the mixed solution;

[0028] (5) Sampling in specific time interval, the concentration of tetrabromobisphenol A in the test sample, test result is as follows figure 2 shown. It can be seen that through 60min, the concentration of tetrabromobisphenol A is reduced from 2mg / L to 0.34mg / L, and the removal rate can reach 83%.

Embodiment 2

[0030] A photocatalytic oxidation method for efficiently removing brominated flame retardants in water, comprising the following steps:

[0031] (1) Prepare 100 mL of tribromophenol solution with an initial concentration of 2 mg / L in a beaker;

[0032] (2) Add a certain amount of sodium hypochlorite so that the available chlorine concentration is 3mmol / L;

[0033] (3) open the magnetic stirring device of reaction vessel and start magnetic stirring;

[0034] (4) Turn on the 280nm LED ultraviolet lamp to irradiate the mixed solution;

[0035] (5) Sampling in specific time interval, the concentration of tribromophenol in the test sample, test result is as follows figure 1 shown. It can be seen that through 60min, the concentration of tetrabromobisphenol A was reduced from 2mg / L to 0.41mg / L, and the removal rate was 80%.

Embodiment 3

[0037] A photocatalytic oxidation method for efficiently removing brominated flame retardants in water, comprising the following steps:

[0038] (1) Prepare 100 mL of bisphenol A solution with an initial concentration of 2 mg / L in a beaker;

[0039] (2) Add a certain amount of sodium hypochlorite so that its available chlorine concentration is 5mmol / L;

[0040] (3) open the magnetic stirring device of reaction vessel and start magnetic stirring;

[0041] (4) Turn on the 280nm LED ultraviolet lamp to irradiate the mixed solution;

[0042] (5) Samples are taken at specific time intervals to test the concentration of bisphenol A in the samples.

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Abstract

The invention relates to a method for removing a brominated flame retardant in a water body. An oxychlorination agent is added into wastewater containing the brominated flame retardant, irradiating isconducted through an ultraviolet light emitting diode, and chlorine radicals, hydroxyl radicals and the like are generated through short wave ultraviolet light in an activated mode to conduct oxidation removing on the brominated flame retardant. Compared with the prior art, the oxychlorination agent is adopted, the chlorine radicals are generated through the short wave ultraviolet light in the activated mode to conduct oxidation removing on organic matter, and a quick, efficient and environment-friendly novel technology for treating the brominated flame retardant in the wastewater is provided; and the method provided by the invention is environmentally friendly, secondary pollution is not generated, the good degrading effect can be achieved under the normal-temperature condition, operation is easy, and the method is suitable for removing organic pollutants such as the brominated flame retardant in the water body.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for removing brominated flame retardants in water. Background technique [0002] Brominated flame retardants (BFRs) are a class of organic compounds with excellent flame retardant properties and are widely used in plastic products, textiles, electronic products and building materials. Among them, tetrabromobisphenol A (TBBPA) is currently the brominated flame retardant with the largest output and highest consumption in China. During the production, transshipment, use and waste disposal of TBBPA, a large amount of TBBPA and other phenolic pollutants such as bisphenol A (BPA) and tribromophenol (TBP) are released from materials and enter the food chain and ecological environment. Threat to the natural environment and human health. [0003] At present, the removal methods for brominated flame retardants mainly include biological methods, physical methods, and advanced oxida...

Claims

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Application Information

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IPC IPC(8): C02F1/32C02F1/76C02F101/36
CPCC02F1/32C02F1/76C02F1/763C02F2101/36C02F2201/3222
Inventor 庄星宇周乙新谈振娇杜寿俊王慕张旻熊芬
Owner 无锡市政公用环境检测研究院有限公司
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