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Preparation of magnetic heterogeneous light Fenton catalyst and method for degrading organic pollutants

A technology of organic pollutants and catalysts, applied in the field of preparation of magnetic heterogeneous photo-Fenton catalysts and its degradation of organic pollutants, can solve the problems of not fully utilizing solar energy, etc., and achieve improved utilization, high degradation rate, and good effect Effect

Active Publication Date: 2011-07-20
苏州尼普环境科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the catalyst in the heterogeneous photo-Fenton reaction is embedded in the support, so it cannot fully utilize solar energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0030] Take 1.0g / L Rhodamine B 5ml and dilute it into 100ml of 50mg / L Rhodamine B organic solution in a 100ml volumetric flask. Add 10mL of 50mg / L rhodamine B and 5ml of 10mmol / L oxalic acid into a 50ml beaker, dilute the mixed solution to 50ml with pure water, and then accurately weigh 0.2000gNiFe 2 o 4 Add it into a beaker, place it under a 300W ultraviolet-visible lamp to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 97%.

specific Embodiment 2

[0032] Take 5ml of 1.0g / L methylene blue and dilute it into 100ml of 50mg / L methylene blue solution in a 100ml volumetric flask. Add 10ml of 50mg / L methylene blue and 5ml of 10mmol / L oxalic acid to a 50ml beaker, dilute the mixed solution to 50ml with pure water, and then accurately weigh 0.2000gNiFe 2 o 4 Add it into a beaker, place it under a 300W ultraviolet-visible lamp to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 95%.

specific Embodiment 3

[0034] Get 1.0g / L malachite green 5ml and dilute it into 100ml 50mg / L malachite green solution in a 100ml volumetric flask. Add 10ml of 50mg / L malachite green and 5ml of 10mmol / L oxalic acid to a 50ml beaker, dilute the mixed solution to 50ml with pure water, and then accurately weigh 0.2000gNiFe 2 o 4 Add it into a beaker, place it under a 300W ultraviolet-visible lamp to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 98%.

[0035] In the above three specific examples of the methods for degrading organic pollutants with magnetic heterogeneous photo-Fenton catalysts, after the degradation is completed, the catalysts can be separated under the action of an external magnetic field, and the separated catalysts can be reused repeatedly.

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Abstract

The invention provides preparation of a magnetic heterogeneous light Fenton catalyst. The preparation comprises the following steps of: preparing mixed solution by using ferric trichloride and nickel sulfate as raw materials, and performing heating, separation, washing and drying on the mixed solution to obtain the magnetic heterogeneous light Fenton catalyst NiFe2O4. The invention also provides a method for degrading organic pollutants by using the magnetic heterogeneous light Fenton catalyst. The method for degrading the organic pollutants comprises the following steps of: placing organic pollutant solution into a reaction container; adding a proper amount of oxalic acid into the reaction container; adding a proper amount of magnetic heterogeneous light Fenton catalyst into the reactioncontainer; and performing photocatalysis reaction under the irradiation of visible ultraviolet light. The magnetic heterogeneous light Fenton catalyst NiFe2O4 improves the utilization rate of sunlight; and the magnetic heterogeneous light Fenton catalyst has good effect on nickel ferrite photocatalysis of the organic pollutants and high degradation rate.

Description

technical field [0001] The invention relates to the preparation of a magnetic heterogeneous photo-Fenton catalyst and a method for applying the catalyst to degrade organic pollutants. Background technique [0002] Since H J Fenton discovered that Fe 2+ / H 2 o 2 Since organic matter can be oxidized (J Chem Soc Trans, 1894, 65:899-910), the Fenton system has been regarded as a green, efficient and cheap method for dealing with toxic organic pollutants and dyes (Acc Chem Res , 1975, 8: 125-131; Crit Rev Environ Sci Technol, 2006, 36: 1-84). However, the traditional Fenton reaction system is carried out in a homogeneous phase, and the homogeneous catalyst iron ions are easily lost with the mobile phase, so this homogeneous system cannot recycle iron ions. In order to solve the problem of iron ion loss, people have fixed iron ions on the carrier to prepare heterogeneous Fenton catalysts, such as fixing iron ions to activated carbon (Environ.Sci.Technol., 2009, 43:1493-1499), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755A62D3/10
Inventor 刘守清
Owner 苏州尼普环境科技有限公司
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