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Preparation of Prussian blue photo-Fenton catalyst and method for degrading organic pollutant

A technology for organic pollutants and catalysts, which is applied in the field of preparation and immobilization of heterogeneous photo-Fenton catalysts, can solve the problems of non-fixation, waste of resources, ineffective recycling and reuse, etc., and achieves the effect of simple and easy method.

Inactive Publication Date: 2013-03-13
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Prussian blue colloid is easy to lose, cannot be fixed, and cannot be effectively recycled and reused, which causes a waste of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Grind the construction waste red brick fragments to a certain particle size, soak them in 1×10 -2 M of K 3 Fe(CN) 6 in the solution for 10min, take it out and rinse with water slightly, then soak in 1×10 -2 M's (NH 4 ) 2 Fe(SO 4 ) 2 In the solution for 10 minutes, take it out and rinse with water slightly. After repeating this cycle for more than 5 times, the immobilized Prussian blue light Fenton catalyst was obtained.

Embodiment 2

[0022] Soak kaolin in 1×10 -2 M of K 4 Fe(CN) 6 in the solution for 10min, take it out and rinse with water slightly, then soak in 1×10 -2 Fe(NO 3 ) 3 In the solution for 10 minutes, take it out and rinse with water slightly. After repeating this cycle for more than 5 times, the immobilized Prussian blue light Fenton catalyst was obtained.

Embodiment 3

[0024] Soak 4A type molecular sieve in 1×10 -2 M of K 3 Fe(CN) 6 in the solution for 10min, take it out and rinse with water slightly, then soak in 1×10 -2 M's (NH 4 ) 2 Fe(SO 4 ) 2 In the solution for 10 minutes, take it out and rinse with water slightly. After repeating this cycle for more than 5 times, the immobilized Prussian blue light Fenton catalyst was obtained.

[0025] The specific embodiment of Prussian blue light Fenton catalyst degradation organic pollutant method is as follows:

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PUM

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Abstract

The invention provides preparation of a Prussian blue photo-Fenton catalyst; ferric trichloride, ferric nitrate, ferric sulfate or ammonium ferrous sulfate, potassium ferricyanide, and potassium ferrocyanide are used as raw materials, and are dissolved in ultrapure water respectively to prepare a solution containing iron ions and ferricyanide ions; molecular sieve, kaolin or construction waste are used as carriers, and Prussian blue is fixed on the carriers to obtain fixed Prussian blue photo-Fenton catalyst. The invention also provides a method for degrading organic pollutants by the Prussian blue photo-Fenton catalyst, which comprises mixing of the prepared photo-Fenton catalyst with hydrogen peroxide under a light condition to degrade organic simulated pollutants. The method of the invention is simple and practical; the catalyst is suitable for recycle, can both effectively remove chroma of polluted water, and reduce COD of the polluted water.

Description

technical field [0001] The invention relates to the preparation and immobilization of a heterogeneous photo-Fenton catalyst, in particular to the immobilization of Prussian blue and its method for degrading organic pollutants by visible-light photo-Fenton. Background technique [0002] Fenton (Fenton reagent) is a mixture of hydrogen peroxide and ferrous ions. The hydroxyl radicals generated by the mixture have strong oxidizing properties. Therefore, this reagent can be used for the degradation of organic pollutants. However, the homogeneous catalyst Fe(II) can only have high catalytic activity between pH 2.5-3.5, is easy to lose, and is prone to hydrolysis under neutral conditions, loses catalytic activity, and cannot be reused. In order to solve these problems, people have prepared heterogeneous Fenton catalysts by immobilizing iron ions on supports, such as immobilizing iron ions on activated carbon, molecular sieves, mesoporous silica, ceramics, and carbon nanotubes. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J29/76C02F1/72C02F1/30C02F101/38
Inventor 刘守清程实
Owner SUZHOU UNIV OF SCI & TECH
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