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Magnetic oxide supporting active carbon catalytic microwave degradation method of surfactant

A technology of magnetic oxides and surfactants, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Degradation, sludge activity reduction, etc.

Active Publication Date: 2011-10-26
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many problems still cannot be solved by applying these existing methods, such as the increase of foam formation, the decrease of sludge activity, and the slow biodegradation of secondary pollutants.
Photocatalysis is a popular chemical method, but it takes a long time, and the degradation is not complete, especially in the process of organic pollutant degradation may generate triple (carcinogenic, mutagenic and teratogenic) intermediate products

Method used

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  • Magnetic oxide supporting active carbon catalytic microwave degradation method of surfactant
  • Magnetic oxide supporting active carbon catalytic microwave degradation method of surfactant

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Example 1 Method for Catalyzed Microwave Degradation of Sodium Dodecylbenzene Sulfonate by Iron Oxide Loaded Activated Carbon

[0044] Preparation of iron oxide-loaded activated carbon catalyst: crush the activated carbon and sieve it through a 100-mesh sieve, weigh 10 g of activated carbon powder, put it into 300 mL of deionized water and boil for 30 min, then filter after cooling, repeat the operation three times, and dry it for later use. A certain amount of dried activated carbon powder was weighed and impregnated in 0.2 mol / L Fe(NO 3 ) 3 solution, magnetically stirred for 12.0 h, filtered off the supernatant, washed the sediment with deionized water until neutral, dried at 105°C for 6.0 h, then put it into a muffle furnace and calcined at 300°C for 3.0 h, cooled to room temperature, The iron oxide-loaded activated carbon catalyst is obtained, which is put into a desiccator for subsequent use.

[0045] Microwave degradation: Take 25.0 mL of SDBS solution with a co...

Embodiment 2

[0051] Example 2 Method for Microwave Degradation of Sodium Dodecylbenzene Sulfonate Catalyzed by Nickel Oxide Supported Activated Carbon

[0052] Preparation of nickel oxide-supported activated carbon catalyst: crush the activated carbon and sieve it through a 100-mesh sieve, weigh 10 g of activated carbon powder, put it into 300 mL of deionized water, boil for 30 min, cool and filter, repeat the operation three times, and dry it for later use. A certain amount of dried activated carbon powder was weighed and impregnated in 0.2 mol / L Ni(NO 3 ) 2 solution, magnetically stirred for 12.0 h, filtered the supernatant, washed the sediment with deionized water until neutral, put it in a constant temperature drying oven to dry for 6.0 h, then put it in a muffle furnace for calcination at 300 °C for 3.0 h, and cooled to At room temperature, the nickel oxide-supported activated carbon catalyst was obtained and put into a desiccator for subsequent use.

[0053] Microwave degradation: ...

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Abstract

The invention relates to a magnetic oxide supporting active carbon catalytic microwave degradation method of a surfactant. The technical scheme of the method comprises: (a) a magnetic oxide supporting active carbon preparation process comprising dipping active carbon into Fe (NO3)3 or Ni (NO3)2 solution, carrying out a magnetic stirring process for 10 to 13 hours, filtering and collecting precipitates, washing the precipitates to a neutral pH through deionized water, drying, calcining at a temperature of 250 to 350 DEG C for 1 to 4 hours, and cooling to obtain a magnetic oxide supporting active carbon catalyst, and (b) a microwave degradation process comprising adding the magnetic oxide supporting active carbon catalyst obtained from the process (a) into surfactant-containing solution andcarrying out an irradiation process on the mixed solution by a microwave power of 150 to 750 W for 0.5 to 3.0 minutes, wherein a weight ratio of a surfactant to the magnetic oxide supporting active carbon catalyst is 1: (4 to 24). The method provided by the invention is a novel method for processing surfactant-containing wastewater and has the advantages of high degradation efficiency, fast degradation speed, low cost, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the field of catalytic degradation, and in particular relates to a method for using magnetic oxide-loaded activated carbon as a catalyst in combination with microwaves to degrade surfactants. Background technique [0002] Surfactants are widely used in daily life (cosmetics and detergents, etc.), industry (oil extraction, metal surface cleaning and mineral flotation, etc.), agriculture (pesticide additives, etc.) and environmental protection (elution of soil pollutants, etc.) field. During production and use, wastewater containing surfactants is inevitably discharged into the environment, causing serious harm to the ecosystem. Therefore, it is quite necessary to explore new methods that can effectively degrade surfactants. [0003] The existing degradation methods are mainly physical, chemical and biological methods. However, many problems remain unsolved using these existing methods, such as increased foam formation, decrea...

Claims

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Application Information

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IPC IPC(8): C02F1/30B01J23/745B01J23/755
Inventor 张朝红王君张艳霞王冬梅张洪卫季晓彤徐瑶陈忠林
Owner LIAONING UNIVERSITY
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