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Method for decolorizing dye wastewater

A technology for dye wastewater and wastewater, applied in chemical instruments and methods, biochemical equipment and methods, water pollutants, etc., can solve problems such as easy deactivation, and achieve the effect of uniform particle size

Pending Publication Date: 2020-05-12
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since laccase is a protein composed of amino acids, its molecular structure is very sensitive to the external environment, it is easily inactivated during use, and cannot be recycled from the reaction system for reuse

Method used

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  • Method for decolorizing dye wastewater
  • Method for decolorizing dye wastewater
  • Method for decolorizing dye wastewater

Examples

Experimental program
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Embodiment 1

[0086] A method for decolorizing dye wastewater, specifically: utilizing magnetic Cu(II) to chelate Fe 3 o 4 @C Nanoparticle-immobilized laccase decolorization of dye wastewater.

[0087] The preparation method of the magnetic copper (II) chelated ferric oxide@carbon nanoparticles comprises the following steps:

[0088] 1) Preparation of hydroxyl / carboxyl functionalized magnetic Fe 3 o 4 The operation process of @C nanoparticles is as follows:

[0089] 1-1) In a three-necked flask, dissolve 0.4mmol of ferrous chloride and 0.8mmol of ferric chloride in 50mL of water, and add 4mL of concentrated ammonia (28% concentration by mass) under stirring in a nitrogen atmosphere. Add ammonia water 3 times; first add 2mL concentrated ammonia water, react at 60°C for 20min, then add 1mL concentrated ammonia water at 60°C, react at 60°C for 20min, then add 1mL concentrated ammonia water, ℃ for 20 minutes, and finally heated up to 90 ℃ for 1 hour to prepare Fe 3 o 4 Nanoparticle suspe...

Embodiment 2

[0105] A method for the decolorization of dye wastewater, specifically: utilizing the magnetic Cu(II) chelated Fe prepared in Example 1 3 o 4 The method of @C nanoparticle immobilized laccase decolorization azo dye wastewater:

[0106] Prepare 0.1mol / L acetic acid buffer solution with pH=4.5; take 14mg ABTS and 50mg azo fluorescent pink and dissolve in 1000mL of the above-mentioned acetic acid buffer solution, the concentration of azo fluorescent pink is 50mg / L, as the azo fluorescent pink dye to be treated Wastewater; 4mg magnetic Cu(II) chelated Fe will be prepared by embodiment 1 3 o 4 The @C nanoparticle-immobilized laccase was dispersed into the above 8mL azo fluorescent pink dye wastewater, and reacted at 50°C for 1h under shaking conditions, and the decolorization rate of the azo fluorescent pink dye was measured by spectrophotometry.

[0107] Configure the acetic acid buffer solution of 0.1mol / L pH=4.5; Get 14mg ABTS and 20mg reactive red dye and be dissolved in 100...

Embodiment 3

[0110] A method for the decolorization of dye wastewater, specifically: utilizing the magnetic Cu(II) chelated Fe prepared in Example 1 3 o 4 The method of @C nanoparticle immobilized laccase decolorization anthraquinone dye wastewater:

[0111] Prepare 0.1mol / L acetic acid buffer solution with pH=4.5; take 14mg ABTS and 100mg anthraquinone dye Reactive Brilliant Blue-19 and dissolve them in 1000mL of the above acetic acid buffer solution to prepare 100mg / L anthraquinone dye solution; as the anthraquinone dye to be treated Wastewater; 4mg magnetic Cu(II) chelated Fe will be prepared by embodiment 1 3 o 4 @C nanoparticle-immobilized laccase was dispersed into the above 10ml anthraquinone dye solution, reacted at 50°C for 1 h under shaking conditions, and the decolorization rate of anthraquinone dye was measured by spectrophotometry.

[0112] Detection of the magnetic Cu(II) chelated Fe 3 o 4 The degradation rate of @C nanoparticle-immobilized laccase to reactive brilliant ...

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Abstract

The invention provides a method for decolorizing dye wastewater. The method comprises the following steps: firstly, preparing hydroxyl / carboxyl functionalized magnetic Fe3O4 (at) C nanoparticles by adopting a hydrothermal method; preparing magnetic Cu (II) chelated Fe3O4 (at) C nanoparticles through coordination adsorption of Cu<2+> ions, and finally preparing highly-stable, high-activity and reusable magnetic Cu (II) chelated Fe3O4 (at) C nanoparticle immobilized laccase through the coordination effect between laccase histidine residues and Cu (II). According to the invention, not only can triphenylmethane dye, azo dye and anthraquinone dye be degraded, but also the removal rate of the three dyes can reach 75%-99% within the concentration range of 5-200mg / L, and the composite material canbe repeatedly used for more than 10 times.

Description

technical field [0001] The invention belongs to the decolorization treatment of dye wastewater, in particular to a method for treating dye wastewater with immobilized laccase. Background technique [0002] With the rapid development of industry, the problem of wastewater treatment has become increasingly prominent and has become an urgent problem to be solved at the same time as industrial development. Among them, dye wastewater is considered to be one of the most difficult industrial wastewater due to its wide source, large discharge, deep color, high concentration, complex composition, large pH value change, and poor biodegradability. [0003] At present, the most widely used dyes are mainly three types: azo dyes, anthraquinone dyes, and triphenylmethane dyes. In the prior art, the methods of treating dye wastewater such as adsorption decolorization, catalytic oxidation, and combined process do have certain effects, but these treatment methods are high in cost, produce a ...

Claims

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Application Information

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IPC IPC(8): C02F3/34C12N11/14C02F101/30C02F101/32C02F101/34C02F101/38
CPCC02F3/342C02F3/348C12N11/14C12N9/0061C12Y110/03002C02F2101/308C02F2101/327C02F2101/38C02F2101/34
Inventor 陈志明李志国汪春梅
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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