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A kind of rush magnetic powder for dyeing wastewater treatment and its preparation method and application

A technology for magnetic powder and dyeing wastewater, applied in water/sewage treatment, adsorbed water/sewage treatment, water/sludge/sewage treatment, etc. Effect of specific surface area, improving adsorption rate and adsorption efficiency, and increasing dye adsorption capacity

Active Publication Date: 2022-04-12
WUHAN TEXTILE UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method realizes the reuse of ethanol-water system dye raffinate to a certain extent, as the number of times of repeated use increases, the amount of inactivated dye in the dye raffinate gradually increases, and the dyeing performance decreases accordingly. Can not fundamentally solve the recovery of dyestuffs in the dyeing residue

Method used

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  • A kind of rush magnetic powder for dyeing wastewater treatment and its preparation method and application
  • A kind of rush magnetic powder for dyeing wastewater treatment and its preparation method and application
  • A kind of rush magnetic powder for dyeing wastewater treatment and its preparation method and application

Examples

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preparation example Construction

[0041] A preparation method for rush magnetic powder for dyeing wastewater treatment, comprising the following steps:

[0042] S1. Put the rush powder in a hydrothermal reaction kettle, use water as the medium, take it out after hydrothermal reaction at 250-290°C for 1.5-2.5 hours, filter, wash, and dry to obtain the rush hydrothermal charcoal powder;

[0043] S2. Take ferric salt and ferrous salt, press Fe 3+ with Fe 2+ The molar ratio of substances is 1.5-2:1, and the iron ion solution is prepared;

[0044] S3. Add the rush hydrothermal charcoal powder obtained in step S1 to the iron ion solution obtained in step S2, then slowly add the alkali solution dropwise, age at a temperature of 55-85°C for 1-8 hours, and then filter , washing and drying to obtain the rush magnetic powder.

[0045] Through the above preparation method, the rush grass with abundant resources and excellent specific surface area and porosity is selected as the matrix adsorption material. First, the ru...

Embodiment 1

[0063] A rush magnetic powder for dyeing wastewater treatment, prepared by the following steps:

[0064] S1. Take 2g of rush powder and put it in a hydrothermal reaction kettle, add 50ml of deionized water, put it in an oven at 270°C, take it out after hydrothermal reaction for 2 hours, filter, wash until the filtrate is clear water, put it in an oven at 100°C Dry for 2 hours to obtain rush hydrothermal charcoal powder;

[0065] S2. Take 1.95g of ferrous sulfate and place it in a 500ml beaker, add 200ml of deionized water, stir at 400r / min at 70°C until dissolved, slowly add 3.9g of ferric chloride during stirring, and stir for 30min to obtain Iron ion solution;

[0066] S3. Add 1.624g rushes hydrothermal charcoal powder to iron ion solution, stir 30min, obtain reaction liquid; Then get 10g sodium hydroxide and dissolve in 50ml water, obtain concentration and be the sodium hydroxide aqueous solution of 20mg / ml, sodium hydroxide Slowly drip the aqueous solution into the react...

Embodiment 2 and 3 and comparative example 1 and 2

[0079] Compared with Example 1, the rush magnetic powders provided in Examples 2 and 3 and Comparative Examples 1 and 2 for dyeing wastewater treatment are different in that the temperature of the hydrothermal reaction in step S1 is as shown in Table 1 , the others are basically the same as in Embodiment 1, and will not be repeated here.

[0080] The preparation conditions and adsorption properties of table 1 embodiment 2 and 3 and comparative examples 1 and 2

[0081] sample Hydrothermal reaction temperature (℃) Adsorption rate(%) Example 2 265 80％ Example 3 290 95％ Comparative example 1 240 75％ Comparative example 2 300 94％

[0082] It can be seen from Table 1 that when the hydrothermal reaction temperature is lowered, the rushes can not fully react, so the adsorption rate is significantly reduced;

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Abstract

The invention provides a rush magnetic powder used for treating dyeing wastewater, a preparation method and application thereof. The preparation method comprises the following steps: placing the rush powder in a hydrothermal reaction kettle, using water as a medium, taking out the rush hydrothermal reaction at 250-290° C. for 2-4 hours, filtering, washing and drying to obtain the rush rush hydrothermal charcoal powder; Ferric and ferrous salts, by Fe 3+ with Fe 2+ The molar ratio of the substances is 1.5-2:1, and the iron ion solution is prepared; the rush hydrothermal charcoal powder is added to the iron ion solution, and then the alkali solution is slowly added dropwise, at the preset temperature, aged for the preset time, and then filtered , washing and drying to obtain the rush magnetic powder. The rush magnetic powder prepared by the invention has the advantages of cheap and easy-to-obtain raw materials, high specific surface area, easy recovery and repeated use, etc., and especially has good adsorption and decolorization effect on dyeing residual liquid of alcohol organic solvent and water blending system.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a rush magnetic powder for dyeing wastewater treatment, a preparation method and application thereof. Background technique [0002] With the continuous development of textile, leather and other industries, a large amount of dye wastewater is discharged into the water body environment. Due to the variety of industrial dyes and complex components, it is difficult to remove them from the water body, thereby disturbing and destroying the biological growth environment in the water body. Cause serious water pollution. Therefore, the treatment and recycling of dye wastewater is of great significance to the sustainable development of enterprises and environmental protection. At present, the commonly used dye wastewater treatment methods in industry mainly include physical, chemical and biological treatment methods. Among them, the adsorption method in the physi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/08B01J20/28009C02F1/281C02F2101/308
Inventor 夏良君周思婕付专张春华王阿明徐卫林
Owner WUHAN TEXTILE UNIV
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