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Method for preparing heterogeneous-phase Fenton catalyst and application thereof

A heterogeneous, catalyst technology, applied in the fields of comprehensive utilization of waste and water treatment, can solve problems such as environmental hazards and heavy metal pollution, and achieve the effects of low cost, stable catalytic activity, good economic and environmental benefits

Active Publication Date: 2016-11-09
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the other hand, both the traditional Fenton oxidation process and the industrial application process of iron-carbon micro-electrolysis will produce a large amount of sludge with high Fe content, referred to as iron sludge, which will cause heavy metal pollution and cause serious harm to the environment if not handled properly

Method used

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  • Method for preparing heterogeneous-phase Fenton catalyst and application thereof
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  • Method for preparing heterogeneous-phase Fenton catalyst and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The iron slime and biogas residue are cleaned separately, dried at 80°C, crushed, and then sieved to obtain iron slime and biogas residue particles smaller than 200 meshes. The iron slime and biogas residue particles are mixed and mixed, and the iron slime and biogas residue The mass ratio is iron mud: biogas residue = 2:5, and then the activator ZnCl with a concentration of 3 mol / L 2 The solution is impregnated, and the impregnation ratio is ZnCl 2 Solution: Mixed sample = 3L: 100g, the immersion time is 2 hours, the stirrer is mixed at 100 rpm, and the solid sediment sample is collected after standing for 1 hour, and then the solid sediment sample is activated in a muffle furnace at high temperature , the muffle furnace pyrolysis temperature is 800 °C, the heating rate is 15 °C / min, and after reaching the required temperature, it is kept for 2 hours, nitrogen is used to isolate oxygen protection, the flow rate is 200 mL / min, and the concentration of the sample obtaine...

Embodiment 2

[0043] The iron slime and biogas residue are cleaned separately, dried at 80°C, crushed, and sieved to obtain iron slime and biogas residue particles smaller than 200 meshes, and the iron slime and biogas residue particles are mixed, and the iron slime and biogas residue particles are mixed. The mass ratio is iron mud: biogas residue = 1:5, and then the activator ZnCl with a concentration of 3 mol / L 2 The solution is impregnated, and the impregnation ratio is ZnCl 2 Solution: Mixed sample = 3L: 100g, the immersion time is 3 hours, the stirrer is mixed at 100 rpm, and the solid sediment sample is collected after standing for 1 hour, and then the solid sediment sample is activated at high temperature in the muffle furnace , the muffle furnace pyrolysis temperature is 800 °C, the heating rate is 15-20 °C / min, and after reaching the required temperature, keep it for 2 hours, nitrogen is used to isolate oxygen protection, the flow rate is 200 mL / min, and the concentration of the sa...

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Abstract

The invention discloses a method for preparing a heterogeneous-phase Fenton catalyst and an application thereof, which belong to the fields of waste comprehensive utilization and water treatment. The method comprises the following steps: cleaning waste iron filings and biogas residue, drying the materials, crushing the materials, doping and dipping the materials, activating the materials at high temperature, pickling a sample and screening the sample to obtain the heterogeneous-phase Fenton catalyst. The method of the catalyst has the advantages of simple and easy operation, and saved preparation cost, effectively solves the resource utilization problem of waste iron filings and biogas residue, which belongs to the preparation technology of the sustainable development catalyst. The catalyst is used for processing difficultly-degraded waste water while being used for catalysis of Fenton, the pH value is not required to be adjusted, the pollutant removal effect is good, secondary pollution of iron filings and metal ions cannot be generated, the catalyst activity is not obviously changed through continuous operation with more than 600 hours, the catalyst has stable catalysis performance and good application performance, and is suitable for industrial popularization and application.

Description

technical field [0001] The invention relates to a method for preparing a heterogeneous Fenton catalyst from waste iron sludge and biogas residue, which is applied to catalytic Fenton oxidation advanced treatment of refractory waste water, and belongs to the fields of waste comprehensive utilization and water treatment. Background technique [0002] Fenton oxidation can effectively remove refractory organic matter in wastewater, and is widely used in deep wastewater treatment processes. However, the pH value of the traditional Fenton process is narrow, and the consumption of reagents used to adjust the pH is relatively large, resulting in high operating costs. At the same time, the dissolution of iron ions during the reaction process will increase the chroma of wastewater and produce a large amount of iron sludge precipitation, causing environmental damage. Secondary pollution. The heterogeneous Fenton oxidation process is to fix the catalytically active Fe on the carrier, s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/30
CPCB01J23/745C02F1/725C02F2101/30C02F2305/026
Inventor 庄海峰方程冉汪华单胜道宋亚丽袁小利
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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