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Mixed metal nano magnetic ozone catalyst for degrading antibiotic wastewater and application

An antibiotic waste water and mixed metal technology, applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve the problem of difficult recycling of catalysts, secondary pollution, etc.

Active Publication Date: 2021-05-18
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The homogeneous catalytic ozonation in the current catalytic ozonation technology has the limitations of difficult catalyst recycling and secondary pollution.

Method used

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  • Mixed metal nano magnetic ozone catalyst for degrading antibiotic wastewater and application
  • Mixed metal nano magnetic ozone catalyst for degrading antibiotic wastewater and application
  • Mixed metal nano magnetic ozone catalyst for degrading antibiotic wastewater and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides a kind of preparation method of mixed metal nanometer magnetic ozone catalyst NiFeMn-MMO, specifically comprises the following steps:

[0028] (1) Ferric nitrate, nickel nitrate and manganese nitrate are dissolved in ultrapure water according to the molar ratio of 5:3:2, so that the total amount of iron, nickel, and manganese ions in the water remains 1.0 mmol, and sodium nitrate is added to make the nitric acid The sodium concentration was 0.05mol / L, and then 0.98mL of 30% H 2 o 2 , and stirred evenly at room temperature, with a concentration of 400mg / L NaOH solution to adjust the pH to 7 to obtain a mixed solution;

[0029] (2) The mixed solution obtained in step (1) was transferred to a stainless steel autoclave, and kept at 120° C. for 16 hours to obtain a suspension.

[0030] (3) The suspension obtained in step (2) was washed 3 times with absolute ethanol, and centrifuged at a speed of 10000 rpm / min for 6 min to retain the precipitate;

[...

Embodiment 2

[0042] The invention provides a kind of preparation method of mixed metal nanometer magnetic ozone catalyst NiFeMn-MMO, specifically comprises the following steps:

[0043] (1) Ferric chloride, nickel chloride and manganese chloride are dissolved in ultrapure water according to the molar ratio of 11:7:5, so that the total amount of iron, nickel and manganese ions in the water remains 0.95mmol, and sodium nitrate is added to make Described sodium nitrate concentration is 0.15mol / L, then adding 1.02mL mass fraction is 30% H 2 o 2 , and stirred evenly at room temperature, with a concentration of 400mg / L NaOH solution to adjust the pH to 8 to obtain a mixed solution;

[0044] (2) The mixed solution obtained in step (1) was transferred to a stainless steel autoclave, and kept at 115° C. for 16.5 h to obtain a suspension.

[0045] (3) The suspension obtained in step (2) was washed 4 times with absolute ethanol, and centrifuged, the centrifugal speed was 6000rpm / min, and the time w...

Embodiment 3

[0053] The invention provides a kind of preparation method of mixed metal nanometer magnetic ozone catalyst NiFeMn-MMO, specifically comprises the following steps:

[0054] (1) Ferric chloride, nickel nitrate and manganese nitrate are dissolved in ultrapure water according to the molar ratio of 11:7:5, so that the total amount of iron, nickel and manganese ions in the water remains 1.05mmol, adding sodium nitrate makes the The concentration of sodium nitrate is 0.05mol / L, then add 0.98mL of 30% H 2 o 2 , and stirred evenly at room temperature, with a concentration of 400mg / L NaOH solution to adjust the pH to 9 to obtain a mixed solution;

[0055] (2) Transfer the mixed solution obtained in step (1) to a stainless steel autoclave, and keep it at 125° C. for 15.5 hours to obtain a suspension.

[0056] (3) The suspension obtained in step (2) was washed twice with absolute ethanol, and centrifuged at a speed of 6000 rpm / min for 5 min to retain the precipitate;

[0057] (4) Dry ...

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Abstract

The invention discloses a mixed metal nano magnetic ozone catalyst for degrading antibiotic wastewater and application, and belongs to the technical field of catalytic ozonization and wastewater treatment. The nano magnetic ozone catalyst is prepared by taking ferric salt, nickel salt and manganese salt as metal sources and hydrogen peroxide as an oxidizing agent through a hydrothermal synthesis method and high-temperature calcination. The catalyst is of a nanosheet laminated structure, and has the characteristics of larger specific surface area, smaller grain size and the like. The preparation process is simple, wherein the removal rate of three antibiotic pollutants and COD in a catalytic ozonation system is high, and the metal ion leaching concentration of the catalyst is low; so that the stability is high, the catalyst can be repeatedly used, the catalytic activity of the catalyst is not affected, and the catalyst has a certain application prospect.

Description

technical field [0001] The invention belongs to the technical field of catalytic ozonation and wastewater treatment, and in particular relates to a mixed metal nano-magnetic ozone catalyst capable of effectively degrading antibiotic wastewater and its application. Background technique [0002] Nowadays, people have to take medicine when they are sick, and buy medicine when they are not sick. Medicine has become an essential item for human life and travel. Although the role of drugs in restoring health is well known, a series of high-concentration antibiotic-based drug wastewater discharged by industries such as medicine has increasingly become an important source of environmental pollution. Antibiotic drugs can be roughly divided into quinolones, macrolides, β-lactams, etc., which are refractory organic substances with poor biodegradability and difficult to be treated or degraded by conventional treatment methods. Unreasonable disposal methods and antibiotics The abuse of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/00B01J35/02B01J37/10C02F1/72C02F1/78C02F101/38C02F101/34
CPCB01J23/8892B01J23/002B01J37/10C02F1/78C02F1/725B01J2523/00C02F2101/34C02F2101/38B01J35/33B01J35/40B01J2523/72B01J2523/842B01J2523/847
Inventor 戴启洲范思绮
Owner ZHEJIANG UNIV OF TECH
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