Steel slag/nitrogen-doped activated carbon composite material, and preparation method and application thereof

A composite material and activated carbon technology, which is applied in catalyst activation/preparation, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of difficult catalyst recovery, large amount of sludge, narrow pH operation window, etc., and achieve easy surface properties, Promote degradation and improve the effect of interaction

Active Publication Date: 2019-11-19
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional Fenton process has disadvantages such as a narrow pH (~3) operating window, difficult recovery of catalysts, and a large amount of sludge.

Method used

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  • Steel slag/nitrogen-doped activated carbon composite material, and preparation method and application thereof
  • Steel slag/nitrogen-doped activated carbon composite material, and preparation method and application thereof
  • Steel slag/nitrogen-doped activated carbon composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of steel slag / nitrogen-doped activated carbon composite material, the composite material in the present embodiment is made through the following steps:

[0029] S1: Immerse commercial powdered coal-based activated carbon in a nitric acid solution with a concentration of 1mol / L, and stir at a constant temperature of 60°C for 3 hours; then filter with suction, wash the filter residue with deionized water until it is neutral, and then put the filter residue into an oven Dry at a temperature of 50°C to obtain oxidized activated carbon.

[0030] S2: According to the mass ratio of oxidized activated carbon to nitrogen-containing compound is 1:0, 5:1, 10:1, 15:1 and 20:1, immerse oxidized activated carbon in the corresponding melamine solution and ultrasonically disperse at a frequency of 30KHz for 6h , followed by suction filtration, and the filter residue was dried in an oven at a temperature of 60°C to obtain five nitrogen-doped activated carbon precursors.

[0031]...

Embodiment 2

[0035] A kind of steel slag / nitrogen-doped activated carbon composite material, the composite material in the present embodiment is made through the following steps:

[0036] S1: Immerse commercial powdered wood-based activated carbon in a nitric acid solution with a concentration of 1mol / L, and stir at a constant temperature of 60°C for 3 hours; then filter with suction, and wash the filter residue with deionized water until neutral, then put the filter residue in an oven for use Dry at a temperature of 50°C to obtain oxidized activated carbon.

[0037] S2: According to the mass ratio of oxidized activated carbon to nitrogen-containing compound of 10:1, immerse oxidized activated carbon in the corresponding dipolycyanamide solution and ultrasonically disperse at a frequency of 30kHz for 6h, then suction filter, and put the filter residue in an oven for use Dry at a temperature of 60°C to obtain a nitrogen-doped activated carbon precursor.

[0038] S3: The nitrogen-doped activa...

Embodiment 3

[0042] A kind of steel slag / nitrogen-doped activated carbon composite material, the composite material in the present embodiment is made through the following steps:

[0043] S1: Immerse commercial powdered coconut shell-based activated carbon in a nitric acid solution with a concentration of 1mol / L, and stir at a constant temperature of 60°C for 3 hours; then filter with suction, wash the filter residue with deionized water until it is neutral, and then put the filter residue in an oven Dry at a temperature of 50°C to obtain oxidized activated carbon.

[0044] S2: According to the mass ratio of oxidized activated carbon to nitrogen-containing compound is 5:1, immerse oxidized activated carbon in the corresponding urea solution and ultrasonically disperse at a frequency of 30kHz for 6h, then suction filter, and put the filter residue in an oven with a temperature of 60°C. Dry at high temperature to obtain nitrogen-doped activated carbon precursor.

[0045] S3: The nitrogen-do...

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Abstract

The invention discloses a steel slag/nitrogen-doped activated carbon composite material, and a preparation method and application thereof. The preparation method for the composite material comprises the following steps: pre-oxidizing activated carbon; then putting the pre-oxidized activated carbon into a nitrogen-containing compound solution for ultrasonic treatment, and then carrying out suctionfiltration and drying so as to obtain a nitrogen-doped activated carbon precursor; then calcining the nitrogen-doped activated carbon precursor under a nitrogen atmosphere to obtain nitrogen-doped activated carbon; and finally, mixing steel slag, a metal additive and the nitrogen-doped activated carbon, and carrying out calcining in a nitrogen atmosphere to obtain the steel slag/nitrogen-doped activated carbon composite material. The composite material prepared by the invention retains the rich pore structure of the activated carbon, introduces nitrogen-containing functional groups, contains various active metals in the steel slag, and is a highly efficient catalytic material for catalytic oxidation and removal of organic pollutants in water bodies.

Description

technical field [0001] The invention relates to an organic wastewater treatment material, in particular to a steel slag / nitrogen-doped activated carbon composite material and its preparation method and application. Background technique [0002] Steel slag is the main solid waste unavoidably produced in the iron and steelmaking process in the iron and steel industry, and its output accounts for about 8% to 15% of the crude steel output. It is estimated that the output of steel slag in my country in 2016 is about 81 to 120 million tons, and the cumulative storage of steel slag in the country is nearly 1 billion tons. However, the comprehensive utilization rate of steel slag in my country is less than 40%, which is far from the comprehensive utilization rate of steel slag in some developed countries which is over 95%. A large amount of steel slag piled up not only seriously occupies limited land resources, but also pollutes the atmosphere, soil, surface water and groundwater; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10B01J37/08B01J37/12B01J37/34C02F1/72C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J35/1004B01J37/343B01J37/082B01J37/12C02F1/725C02F1/722C02F2101/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40
Inventor 邢波董静文杨郭刘兴勇叶宇玲莫莎宋翔罗文杨波王皓
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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