Printing and dyeing wastewater treatment method

A technology for printing and dyeing sewage and treatment methods, which is applied in the direction of reducing water/sewage treatment, textile industry wastewater treatment, etc., can solve the problems of low efficiency, iron/water micro-electrolysis hardening, iron rust consumption, etc. The method is simple and easy to implement, and the effect of increasing the specific surface area

Active Publication Date: 2016-02-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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Problems solved by technology

[0005] However, in the process of treating printing and dyeing wastewater with reduced iron powder, there are the following problems: (1) Iron powder is often a commercial and standard brick; compared with reduced iron powder, the purity and activity of cast iron waste are poor, resulting in the need for Long treatment time can reach the standard of follow-up treatment; (2) this method has certain requirements on the pH value of printing and dyeing wastewater, which requires pH adjustment of large quantities of printing and dyeing wastewater, resulting in inconvenient practical application; (3) iron There is a serious compaction problem in water micro-electrolysis; although the use of nano-iron powder can prevent compaction to a certain extent, it also has a larger specific surface area, but the manufacture of nano-iron p

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  • Printing and dyeing wastewater treatment method
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  • Printing and dyeing wastewater treatment method

Examples

Experimental program
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Example Embodiment

[0032] Example 1:

[0033] In this embodiment, the printing and dyeing sewage is direct blue 2B dye water with a concentration of 200mg / L, and the iron-based amorphous alloy powder Fe 78 Si 9 B 13 , Iron-based crystalline alloy powder Fe 78 Si 9 B 13 , and commercial iron powder to treat the printing and dyeing sewage respectively.

[0034] (1) Iron-based amorphous alloy powder Fe 78 Si 9 B 13 preparation

[0035] Fe 78 Si 9 B 13 Is a component with a strong ability to form amorphous, the iron-based amorphous alloy powder Fe 78 Si 9 B 13 The preparation method is as follows:

[0036] (1) Fe 78 Si 9 B 13 Preparation of master alloy

[0037] Fe, Si and B elements with a purity of not less than 99% (weight percent) are used in the atomic ratio of 78:9:13, and the prepared raw material mixture is smelted in an electric arc furnace with an argon atmosphere adsorbed by titanium. More than 3 times, mix evenly, and obtain the master alloy ingot after cooling;

[0...

Example Embodiment

[0057] Example 2:

[0058] In this example, using Fe 77 Si 9 B 13 La 1 The iron-based amorphous alloy powder is used to treat the printing and dyeing wastewater.

[0059] Iron-based amorphous alloy powder Fe in the present embodiment 77 Si 9 B 13 La 1 The preparation method is basically the same as that in Example 1, except that the raw materials Fe, Si, B and La elements are dosed according to the atomic ratio of 77:9:13:1.

[0060] Similar to Example 1, to Fe 77 Si 9 B 13 La 1 The iron-based amorphous alloy powder was subjected to scanning electron microscope experiment and particle size analysis. like Image 6 As shown, the iron-based amorphous alloy powder is a uniform fine powder with an average particle size of 29.2 μm.

[0061] Similar to Example 1, the XRD figure of the iron-based amorphous alloy powder in the present embodiment shows that this alloy is an amorphous alloy, such as Figure 7 shown.

[0062] According to the method for processing printing...

Example Embodiment

[0063] Embodiment 3-7:

[0064] In embodiment 3-7, utilize Fe 73 Si 7 B 17 Mo 3 , Fe 73 Si 7 B 17 Nb 1 Gd 2 , Fe 75 Si 9 B 13 Nb 2 Tb 1 , Fe 75 Si 9 B 13 Tm 3 , Fe 77 Si 9 B 13 Y 1 The iron-based amorphous alloy powder is used to treat the printing and dyeing wastewater.

[0065] Iron-based amorphous alloy powder Fe in the present embodiment 73 Si 7 B 17 Mo 3 , Fe 73 Si 7 B 17 Nb 1 Gd 2 , Fe 75 Si 9 B 13 Nb 2 Tb 1 , Fe 75 Si 9 B 13 Tm 3 , Fe 77 Si 9 B 13 Y 1 The preparation method is basically the same as in Example 1, except that each element is dosed according to the atomic ratio of the corresponding molecular formula. The average particle sizes of the five powders are all between 20 and 40 μm.

[0066] Similar to Example 1, the XRD patterns of the iron-based amorphous alloy powders in Examples 3-7 show that these alloys are amorphous alloys, such as Figure 9 shown.

[0067] According to the method for processing printing and dy...

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Abstract

The invention provides a printing and dyeing wastewater treatment method. An iron-base alloy raw material being capable of forming an amorphous alloy strip is employed in the method and is processed to form an iron-base amorphous alloy strip. The iron-base amorphous alloy strip then is embrittled and smashed to obtain iron-base amorphous alloy powder. The iron-base amorphous alloy powder is used in printing and dyeing wastewater treatment. Compared with the prior art, the iron-base amorphous alloy powder has a high specific surface area and can form a nano porous structure on surface when being reacted with printing and dyeing wastewater. The nano porous structure can not only increase the specific surface area of the iron-base amorphous alloy further but also has the effects of adsorb azo dyes and reaction products during a reaction process, thereby increasing efficiency of the iron-base amorphous alloy powder in printing and dyeing wastewater treatment.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing sewage treatment, in particular to a treatment method for printing and dyeing sewage. Background technique [0002] Water treatment is an eternal subject for human beings. With the development of my country's economy, the national water consumption is increasing year by year, and the total amount of wastewater discharge is increasing. The increasing total amount of wastewater discharge increases the pressure on water treatment. The textile industry is a traditional pillar industry in my country. The "three wastes" discharged during the production process of the printing and dyeing industry, especially wastewater, will cause serious pollution to the environment if not properly treated. According to incomplete statistics, the daily discharge of printing and dyeing wastewater in my country is 4 to 6 million cubic meters. Printing and dyeing wastewater has the characteristics of large wa...

Claims

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Application Information

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IPC IPC(8): C02F1/70C22C45/02C02F103/30
Inventor 霍军涛甘卓然常春涛李润伟王新敏门贺
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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