Preparation method of iron-manganese bimetal composite catalyst and application thereof in the purification of industrial waste water

A composite catalyst, industrial wastewater technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as incomplete removal of organic matter, and achieve strong catalytic ozone. The ability to decompose to generate OH, low energy consumption, and the effect of improving purification efficiency

Inactive Publication Date: 2019-11-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, in view of the problem of incomplete removal of organic matter in industrial wastewater, as well as the improvement of current industrial wastewater discharge requirements and the defects of advanced treatment technology, the present invention provides a preparation method of an iron-manganese bimetallic composite catalyst and its application in the purification of industrial wastewater The application in wastewater can effectively remove organic matter in wastewater, speed up the reaction rate, and improve the speed of purification. At the same time, more adsorption sites for organic matter can improve the efficiency of catalysis, improve the utilization rate of ozone, and speed up the oxidation process.

Method used

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  • Preparation method of iron-manganese bimetal composite catalyst and application thereof in the purification of industrial waste water
  • Preparation method of iron-manganese bimetal composite catalyst and application thereof in the purification of industrial waste water
  • Preparation method of iron-manganese bimetal composite catalyst and application thereof in the purification of industrial waste water

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Embodiment 1

[0035] A preparation method for an iron-manganese bimetallic composite catalyst, comprising the following steps:

[0036] (1) Soak activated carbon with a particle size of 2 mm in nitric acid solution with a volume concentration of 8% for 4 hours, take out the modified activated carbon, and wash it repeatedly with distilled water until the pH does not change, then place it in an oven to dry to obtain the modification Activated carbon;

[0037] (2) Fe(NO 3 ) 3 9H 2 O was added to 45% Mn(NO 3 ) 2 A mixed solution is made in the solution, so that Fe(NO 3 ) 3 9H 2 O: Mn(NO 3 ) 2 The molar ratio is 1:1.8, the modified activated carbon is added to the mixed solution, and the temperature is 30 °C in a water bath for 8 hours to complete the modification of the modified activated carbon on Fe(NO 3 ) 3 , Mn(NO 3 ) 2 adsorption;

[0038] (3) will adsorb Fe(NO 3 ) 3 , Mn(NO 3 ) 2 The modified activated carbon was taken out from the solution, after cleaning and drying, it...

Embodiment 2

[0042] The operating steps in the present embodiment are the same as in Example 1, the difference is that Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 Replaced by adding only Fe(NO 3 ) 3 9H 2 O or just add Mn(NO 3 ) 2 .

[0043] Will Figure 5 A transmission electron microscope image of a single-component manganese oxide supported on activated carbon, Figure 6 Transmission electron microscope images of single-component iron oxides supported on activated carbon, comparing figure 2 , Figure 5 , Figure 6 , it can be seen that the single-component manganese oxide particles agglomerate very seriously, resulting in insufficient dispersion of active components on the activated carbon; although the single-component iron oxide particles are dispersed relatively widely, its loading capacity is very small and the loading rate is very low . The iron-manganese bimetallic catalyst has a large particle dispersion and a high loading rate. Fe(NO 3 ) 3 9H 2 O and Mn(NO 3 ) 2 It is...

Embodiment 3

[0045] A preparation method for an iron-manganese bimetallic composite catalyst, comprising the following steps:

[0046] (1) Soak the activated carbon with a particle size of 5 mm in a nitric acid solution with a volume concentration of 10% for 6 hours, take out the modified activated carbon and wash it repeatedly with distilled water until the pH does not change, then place it in an oven to dry to obtain the modification Activated carbon;

[0047] (2) Fe(NO 3 ) 3 9H 2 O was added to 50% Mn(NO 3 ) 2 A mixed solution is made in the solution, so that Fe(NO 3 ) 3 9H 2 O: Mn(NO 3 ) 2 The molar ratio is 1:2.5, the modified activated carbon is added to the mixed solution, and the temperature is 45 °C in a water bath for 9 hours to complete the modification of Fe(NO 3 ) 3 , Mn(NO 3 ) 2 adsorption;

[0048] (3) will adsorb Fe(NO 3 ) 3 , Mn(NO 3 ) 2 The modified activated carbon was taken out from the solution, after cleaning and drying, it was calcined at 400°C for ...

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Abstract

The invention provides a preparation method of an iron-manganese bimetal composite catalyst and an application thereof in the purification of industrial waste water, which relates to the technical field of catalysts. The preparation method comprises the following steps: (1) soaking the activated carbon in nitric acid solution for 4-6 hours later, taking out the activated carbon, washing and dryingto obtain the modified activated carbon; (2) adding Fe(NO3)3.9H2O to Mn(NO3)2 solution with the weight concentration of 45-50% to prepare the mixed solution, adding the modified activated carbon intothe mixed solution, water bathing for 8-9 hours, absorbing Fe(NO3) 3 and Mn(NO3)2 by modified activated carbon; (3) taking out the modified activated carbon adsorbed with Fe(NO3) 3 and Mn(NO3)2 fromthe solution, cleaning, drying, calcining in nitrogen atmosphere, and cooling to obtain the iron-manganese bimetal composite catalyst. The catalyst of the invention can effectively remove the organicmatter in the waste water, accelerate the reaction rate, and improve the purification speed; meanwhile, more adsorption sites of the organic matter can improve the catalytic efficiency, improve the utilization rate of ozone, and speed up the oxidation process.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of an iron-manganese bimetallic composite catalyst and its application in industrial wastewater purification. Background technique [0002] The rapid development of industry has caused a large increase in the discharge of wastewater. Among them, the amount of wastewater discharged by chemical, pharmaceutical, textile, printing and dyeing industries is large, and the water contains a large amount of toxic and harmful substances, such as phenolic compounds and polycyclic aromatic hydrocarbons. compounds, heterocyclic compounds, etc. Most of these substances are refractory and have triple effects. If discharged without treatment, they will continue to accumulate, enrich, and eventually enter animals or humans through the food chain, posing a threat to human life and health. The existing industrial wastewater treatment methods include physical methods, biologi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/889B01J35/10C02F1/72C02F1/78C02F101/30C02F101/36C02F101/38
CPCB01J23/002B01J23/8892B01J35/1004C02F1/725C02F1/78C02F2101/30C02F2101/36C02F2101/38C02F2101/40
Inventor 明银安杨彬
Owner WUHAN INSTITUTE OF TECHNOLOGY
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