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Preparation method of metal-doped manganese dioxide photocatalyst for coking wastewater treatment

A manganese dioxide light and metal doping technology, which is applied in metal/metal oxide/metal hydroxide catalysts, special compound water treatment, physical/chemical process catalysts, etc., can solve the problem of inhibiting microbial growth and metabolic activities, biochemical Performance degradation, health hazards and other problems, to achieve the effect of improving photocatalytic activity, improving the ability of phenol, and accelerating the reaction

Active Publication Date: 2022-06-07
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The organic pollutants contained in coking wastewater severely inhibit the growth of microorganisms and normal metabolic activities, resulting in a decline in its biochemical properties, making it very difficult to treat; at the same time, it contains a large number of carcinogens, polycyclic aromatic molecules, which not only cause serious pollution to water bodies , and cause great harm to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation method of metal-doped manganese dioxide photocatalyst for coking wastewater treatment, including the following steps:

[0019] Step 1: Weigh 1.102 g of potassium permanganate in a 100 mL beaker;

[0020] Step 2: Add 36 mL of deionized water and 36 mL of ethanol to the beaker, stir well to get the purple-red solution;

[0021] Step 3: Add 2.47g of urea and 0.1g of bismuth oxide to the purple-red solution of step two to give the mixture, transfer it to a 100mL hydrothermal reactor after sonication for 10min, incubate at 70 °C, keep warm for 10h, and cool the mixture naturally to room temperature after the reaction is over;

[0022] Step 4: Thoroughly wash the pellet in the mixture with deionized water and centrifuge in a differential centrifuge for 10 min, take the supernatant to determine the pH of the mixture;

[0023] Step 5: Repeat the process of step 4 until the pH is neutral, and then dry the resulting product in the oven for 12 h, and the temperature inside...

Embodiment 2

[0027] Preparation method of metal-doped manganese dioxide photocatalyst for coking wastewater treatment, including the following steps:

[0028] Step 1: Weigh 1.102 g of potassium permanganate in a 100 mL beaker;

[0029] Step 2: Add 36 mL of deionized water and 36 mL of ethanol to the beaker, stir well to get the purple-red solution;

[0030] Step 3: Add 2.47g of urea and 0.1g of iron oxide to the purple-red solution of step two, give the mixture, transfer it to a 100mL hydrothermal reactor after sonication for 10min, incubate at 70 °C, keep warm for 10h, and cool the mixture naturally to room temperature after the reaction is over;

[0031] Step 4: Thoroughly wash the pellet in the mixture with deionized water and centrifuge in a differential centrifuge for 10 min, take the supernatant to determine the pH of the mixture;

[0032] Step 5: Repeat the process of step 4 until the pH is neutral, and then dry the resulting product in the oven for 12 h, and the temperature inside the ...

Embodiment 3

[0036]Preparation method of metal-doped manganese dioxide photocatalyst for coking wastewater treatment, including the following steps:

[0037] Step 1: Weigh 1.102 g of potassium permanganate in a 100 mL beaker;

[0038] Step 2: Add 36 mL of deionized water and 36 mL of ethanol to the beaker, stir well to get the purple-red solution;

[0039] Step 3: Add 2.47 g of urea and 0.1 g of tin oxide to the purple-red solution of step two to give the mixture, transfer it to a 100 mL hydrothermal reactor after sonication for 10 min, incubate at 70 °C, keep warm for 10 h, and cool the mixture naturally to room temperature after the reaction ends;

[0040] Step 4: Thoroughly wash the pellet in the mixture with deionized water and centrifuge in a differential centrifuge for 10 min, take the supernatant to determine the pH of the mixture;

[0041] Step 5: Repeat the process of step 4 until the pH is neutral, and then dry the resulting product in the oven for 12 h, and the temperature inside th...

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PUM

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Abstract

The invention discloses a method for preparing a metal-doped manganese dioxide photocatalyst for coking wastewater treatment, comprising the following steps: weighing 1.100-1.104g potassium permanganate in a 100mL beaker; ‑37mL ethanol, obtain purple-red solution after fully stirring; The present invention utilizes metal oxide and manganese dioxide compound, firstly, metal oxide all has photocatalytic performance, secondly, manganese dioxide not only has not low photocatalytic performance, and It has a large specific surface area and strong adsorption capacity, and the metal oxide composite manganese dioxide can improve its photocatalytic performance, significantly improve the separation of photogenerated electrons and holes, greatly improve the photocatalytic activity of the catalyst, and facilitate the conversion of light energy into The energy required for chemical reactions is used to produce catalysis, which excites the surrounding oxygen and water molecules into highly oxidative free negative ions, improving its ability to treat phenol in coking wastewater.

Description

Technical field [0001] The present invention relates to the field of photocatalyst production technology, in particular to the preparation method of metal-doped manganese dioxide photocatalyst for coking wastewater treatment. Background [0002] Coking wastewater is a high concentration, non-ideal system, heterogeneous refractory organic industrial wastewater produced in the process of coal-to-coke, gas purification and coking product recovery, containing volatile phenols, polycyclic aromatic hydrocarbons and oxygen, sulfur, nitrogen and other heterocyclic compounds, and its BOD5 / COD value is generally 0.28-0.32, which is biochemically poor and difficult to biodegrade. Coking wastewater has a wide variety of pollutants, complex composition, contains a large number of refractory substances, the pollutants contained therein are mainly divided into inorganic pollutants and organic pollutants, organic pollutants are diverse, the main forms of phenol, parasol, phthalene and its allies...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/889C02F1/30C02F101/34
CPCB01J23/34B01J23/8892C02F1/30C02F2305/10C02F2101/345B01J35/39
Inventor 张敬红黄吉张月恺王淑勤付东
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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