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Method for integrated treatment of dyeing wastewater by using magnetic activated carbon

A magnetic activated carbon, printing and dyeing wastewater technology, applied in the field of water treatment, can solve the problems of difficult separation of wastewater, non-regeneration, large amount of mud production, etc., to achieve the effect of improving treatment efficiency, improving treatment capacity and reducing treatment costs

Inactive Publication Date: 2016-03-30
HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the shortcomings of the conventional powdered activated carbon process and the Fenton process, and proposes a method that solves the disadvantages of difficult separation, easy loss, and inability to regenerate the conventional PAC and treated wastewater, and improves the conventional Fenton process that requires continuous addition of iron salts. A method of integrated treatment of printing and dyeing wastewater with magnetic activated carbon, which has the advantages of simplicity, high efficiency, and economy, etc.

Method used

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  • Method for integrated treatment of dyeing wastewater by using magnetic activated carbon
  • Method for integrated treatment of dyeing wastewater by using magnetic activated carbon
  • Method for integrated treatment of dyeing wastewater by using magnetic activated carbon

Examples

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Embodiment 1

[0024] Example 1: A method for the integrated treatment of printing and dyeing wastewater with magnetic activated carbon, in which H 2 o 2 Composition of Fe 3 o 4 -H 2 o 2 The Fenton-like system enables the regeneration of magnetic activated carbon. Magnetic activated carbon is powder activated carbon: PAC and nano-iron oxide: Fe 3 o 4 of composite materials. Fe 3 o 4 The / PAC mass ratio is 2. Magnetic activated carbon is produced by chemical co-precipitation method. 3+ / Fe 2+ (Molar ratio)=2 In the reaction system, powdered activated carbon is used as a carrier to complete the reaction by adding lye medium;

[0025] The Fe 3+ / Fe 2+ (molar ratio)=2 reaction system is FeCl3 / FeSO4 (molar ratio)=2 or FeCl3 / FeCl2 (molar ratio)=2;

[0026] The lye medium is NaOH;

[0027] Powdered activated carbon is PAC.

[0028] The specific steps of the chemical co-precipitation method are:

[0029] a. Dry the PAC in an oven at 100°C for 24 hours;

[0030] b. Mix 400mL of FeC...

Embodiment 2

[0034] Example 2: The method of integrated magnetic activated carbon treatment of printing and dyeing wastewater (methylene blue): 1. Under constant temperature conditions, put 500mL of methylene blue wastewater with a certain concentration in a constant temperature water bath for mechanical stirring, and add a certain amount of PAC-Fe 3 o 4 Composite materials, adjust the pH value to the set value, and add the corresponding amount of H at the same time 2 o 2 , Regular sampling, determination of water dye concentration and COD value. 2. At the end of each cycle of experiments, use NdFeB magnets to separate and recover the magnetic activated carbon, and clean the magnetic activated carbon with ultrapure water for the next cycle of reaction. The magnetic activated carbon was recycled and used 9 times, and the COD and dye concentration of the effluent were measured in each cycle.

[0035] figure 1 , 2 Indicates that when using PAC-Fe 3 o 4 Synchronous dosing of H in the sy...

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Abstract

The present invention relates to a method for integrated treatment of dyeing wastewater by using magnetic activated carbon. According to the method, an improved magnetic activated carbon adsorption process and an Fe3O4-H2O2 based Fenton-like technology are organically combined based on the preparation of a PAC-Fe3O4 composite material, and a dyeing wastewater treatment technology integrated with adsorption and regeneration is proposed, and the materials after adsorption can be synchronously regenerated by using the Fenton-like technology in the processing system. According to the method, the adsorption property of the PAC-Fe3O4 composite material and the Fe3O4 Fenton-like catalyst characteristic are fully used. At the time that the material performs adsorption effect on the dye pollutants, H2O2 is synchronously added to form a Fe3O4-H2O2 Fenton-like system to perform regeneration, so that the processing ability of the system is effectively improved, and the processing cost is lowered. The advantages of a pure PAC process and a conventional Fenton process are organically combined, so that the shortages that the conventional PAC and the treated wastewater are difficult to separate are easily to be lost, and cannot be regenerated are solved, and the problems that ferric salt needs to be continuously added in the conventional Fenton process, and the sludge output amount is large are improved. The method has the advantages of being simple, efficient, economical and the like, thereby having a large potential market in dyeing wastewater treatment applications.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a printing and dyeing wastewater treatment method and an adsorption material. Background technique [0002] Printing and dyeing wastewater is one of the main sources of water pollution in my country. It has the characteristics of large water volume changes, deep chroma, high alkalinity, and complex components. Although conventional biological treatment methods have low treatment costs, the treatment process is slow and occupies a large area. It cannot guarantee the standard discharge of printing and dyeing effluent; in comparison, physical adsorption method has obvious advantages in terms of site requirements, operation management and treatment effect, and is one of the main technologies for printing and dyeing wastewater treatment. Powdered activated carbon is a commonly used adsorbent. It has a large specific surface area and strong adsorption capacity. Therefore, it is widely use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/72B01J20/20B01J20/28B01J20/30C02F103/30C02F101/38
Inventor 郭海娟周家晖马放
Owner HIT YIXING ACAD OF ENVIRONMENTAL PROTECTION
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