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A submicron powder material for printing and dyeing sewage treatment and its preparation method

A powder material, printing and dyeing sewage technology, applied in the direction of water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of poor selectivity, high cost, high degradation efficiency of chemical methods, etc., to achieve It is convenient for industrial production, has a wide range of applications, and has great application prospects

Active Publication Date: 2022-04-08
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the coagulation and sedimentation method is one of the more mature methods to deal with water pollution at present, but the degradation of dye wastewater is general, and secondly, finding a coagulant with better performance is the key factor determining its effectiveness; photocatalytic method is due to its low efficiency, It is still in the experimental stage and has not been widely used; the chemical method has high degradation efficiency, but its cost is high, and it is easy to generate new waste and cause secondary pollution to the water body; the biodegradation method is low in cost and high in efficiency, but it is not suitable for most toxic dyes. Difficult to biodegrade, poor selectivity, not widely used

Method used

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  • A submicron powder material for printing and dyeing sewage treatment and its preparation method
  • A submicron powder material for printing and dyeing sewage treatment and its preparation method
  • A submicron powder material for printing and dyeing sewage treatment and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] BaCO with a purity of 99.99% 3 、Nd 2 o 3 , Fe 2 o 3 and Nb 2 o 5 Raw material by stoichiometric ratio BaCO 3 :Nd 2 o 3 :Fe 2 o 3 :Nb 2 o 5 = 4:1:1:4 ingredients are put into the ball mill jar; choose zirconia balls and nylon jars; the quality of the added raw materials is 8% of the mass of the balls; the mixing ball milling time is 24 hours, and the speed is 180 rpm , the ball milling medium is absolute ethanol; the obtained product is dried in an oven at 100°C for 5 hours, and pre-sintered at 1000°C for 4 hours at a heating rate of 5°C / min; the pre-fired powder is taken out and ground, and then Use anhydrous ethanol as the ball milling medium to mix evenly for 24 hours, dry at 100°C for 5 hours, and then grind it into powder, then increase the temperature at a rate of 5°C / min to 1100°C and keep it in the air atmosphere of a high-temperature furnace for 4 hours. Sintering, and finally cooled to room temperature naturally with the furnace, the prepared sampl...

Embodiment 2

[0020] BaCO with a purity of 99.99% 3 、Nd 2 o 3 , Fe 2 o 3 and Nb 2 o 5 Raw material by stoichiometric ratio BaCO 3 :Nd 2 o 3 :Fe 2 o 3 :Nb 2 o 5 = 4:1:1:4 ingredients are put into the ball mill jar; choose zirconia balls and nylon jars; the quality of the added raw materials is 8% of the mass of the balls; the mixing ball milling time is 24 hours, and the speed is 180 rpm , the ball milling medium is absolute ethanol; the obtained product is dried in an oven at 100°C for 5 hours, and pre-sintered at 1150°C for 4 hours at a heating rate of 5°C / min; the pre-fired powder is taken out and ground, and then Use anhydrous ethanol as the ball milling medium to mix evenly for 24 hours, dry at 100°C for 5 hours, and then grind it into powder, then increase the temperature at a rate of 5°C / min to 1250°C and keep it in the air atmosphere of a high-temperature furnace for 4 hours. Sintering, and finally cool down to room temperature naturally with the furnace, the prepared sa...

Embodiment 3

[0022] BaCO with a purity of 99.99% 3 、Nd 2 o 3 , Fe 2 o 3 and Nb 2 o 5 Raw material by stoichiometric ratio BaCO 3 :Nd 2 o 3 :Fe 2 o 3 :Nb 2 o 5= 4:1:1:4 ingredients are put into the ball mill jar; choose zirconia balls and nylon jars; the quality of the added raw materials is 8% of the mass of the balls; the mixing ball milling time is 24 hours, and the speed is 180 rpm , the ball milling medium is absolute ethanol; the obtained product is dried in an oven at 100°C for 5 hours, and pre-sintered at 1200°C for 4 hours at a heating rate of 5°C / min; the pre-fired powder is taken out and ground, and then Use anhydrous ethanol as the ball milling medium to mix evenly for 24 hours, dry at 100°C for 5 hours, and then grind it into powder, then increase the temperature at a rate of 5°C / min to 1300°C and keep it in the air atmosphere of a high-temperature furnace for 4 hours. Sintering, and finally cool down to room temperature naturally with the furnace, the prepared sam...

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Abstract

The invention discloses a submicron powder material for printing and dyeing sewage treatment. Ball mill barium carbonate, neodymium trioxide, ferric oxide and niobium pentoxide to refine the raw materials, according to the nominal chemical formula Ba 4 Nd 2 Fe 2 Nb 8 o 30 (BNFN) is proportioned according to the stoichiometric ratio, after pre-calcination, secondary ball milling and other processes, using solid-state reaction and carbonate decomposition process, the final product is obtained by high-energy ball milling. 4 Nd 2 Fe 2 Nb 8 o 30 submicron powder. After 48 cycles of cooling and heating at 30-60°C, the degradation rate of the dye rhodamine B is above 95%. The method has the advantages of low production cost, simple preparation, easy industrial production, excellent degradation effect on the dye rhodamine B, and provides a new idea for sewage treatment.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a method for degrading printing and dyeing sewage by using pyroelectric submicron powder material in cold and heat cycles. Background technique [0002] In recent years, the discharge of urban domestic sewage and industrial wastewater has increased year by year, especially the rapid development of the printing and dyeing industry, and the discharged dye wastewater has caused serious pollution to water bodies. According to statistics, in industrial printing and dyeing, about 15% of dyes are discharged with wastewater, and for every ton of dye wastewater discharged, about 20 tons of water will be polluted. First of all, the chroma of dye wastewater is high, and the transparency of the water body will be reduced after pollution, causing visual pollution. Secondly, most dyes contain toxic and difficult-to-degrade organic substances, which not only have an impact on human health, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00C02F1/72C02F101/30
CPCC01G49/0054C02F1/725C01P2004/62C02F2101/308C02F2305/023
Inventor 胡长征孙朝中季瑞郭晓莹方亮
Owner GUILIN UNIVERSITY OF TECHNOLOGY