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Renewable modified activated carbon adsorbent and preparation method and application thereof

An activated carbon adsorption and activated carbon technology, which is applied in the field of regenerable modified activated carbon adsorbent and its preparation, can solve the problems of low adsorption efficiency, large-scale practical application limitations, and high processing costs, and achieve low cost and simple production process The effect of high control and high product error rate

Inactive Publication Date: 2020-05-05
ZHENJIANG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For a long time, reducing and purifying the discharge of various pollutants in air and water has effectively achieved environmental protection. Among them, physical adsorption is considered to be the most effective method for solving air pollution and industrial wastewater treatment on a large scale, but the adsorption of adsorbents in the water phase Poor separation and reproducibility limit its application in water treatment or air purification process
In addition, the photocatalytic technology that has emerged in recent years is applied to the treatment of industrial wastewater and has broad application prospects. However, its high treatment cost and its inability to apply to a wide range of practical applications limit its application in the field of wastewater treatment.
The existing activated carbon has low adsorption efficiency for heavy metal ions in industrial wastewater, which limits its application in the field of wastewater treatment

Method used

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  • Renewable modified activated carbon adsorbent and preparation method and application thereof
  • Renewable modified activated carbon adsorbent and preparation method and application thereof
  • Renewable modified activated carbon adsorbent and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of a Renewable Modified Activated Carbon Adsorbent

[0030] (1) Modification of carbon nanotubes

[0031] Add 0.3g of multi-walled carbon nanotubes (with an inner diameter of 5-10nm, an outer diameter of 10-20nm, and a length of 0.5-2μm) into 30mL of HNO3 (69%) solution, ultrasonically transfer to a 50mL stainless steel reaction kettle after 0.5h, Incubate at 100°C for 1h. After naturally cooling to room temperature, the product was repeatedly washed with deionized water and ethanol until clean, and dried in vacuum to obtain modified carbon nanotubes.

[0032] (2) Preparation of molybdenum disulfide / carbon nanotube composites

[0033] Disperse 20 mg of the modified carbon nanotubes obtained in (1) into 30 mL of deionized water to form a suspension, then add 0.8 g of ammonium molybdate tetrahydrate, 3.6 g of thiourea, and 2.2 g of polyvinylpyrrolidone to the suspension After magnetically stirring for 30 minutes, it was transferred to a 50mL stainless steel...

Embodiment 2

[0037] Preparation of a Renewable Modified Activated Carbon Adsorbent

[0038] (1) Modification of carbon nanotubes

[0039] Add 0.3g of multi-walled carbon nanotubes (with an inner diameter of 5-10nm, an outer diameter of 10-20nm, and a length of 0.5-2μm) into 30mL of HNO3 (69%) solution, ultrasonically transfer to a 50mL stainless steel reaction kettle after 0.5h, Incubate at 100°C for 1h. After naturally cooling to room temperature, the product was repeatedly washed with deionized water and ethanol until clean, and dried in vacuum to obtain modified carbon nanotubes.

[0040] (2) Preparation of molybdenum disulfide / carbon nanotube composites

[0041] Disperse 20 mg of the modified carbon nanotubes obtained in (1) into 30 mL of deionized water to form a suspension, then add 0.4 g of ammonium molybdate tetrahydrate, 1.8 g of thiourea, and 1.1 g of polyvinylpyrrolidone to the suspension After magnetically stirring for 30 minutes, it was transferred to a 50mL stainless steel...

Embodiment 3

[0045] Preparation of a Renewable Modified Activated Carbon Adsorbent

[0046] (1) Modification of carbon nanotubes

[0047] Add 0.3g of multi-walled carbon nanotubes (with an inner diameter of 5-10nm, an outer diameter of 10-20nm, and a length of 0.5-2μm) into 30mL of HNO3 (69%) solution, ultrasonically transfer to a 50mL stainless steel reaction kettle after 0.5h, Incubate at 100°C for 1h. After naturally cooling to room temperature, the product was repeatedly washed with deionized water and ethanol until clean, and dried in vacuum to obtain modified carbon nanotubes.

[0048] (2) Preparation of molybdenum disulfide / carbon nanotube composites

[0049] Disperse 20 mg of the modified carbon nanotubes obtained in (1) into 30 mL of deionized water to form a suspension, then add 0.2 g of ammonium molybdate tetrahydrate, 0.9 g of thiourea, and 0.55 g of polyvinylpyrrolidone to the suspension After magnetically stirring for 30 minutes, it was transferred to a 50mL stainless steel ...

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Abstract

The invention discloses a renewable modified activated carbon adsorbent and a preparation method thereof. The renewable modified activated carbon adsorbent is prepared from the following components: 4-8% of a molybdenum disulfide / carbon nanotube composite material, 3-5% of magnetic nanoparticles, 5-15% of diatom ooze, 6-12% of bentonite and the balance of activated carbon. The preparation method comprises the following steps: modifying the modified carbon nanotubes, adding the modified carbon nanotubes into water to form a dispersion liquid, adding soluble molybdenum salt, thiourea and a surfactant, magnetically stirring, carrying out vacuum heat preservation at 160-190 DEG C for 18-20 hours, cooling, filtering, washing and drying to obtain a molybdenum disulfide / carbon nanotube compositematerial; uniformly mixing the composite material with the other raw materials, ball-milling, washing and drying, and then carrying out vacuum calcination at 200-250 DEG C for 1-2 h. The adsorption capacity of the renewable modified activated carbon adsorbent on heavy metal ions in industrial wastewater greatly exceeds adsorption capacity of current commercial activated carbon.

Description

technical field [0001] The invention relates to the field of nanometer materials and environment-friendly materials, in particular to a regenerable modified activated carbon adsorbent and its preparation method and application. Background technique [0002] With the rapid development of national economy and science and technology, people's material life has been greatly enriched, while environmental pollution and energy crisis have become the main hot issues in the current society. For a long time, reducing and purifying the discharge of various pollutants in air and water has effectively achieved environmental protection. Among them, physical adsorption is considered to be the most effective method for solving air pollution and industrial wastewater treatment on a large scale, but the adsorption of adsorbents in the water phase Poor separability and reproducibility limit its application in water treatment or air purification process. In addition, the photocatalytic technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J20/34C02F1/28C02F101/20C02F101/34C02F101/36C02F101/38
CPCB01J20/20C02F1/283B01J20/3416C02F2101/20C02F2101/38C02F2101/36C02F2101/40C02F2101/34
Inventor 唐国钢徐晶张飞霞
Owner ZHENJIANG COLLEGE
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