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Application of modified steel slag in treating printing and dyeing wastewater by activating persulfate

A technology for activating persulfate and printing and dyeing wastewater, which is applied in the direction of oxidized water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc. It can solve the problems of waste of steel slag resources and difficult treatment of printing and dyeing wastewater, and achieve reduction Disposal costs, good reusability, and the effect of improving resource utilization

Pending Publication Date: 2022-01-14
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the application provides an application of modified steel slag in the treatment of printing and dyeing wastewater by activating persulfate. The modified steel slag can be used as an activator for persulfate degradation treatment of printing and dyeing wastewater, effectively solving the problems of printing and dyeing wastewater treatment and Waste of steel slag resources

Method used

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  • Application of modified steel slag in treating printing and dyeing wastewater by activating persulfate
  • Application of modified steel slag in treating printing and dyeing wastewater by activating persulfate
  • Application of modified steel slag in treating printing and dyeing wastewater by activating persulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The steel slag powder with a particle size of 40 mesh was placed in a horse-boiler furnace and calcined at 500°C for 3 hours to obtain modified steel slag.

[0047] At 20°C, potassium sulfate and the obtained modified steel slag were put into the printing and dyeing wastewater containing methyl orange for shaking treatment.

[0048] Among them, the concentration of modified steel slag was 1g / L, the concentration of potassium persulfate was 1mmol / L, the oscillation speed was 100rpm, and the oscillation time was 120min.

Embodiment 2

[0050] A modified steel slag is prepared by the following method:

[0051] The steel slag powder with a particle size of 80 mesh was placed in a horse-boiler furnace and calcined at 700°C for 2 hours to obtain modified steel slag.

[0052] At 25°C, potassium sulfate and the prepared modified steel slag were added to the printing and dyeing wastewater containing methyl orange for shaking treatment.

[0053] Among them, the concentration of modified steel slag was 10g / L, the concentration of potassium persulfate was 10mmol / L, the oscillation speed was 200rpm, and the oscillation time was 180min.

Embodiment 3

[0055] A modified steel slag is prepared by the following method:

[0056] The steel slag powder with a particle size of 60 mesh was placed in a horse-boiler furnace and calcined at 800°C for 1 hour to obtain modified steel slag.

[0057] At 30°C, potassium sulfate and the prepared modified steel slag were put into the printing and dyeing wastewater containing methyl orange for shaking treatment.

[0058]Among them, the concentration of modified steel slag was 13g / L, the concentration of potassium persulfate was 15mmol / L, the oscillation speed was 300rpm, and the oscillation time was 20min.

[0059] Carry out electron microscope scanning to the steel slag powder before and after modification of embodiment 2 respectively, scanning result is respectively as follows figure 1 , figure 2 shown. Untreated steel slag particles have a relatively smooth, flat surface and small size. In contrast, the surface morphology of steel slag powder changed significantly after modification a...

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Abstract

The invention belongs to the field of printing and dyeing wastewater treatment, and particularly relates to application of modified steel slag in treating printing and dyeing wastewater by activating persulfate. The method comprises the following steps: calcining steel slag in a muffle furnace at high temperature, and naturally cooling to obtain the modified steel slag. The modified steel slag is used as a persulfate (PS) activating agent to activate persulfate (PS) to treat printing and dyeing wastewater containing methyl orange, and the removal rate of methyl orange reaches up to 97%. Meanwhile, raw materials of the modified steel slag are low in price and easy to obtain, the treatment cost of the printing and dyeing wastewater is reduced, excellent activation performance and recycling performance are shown, and the modified steel slag is a very promising persulfate activating agent.

Description

technical field [0001] The application relates to the field of printing and dyeing wastewater treatment, in particular to the application of modified steel slag in activated persulfate treatment of printing and dyeing wastewater. Background technique [0002] With the rapid development of the printing and dyeing industry, a large amount of dye wastewater is generated and discharged. According to statistics, about 100,000 commercial dyes produce 700,000 tons of various pigments every year. After the dye wastewater enters the water body, it will not only cause hypoxia in the water body, affect the growth of aquatic organisms and microorganisms, but also seriously damage the natural ecological chain of the water body. risks of. [0003] Among them, azo dyes are widely used due to their stable chemical properties and strong functionality, accounting for about 65%-70% of the total dyes commonly used in textile and papermaking. Among the azo dyes produced, methyl orange (MO) is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F101/30
CPCC02F1/722C02F1/725C02F2101/308
Inventor 苏冰琴郭越林昱廷温宇涛彭娅娅王鹏莺芮创学
Owner TAIYUAN UNIV OF TECH
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