A treatment method for synergistically oxidizing organic pollutants and hexavalent chromium using nano-carbon materials

A technology of organic pollutants and nano-carbon materials, applied in the field of environmental pollution control, can solve the problems of lack of simultaneous removal of organic pollutants and hexavalent chromium, and achieve the effects of self-cleaning, low cost and high treatment efficiency

Active Publication Date: 2021-10-01
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for synergistically oxidizing organic pollutants and hexavalent chromium by using nano-carbon materials in view of the lack of simple and rapid simultaneous removal of organic pollutants and hexavalent chromium in the prior art.

Method used

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  • A treatment method for synergistically oxidizing organic pollutants and hexavalent chromium using nano-carbon materials
  • A treatment method for synergistically oxidizing organic pollutants and hexavalent chromium using nano-carbon materials
  • A treatment method for synergistically oxidizing organic pollutants and hexavalent chromium using nano-carbon materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Using various commercialized multi-walled carbon nanotubes as catalysts to treat bisphenol A and hexavalent chromium in wastewater, the specific treatment process is as follows: carbon nanotubes (catalysts) are put into a certain amount of bisphenol A and hexavalent chromium In the water, adjust the pH with sulfuric acid, stir, detect the content of bisphenol A and hexavalent chromium in the water after a certain period of time, compare with the content in the water before treatment, and calculate the removal rate of bisphenol A and hexavalent chromium. At the same time, no catalyst was used as a control.

[0025] The specific catalysts used and the degradation results are shown in Table 1, and the temperature of the test is 25°C.

[0026] In the following table, MWCNT is multi-walled carbon nanotube, NH 2 -MWCNT is an amino-functionalized multi-walled carbon nanotube, CON-MWCNT is an amide-functionalized multi-walled carbon nanotube, and OH-MWCNT is a hydroxyl-functio...

Embodiment 2

[0032] Commercialized multi-walled carbon nanotubes are used as catalysts to treat bisphenol A and hexavalent chromium in wastewater. The specific treatment process is as follows: put carbon nanotubes (catalysts) into the In the water, adjust the pH with sulfuric acid, stir, detect the content of bisphenol A and hexavalent chromium in the water after a certain period of time, compare with the content in the water before treatment, and calculate the removal rate of bisphenol A and hexavalent chromium.

[0033] The results of the influence of inorganic anions in water on the degradation of organic pollutants in water are shown in Table 2, and the temperature of the tests is 25°C.

[0034] When table 2 anion exists, the catalyst treats the result of bisphenol A and hexavalent chromium

[0035]

[0036] In treatments 6 and 7, the concentration of anions was both 500mM. It can be seen from these two treatments that MWCNT still has a good removal effect on bisphenol A and hexaval...

Embodiment 3

[0038] Using commercialized multi-walled carbon nanotubes as catalysts to treat bisphenol A and hexavalent chromium in wastewater, the specific treatment process is as follows: put carbon nanotubes (catalysts) into In the water, adjust the pH with sulfuric acid, stir, detect the content of bisphenol A and hexavalent chromium in the water after a certain period of time, compare with the content in the water before treatment, and calculate the removal rate of bisphenol A and hexavalent chromium.

[0039] See Table 3 for the effect of natural organic matter existing in water on the degradation of organic pollutants in water. The temperature of the tests is 25°C.

[0040] Table 3 When natural organic matter exists, the degradation results of catalysts for bisphenol A and hexavalent chromium

[0041]

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Abstract

The invention discloses a method for synergistically oxidizing organic pollutants and hexavalent chromium by utilizing nanometer carbon materials. The method is that under the condition that organic pollutants and hexavalent chromium exist simultaneously, nano-carbon materials are added, and the pH value is adjusted to 1-2, and the organic pollutants and hexavalent chromium undergo oxidation-reduction reactions, and are removed simultaneously after the reaction Organic pollutants and hexavalent chromium. The method of the present invention uses cheap and environmentally friendly nano-carbon materials as catalysts to trigger the synergistic oxidation and reduction of organic pollutants and hexavalent chromium in the water body, and can realize the final removal of toxic organic pollutants and highly toxic hexavalent chromium in the water body. The reaction process of the method does not require external energy input, no secondary pollution, low method cost, high treatment efficiency at normal temperature, mild reaction conditions, simple operation, low equipment requirements, economical and efficient, and the anions and The organic matter has less interference to the treatment result, can realize the self-cleaning of the water body, and has a broad market prospect.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, and relates to an advanced oxidation technology of organic matter in water, and more specifically, to a method for synergistically treating organic pollutants and hexavalent chromium in water with nano-carbon materials without additional energy. Background technique [0002] New organic pollutants (such as bisphenol A, sulfonamide antibiotics, etc.) will disrupt the balance of the water ecosystem, induce drug-resistant genes and the emergence of drug-resistant bacteria, enter the human body through the biological chain, and cause damage to multiple organs. At present, the treatment methods of organic polluted wastewater mainly include physical adsorption method, biological treatment method and advanced oxidation method. Physical adsorption can only reduce the concentration of pollutants in the water body, but cannot be completely removed, and the pollutants may re-enter th...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C02F1/72C02F1/70C02F101/22C02F101/30C02F101/34C02F101/38
CPCC02F1/70C02F1/725C02F2101/22C02F2101/30C02F2101/345C02F2101/38C02F2101/40C02F2305/08
Inventor王俊慧郁家星付琦杨煌盛欧阳钢锋
OwnerSUN YAT SEN UNIV