Method for treating waste water polluted by composite chlorophenol with coordination of visible light-laccase

A technology of collaborative treatment and treatment method, which is applied in the fields of light water/sewage treatment, energy waste water treatment, oxidized water/sewage treatment, etc. It can solve the problems of high equipment requirements, limitations, and high energy consumption, etc. simple craftsmanship

Inactive Publication Date: 2011-03-30
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, photocatalysis technology is limited by the dependence on light sources, so it cannot get rid of the adverse factors such as high energy consumption and high equipment requirements, and photocatalysis has certain degradation selectivity for chlorophenol pollutants with different molecular structures

Method used

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  • Method for treating waste water polluted by composite chlorophenol with coordination of visible light-laccase

Examples

Experimental program
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Effect test

Embodiment 1

[0024] In a cylindrical quartz photocatalytic reactor with a volume of 250 mL, a mixed aqueous solution with a volume of 200 mL of 10 mg / L of 2,4-dichlorophenol and 10 mg / L of pentachlorophenol was used as the target object. First, adjust the pH value to 3-5 with acetic acid and / or sodium hydroxide. Add 2 mL of an aqueous solution of laccase (copper-containing diphenol dioxide oxidoreductase, classification number EC 1.10.3.2) at a concentration of 1 mg / mL, and stir continuously to make it evenly mixed. Then add 0.1 g of titanium-bismuth composite visible light catalyst, and continue to stir for 30 minutes to make it reach adsorption equilibrium. The xenon lamp (Beijing Tianmai Henghui Light Source Electric Co., Ltd., XG1000, power 1000w) was placed vertically on the side of the quartz reactor, the distance between the xenon lamp and the reactor was 5cm, and a cut-off filter (Shanghai Moray Optoelectronics Co., Ltd., VIS -LPF400, cut-off wavelength 400nm) apart. Turn on the ...

Embodiment 2

[0027] The specific implementation method is the same as in Example 1. The amount of laccase was adjusted to 1 mL of laccase aqueous solution with a concentration of 1 mg / mL, and the amount of photocatalyst was adjusted to 0.04 g. After reacting for 3 hours, the degradation rate of 2,4-dichlorophenol was 43%, and that of pentachlorophenol was 51%. The enzyme-catalyzed reaction was continued for 7 hours, and the degradation rate of 2,4-dichlorophenol was 87.5%, and that of pentachlorophenol was 90.4%.

Embodiment 3

[0029] Specific implementation method embodiment 1. The amount of laccase was adjusted to 3 mL of laccase aqueous solution with a concentration of 1 mg / mL, and the amount of photocatalyst was adjusted to 0.15 g. After reacting for 3 hours, the degradation rate of 2,4-dichlorophenol was 81.1%, and that of pentachlorophenol was 90.2%. The enzyme-catalyzed reaction was continued for 7 hours, and the degradation rate of 2,4-dichlorophenol was 99.5%, and the degradation rate of pentachlorophenol was 99.9%.

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Abstract

The invention discloses a method for treating waste water polluted by composite chlorophenol with coordination of visible light-laccase, comprising the following steps: regulating the pH value of waste water polluted by the composite chlorophenol; mixing the laccase and the waste water to be treated, and carrying out the following processes such as photocatalysis treatment, light-tight treatment,photocatalyst extraction, filter, separation and recovery and the like. The laccase is utilized to catalyze low chloride chlorophenols in the waste water to enable the low chloride chlorophenols to fast aggregate to form sedimentation; and high chloride chlorophenols in the waste water are treated by photocatalysis and oxidation through visible lights to achieve the purpose of completely purifying composite chlorophenol waste water with high efficiency.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating sewage polluted by compound chlorophenols. Background technique [0002] Chlorophenol organic compounds are important industrial raw materials, widely used in the production of dyes, preservatives, pesticides and other chemical products, including sewage discharged from many industries such as petroleum-related industries, textiles, papermaking, printing and dyeing, and drinking water after chlorine gas disinfection Both contain chlorophenol compounds and their derivatives, which are a typical type of toxic organic pollutants in sewage. Chlorophenols have good chemical stability and thermal stability, and have potential toxicity of carcinogenicity, teratogenicity, and mutagenesis, and have strong toxic effects on organisms. They can be inhaled through skin and mucous membrane contact or invade organisms through the mouth. , After contacting with the protein ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/54C02F1/72
CPCY02W10/37
Inventor 牛军峰殷立峰沈珍瑶段延佩刘佳李晓锋
Owner BEIJING NORMAL UNIVERSITY
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