Modified biochar based composite Fenton catalyst and pollution treatment method

A treatment method and biochar technology, applied in the field of organic pollution treatment, can solve the problems of human health impact, water pollution and ecological environment, etc., and achieve the effects of low price, abundant resources, and improved degradation efficiency

Inactive Publication Date: 2019-04-19
SHAOXING UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the water pollution problem caused by the massive discharge of organic pollutants such

Method used

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  • Modified biochar based composite Fenton catalyst and pollution treatment method
  • Modified biochar based composite Fenton catalyst and pollution treatment method
  • Modified biochar based composite Fenton catalyst and pollution treatment method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1-1: Preparation of composite Fenton-like catalyst

[0031] Add 200g of biochar into 1L of copper sulfate solution with a concentration of 4.8g / L (equivalent to 30mmol / L). After adsorption for 180min, the solid matter is separated by centrifugation, and then placed in a tube furnace for vacuum heat treatment at 650℃ for 1.5h. Cool to room temperature to prepare modified biochar. Weigh 100g of modified biochar, mix it with 33g of pyrite powder (the mass ratio of modified biochar to pyrite is 3:1), and grind to a particle size of less than 0.15mm to obtain a composite Fenton catalyst (catalyst 1 #).

Example Embodiment

[0032] Example 2-1: Treatment method of organic pollutants

[0033] Using phenol as a model organic pollutant, the specific effects of composite Fenton catalysts and pollution treatment methods were investigated. Add 30g of catalyst 1# prepared in Example 1-1 to 1L of phenol solution with a concentration of 300mg / L, stir and mix well, add 9mL of sodium persulfate solution with a concentration of 1mol / L (equivalent to 9mmol / L), stir Continuous reaction. When reacting for 20, 40, 80, and 120 minutes, samples were taken to determine the total organic carbon content (TOC) in the simulated wastewater. Calculate the degradation rate of phenol under different reaction times according to the TOC changes, and see the results figure 1 .

Example

[0034] Comparative Example 0-1: Using pyrite alone to catalyze the Fenton-like reaction (without adding biochar).

[0035] 7.5 g of pyrite powder with the same mass as the catalyst 1# contained in Example 2-1 was ground to a particle size of less than 0.15 mm. According to the method described in Example 2-1, pyrite was added to the phenol solution to obtain the degradation rate of phenol under different reaction times. The results are as follows figure 1 .

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Abstract

The invention discloses a modified biochar based composite Fenton catalyst and a pollution treatment method. The composite Fenton catalyst is characterized in the following steps: placed the biochar in a copper sulfate solution having a concentration of 10-50 mmol/L, stirring or oscillating the biochar and the copper sulfate solution for absorption for 180 min, carrying out centrifugation, and placing the mixture into a tubular furnace or muffle furnace, and carrying out heat treatment at 550-850 DEG C under nitrogen protection for 0.5-2 h to obtain the modified biochar; mixing the modified biochar and pyrite at a mass ratio of 1-5:1, and grinding the modified biochar and pyrite until the particle size is less than 0.15 mm to obtain the composite Fenton catalyst; and adding the composite Fenton catalyst of 10-60 g/L into wastewater containing organic pollutants in order, evenly stirring and mixing, adding persulfate of 3-15 mmol/L, and performing a Fenton oxidation reaction for 20-120min. The modified biochar based composite Fenton catalyst and the pollution treatment method can effectively improve the degradation efficiency of the organic pollutants.

Description

Technical field: [0001] The invention relates to a method for treating organic pollution, in particular to a method for constructing a composite Fenton-like catalyst based on modified biochar and pyrite and degrading organic pollutants in water. Background technique: [0002] At present, the water pollution problem caused by the massive discharge of organic pollutants such as dyes, pesticides, and antibiotics has had a serious impact on the ecological environment and human health. Advanced oxidation technology is an important method for treating organic pollutants. Among them, ferrous ions (Fe 2+ ) and hydrogen peroxide to form a Fenton reaction system, which can generate hydroxyl radicals with strong oxidizing ability, and is suitable for oxidation treatment of most organic pollutants in water. In addition, persulfate can also interact with Fe 2+ A Fenton-like reaction occurs to produce strong oxidizing sulfate radicals, which can oxidize and degrade organic pollutants in...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J27/20C02F101/30
CPCC02F1/725B01J27/20C02F2101/30C02F2305/026
Inventor 李建法朱晓晓冯冬青李益民吕金红
Owner SHAOXING UNIVERSITY
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