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Method for removing 2, 2, 4, 4-tetrabromodiphenyl ether in water

A tetrabromodiphenyl ether, water removal technology, applied in chemical instruments and methods, water pollutants, water treatment of special compounds, etc., can solve problems such as low degradation rate, achieve accelerated removal, good catalytic degradation effect, and good removal. effect of effect

Active Publication Date: 2017-09-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a method for removing 2,2,4,4-tetrabromodiphenyl ether in water, to solve the problem that the degradation rate of BDE-47 in water is lowered by using white rot bacteria alone

Method used

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  • Method for removing 2, 2, 4, 4-tetrabromodiphenyl ether in water

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Embodiment 1

[0036] refer to figure 1 , the embodiment of the present application provides a method for removing 2,2,4,4-tetrabromodiphenyl ether in water, including:

[0037] adding Phanerochaete chrysosporium and rhamnolipid to water containing 2,2,4,4-tetrabromodiphenyl ether to obtain a mixed solution;

[0038] Shake the mixture to remove 2,2,4,4-tetrabromodiphenyl ether in the water.

[0039] Phanerochaete chrysosporium is a typical white-rot fungus. Studies have shown that Phanerochaete chrysosporium plays an important role in removing refractory organic matter in the environment. This is mainly because the bacteria can produce three important extracellular enzymes - lignin peroxidase (LiP), manganese peroxidase (MnP) and laccase (Lac). These three enzymes can effectively catalyze the ring-opening and further degradation of refractory organic matter in the environment. At the same time, the spherical Phanerochaete chrysosporium spheres in the shaking culture process have a certain ...

Embodiment 2

[0062] refer to Figure 8 , the embodiment of this application provides another method for removing BDE-47 in water.

[0063] The specific implementation steps are the same as in Example 1, and the difference from Example 1 is that in this example, 0.5 g of glucose is added to each conical flask, so that the concentration of glucose in each bottle reaches 10 g / L.

[0064] Depend on Figure 9 It can be seen that when adding glucose, it shows the same rule as that without adding glucose. Low concentration (0.05CMC, 0.1CMC) of RL can promote the removal rate of Phanerochaete chrysosporium to BDE-47, while high concentration (0.5CMC) CMC, the RL of 1.0CMC) has certain inhibitory effect to Phanerochaete chrysosporium to BDE-47, but has basically all reached complete removal to BDE-47; This can combine Figure 14 and Figure 15 Analysis showed that adding glucose was beneficial to the growth of Phanerochaete chrysosporium, and better cell morphology was more conducive to the remo...

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Abstract

The invention discloses a method for removing 2, 2, 4, 4-tetrabromodiphenyl ether in water. The method comprises the following steps: adding phanerochaete chrysosporium and rhamnolipid to water containing 2, 2, 4, 4-tetrabromodiphenyl ether to obtain a mixed solution; shaking and culturing the mixed solution; and removing 2, 2, 4, 4-tetrabromodiphenyl ether in water. The phanerochaete chrysosporium can secrete a plurality of exoenzymes, particularly lignin peroxidase (LiP), manganese peroxidase (MnP) and laccase (Lac); the three enzymes have an excellent catalytic degradation effect on refractory organic compounds; and the biosurfactant rhamnolipid can effectively promote enzymatic activities of three exoenzymes LiP, MnP and Lac, and promote the phanerochaete chrysosporium to remove BDE-47 in a water body. The method provided by the invention has an excellent removal effect on the BDE-47 in the water body, and has a removal rate of 90% or more; and besides, the rhamnolipid is an environment-friendly surfactant which does not cause secondary pollution to environment.

Description

technical field [0001] The application relates to the technical field of sewage treatment, in particular to a method for removing 2,2,4,4-tetrabromodiphenyl ether from water. Background technique [0002] 2,2,4,4-Tetrabromodiphenyl ether (BDE-47) is a commonly used brominated flame retardant because it is widely used in electronics, electrical appliances, chemicals, construction, transportation, textiles, petroleum and mining and other fields, resulting in its widespread distribution in different environmental media such as soil, water, sediment, and atmosphere, and the frequency of detection is increasing. Studies have shown that BDE-47 has high lipophilicity, low water solubility and low vapor pressure, can be scaled up along the food chain, and can migrate long distances in the environment. It has neurotoxicity, reproductive and developmental toxicity, immunotoxicity, carcinogenic toxicity, and interferes with the endocrine system. It can be seen that the long-term prod...

Claims

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Application Information

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IPC IPC(8): C02F3/34C02F101/34C02F101/36
CPCC02F3/34C02F3/342C02F2101/34C02F2101/36C02F2305/04
Inventor 刘智峰邵彬彬钟华曾光明李志刚刘洋刘玉杰蒋艺林
Owner HUNAN UNIV
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