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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: 2019-10-15
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

[0019] A method for preparing a metal-doped manganese dioxide photocatalyst for coking wastewater treatment, comprising the following steps:

[0020] Step 1: Weigh 1.102g of potassium permanganate in a 100mL beaker;

[0021] Step 2: Add 36mL of deionized water and 36mL of ethanol into the beaker, and stir well to obtain a purple-red solution;

[0022] Step 3: Add 2.47g of urea and 0.1g of bismuth oxide to the purple-red solution in Step 2 to obtain a mixture. After ultrasonication for 10 minutes, transfer it to a 100mL hydrothermal reaction kettle and keep it warm at 70°C for 10 hours. After the end, the mixture was naturally cooled to room temperature;

[0023] Step 4: fully wash the precipitate in the mixture with deionized water, and centrifuge in a differential centrifuge for 10 minutes, and take the supernatant to measure the pH of the mixture;

[0024] Step 5: Repeat the process of step 4 until the pH is neutral, then dry the obtained product in an oven for 12 hours, a...

Embodiment 2

[0028] A method for preparing a metal-doped manganese dioxide photocatalyst for coking wastewater treatment, comprising the following steps:

[0029] Step 1: Weigh 1.102g of potassium permanganate in a 100mL beaker;

[0030] Step 2: Add 36mL of deionized water and 36mL of ethanol into the beaker, and stir well to obtain a purple-red solution;

[0031] Step 3: Add 2.47g of urea and 0.1g of iron oxide to the purple-red solution in Step 2 to obtain a mixture. After ultrasonication for 10 minutes, transfer it to a 100mL hydrothermal reactor, keep it warm at 70°C for 10 hours, and wait for the reaction After the end, the mixture was naturally cooled to room temperature;

[0032] Step 4: fully wash the precipitate in the mixture with deionized water, and centrifuge in a differential centrifuge for 10 minutes, and take the supernatant to measure the pH of the mixture;

[0033] Step 5: Repeat the process of step 4 until the pH is neutral, then dry the obtained product in an oven for...

Embodiment 3

[0037] A method for preparing a metal-doped manganese dioxide photocatalyst for coking wastewater treatment, comprising the following steps:

[0038] Step 1: Weigh 1.102g of potassium permanganate in a 100mL beaker;

[0039] Step 2: Add 36mL of deionized water and 36mL of ethanol into the beaker, and stir well to obtain a purple-red solution;

[0040] Step 3: Add 2.47g of urea and 0.1g of tin oxide to the purple-red solution in Step 2 to obtain a mixture, and transfer it to a 100mL hydrothermal reaction kettle after ultrasonication for 10min, and keep it warm at 70°C for 10h. After the end, the mixture was naturally cooled to room temperature;

[0041] Step 4: fully wash the precipitate in the mixture with deionized water, and centrifuge in a differential centrifuge for 10 minutes, and take the supernatant to measure the pH of the mixture;

[0042] Step 5: Repeat the process of step 4 until the pH is neutral, then dry the obtained product in an oven for 12 hours, and control...

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Abstract

The invention discloses a preparation method of a metal-doped manganese dioxide photocatalyst for coking wastewater treatment. The method comprises the following steps: weighing 1.100-1.104 g of potassium permanganate, and adding the potassium permanganate into a 100 mL beaker; and adding 35-37mL of deionized water and 35-37 mL of ethanol into the beaker, and performing sufficient stirring to obtain a purple-red solution. A metal oxide and manganese dioxide are compounded, the metal oxide has a photocatalytic property, and the manganese dioxide has a good photocatalytic property, a large specific surface area and strong adsorption capacity, so the metal oxide composite manganese dioxide has an improved photocatalytic performance, can significantly improve the separation of photogenerated electrons and holes and greatly improve the photocatalytic activity of a catalyst, and can easily convert light energy into energy required by a chemical reaction in order to achieve the catalysis effect, thereby surrounding oxygen and water molecules can be excited to form free negative ions with an oxidizing power, and the ability of the catalyst to treat phenol in the coking wastewater is improved.

Description

technical field [0001] The invention relates to the technical field of photocatalyst production, in particular to a method for preparing a metal-doped manganese dioxide photocatalyst for coking wastewater treatment. Background technique [0002] Coking wastewater is a high-concentration, non-ideal system, heterogeneous phase containing volatile phenols, polycyclic aromatic hydrocarbons, and heterocyclic compounds such as oxygen, sulfur, and nitrogen produced in the process of coal-to-coke, gas purification, and coking product recovery. The refractory organic industrial wastewater has a BOD5 / COD value of 0.28-0.32, which has poor biodegradability and is difficult to biodegrade. Coking wastewater has a wide variety of pollutants, complex components, and contains a large number of refractory substances. The pollutants contained in it are mainly divided into inorganic pollutants and organic pollutants. There are many kinds of organic pollutants. The main forms are phenol, p-cres...

Claims

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Application Information

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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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