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Preparation method for modified activated carbon used for catalysis of hydrogen peroxide oxidation

A hydrogen peroxide and activated carbon technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of non-reusability, difficult separation of catalysts, etc. Separation and recycling, improving catalytic performance, enhancing loading capacity and uniformity

Inactive Publication Date: 2015-12-02
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention mainly aims at the problem that the catalyst is difficult to separate and cannot be reused when using a homogeneous system to treat organic wastewater, and provides a method for preparing modified activated carbon for catalyzing the oxidation of hydrogen peroxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] In this example, coal-based activated carbon was selected, washed and dried, placed in a 500mL 170-270mT alternating magnetic reactor, added 300mL of pure water, and cleaned twice at a frequency of 50Hz, and the water was discarded respectively; In the alternating magnetic reactor, add 300mL0.2mol / L ferrous sulfate solution to the activated carbon, react for 15min under the condition of maintaining the frequency of 170-270mT and 50Hz in the alternating magnetic reactor, collect the activated carbon and ferrous sulfate solution respectively, The ferrous sulfate solution is used for recycling; after passing ozone into the collected activated carbon for 10 minutes, pass it into pure water to wash and dry the activated carbon to make modified activated carbon.

Embodiment 2

[0016] In this example, coal-based activated carbon was selected, washed and dried, placed in a 500mL 170-270mT alternating magnetic reactor, added 300mL of pure water, and cleaned twice at a frequency of 50Hz, and the water was discarded respectively; In the alternating magnetic reactor, add 300mL0.5mol / L ferrous chloride solution to the activated carbon, react for 30min under the conditions of maintaining the frequency of 170-270mT and 50Hz in the alternating magnetic reactor, and collect the activated carbon and ferrous chloride respectively solution, the ferrous chloride solution is used for recycling; after passing ozone into the collected activated carbon for 15 minutes, pass it into pure water to wash and dry the activated carbon to make modified activated carbon.

Embodiment 3

[0018] The catalytic reactor constructed with the above-mentioned modified activated carbon has the effect of treating raw water polluted by DDTV (dichlorvos) as the main organic pesticide.

[0019] The above-mentioned modified activated carbon is used to make a catalytic reaction column. The hydrogen peroxide is mixed with the raw water from the lower part of the activated carbon catalyst column. The value of the TOC. The content of DDTV in the raw water is 3.8mg / L, the dosage of hydrogen peroxide is 3.0mg / L, and the effective residence time in the reaction column is 10min. It is measured that the degradation rate of DDTV reaches 97.8%-99.5%, while the degradation rate of hydrogen peroxide or ozone alone (without adding catalyst) under the same conditions is only 56.9 or 47.6%. And the mineralization ability of catalyzing hydrogen peroxide oxidation is significantly improved, reaching 51.8%-59.2%.

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Abstract

The invention relates to a preparation method for modified activated carbon used for catalysis of hydrogen peroxide oxidation. The preparation method mainly solves the problem that catalysts are difficult to separate and cannot be utilized repeatedly when a homogeneous system is employed to process organic waste water. The preparation method comprises the following steps: firstly, powder particles and impurities on surfaces of activated carbon are washed in water, and the activated carbon is dried for standby; secondly, an alternate magnetic reactor is employed to clean the activated carbon again; thirdly, the activated carbon after cleaning is taken, a certain amount of errous sulphate solution or ferrous chloride solution is added according to a proportion that 100g of the activated carbon is added with 200-300mL of a ferrous sulphate solution or a ferrous chloride solution with a concentration of 0.1-0.5mol / L, the reaction is carried out for 10-30min, and activated carbon and the ferrous sulphate solution are collected respectively; fourthly, ozone is pumped into the collected activated carbon for 5-15min, then pure water is added to clean the activated carbon, then the activated carbon is dried, and modified activated carbon is prepared. The provided activated carbon has advantages of high stability, low cost, stable performances and the like.

Description

technical field [0001] The invention relates to a method for preparing modified activated carbon for catalyzing the oxidation of hydrogen peroxide, and specifically belongs to a method for preparing modified activated carbon with an iron-containing solution and stably loading it on activated carbon to form a modified activated carbon with excellent catalytic oxidation performance . Background technique [0002] The effective control of organic pollutants is the main problem faced by wastewater treatment and water supply treatment. In particular, water sources are inevitably polluted to a certain extent, and some synthetic organic compounds are more difficult to be removed by conventional treatment processes due to their stable chemical structures. The toxic organic pollutants in sewage and wastewater are highly toxic and difficult to treat due to the stability of their chemical structure. It is difficult to achieve a satisfactory treatment effect by applying conventional t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F1/78C02F101/30
Inventor 刘海龙
Owner SHANXI UNIV
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