Method for removing brominated flame retardant in water body

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...

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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 with an external magnet, and the imprinted titanium dioxide porous microspheres loaded with nano-iron-silver bimetallic nanoparticles after separation are transferred In the photocatalytic reaction pool equipped with a light source, mercury lamp ultraviolet irradiation treatment is carried out. This method has complicated steps and high cost

[0008] Chinese patent CN205076933U discloses a domestic sewage advanced treatment device, through the setting of gas compressor, mercury lamp ultraviolet and chlorine-containing oxidant inlet, the organic matter in the treated sewage is further reduced, and the COD value and BOD of the treated sewage are greatly reduced 5 value, but not for brominated flame retardants in water

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