Application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate

A technology for activating persulfate and organic pollutants, applied in water pollutants, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems that biochar cannot be effectively treated, and achieve High ability to activate persulfate, good recycling, environmental protection effect

Inactive Publication Date: 2020-09-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the present invention, the waste biochar after multiple adsorption of heavy metal ions-desorption is introduced into the persulfate system for activating sulfate to generate sulfate radicals (·SO 4 - ) to degrade persistent organic pollutants, which not only solves the problem that biochar that adsorbs heavy metals cannot be effectively treated, but also provides a new way for activating persulfate. It is easy to operate and low in cost, and can effectively help solve environmental problems. recyclable

Method used

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  • Application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate
  • Application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate
  • Application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate

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preparation example Construction

[0043] The preparation of biogas residue biochar in the embodiment:

[0044] (1) Soak the biogas residue after anaerobic fermentation in tap water for 24 hours, drain, wash with deionized water three times, let it dry in an oven at 105°C, and pass through a 100-mesh sieve after crushing and sieving for later use.

[0045] (2) Take 10 g of dry biogas slag powder and put it into a porcelain boat for compaction, put it into a tube furnace, raise the temperature to 700 °C at a rate of 10 °C / min under a nitrogen atmosphere, keep it warm for 2 hours, and bring it to room temperature. After taking it out, soak it with 1mol / L HCl for 12h, then wash it with deionized water until neutral, and finally dry it at 70°C to obtain biogas residue charcoal.

Embodiment 1

[0047] The application of the waste biochar after adsorption-desorption in activating persulfate to degrade persistent organic pollutants, the waste biochar is biochar with a mass percentage of Cu ions of 3% after three adsorption-desorption of Cu ions Slag biochar, the application steps are as follows:

[0048] Using the waste biochar after adsorption-desorption as a catalyst, add the waste biochar after adsorption-desorption into the organic pollutant wastewater, and add persulfate at the same time. The dosage of persulfate is 1mmol / L. The temperature is 28°C, and the pH is 2.0 to 11.0 under the condition of shaking. It degrades and removes persistent organic pollutants in wastewater. The mass volume ratio of catalyst to organic pollutant wastewater is 1:10, and the unit is g / L.

Embodiment 2

[0050] The same as the application of the waste biochar after adsorption-desorption described in Example 1 in activating persulfate to degrade persistent organic pollutants, the difference is that the mass volume ratio of catalyst to organic pollutant wastewater is 1:20, and the unit : g / L.

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Abstract

The invention relates to application of adsorbed-desorbed waste biochar in degrading persistent organic pollutants by activating persulfate, which comprises the following steps: by using the adsorbed-desorbed waste biochar as a catalyst, adding the adsorbed-desorbed waste biochar into organic pollutant wastewater, and adding the persulfate to degrade the persistent organic pollutants in the wastewater. According to the method, a new idea is provided for reutilization of the biochar after heavy metal ion adsorption, secondary pollution of the waste biochar after heavy metal adsorption is avoided, the solid waste disposal pressure is relieved, and the environment is protected. According to the method, the waste biochar is better recycled, resources are saved, the waste biochar is high in chemical stability and low in metal ion dissolution rate, the persulfate activating capacity is high, waste is turned into wealth, recycling can be achieved, and the waste biochar is used for treating the wastewater containing the organic pollutants through the heterogeneous persulfate oxidation technology and has broad application prospects. Organic matter removal rate is high.

Description

technical field [0001] The invention relates to the application of waste biochar after adsorption-desorption in activating persulfate to degrade persistent organic pollutants, and belongs to the technical fields of waste resource utilization, environment and chemistry. Background technique [0002] In recent years, with the rapid development of my country's industry, a large number of refractory organic pollutants, such as pharmaceutical compounds, pesticides and dyes, have been discharged into the environment through different channels, which has affected my country's water resources to varying degrees. It directly threatens the health of human body, animals and plants. Traditional physical, chemical and biological techniques cannot effectively remove these persistent organic pollutants, so advanced treatment processes are needed to achieve removal. The advanced oxidation technology based on activated persulfate is due to the sulfate radical ( SO 4 - ) has become a new te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72B01J23/755B01J23/72B01J21/18C02F101/30
CPCB01J21/18B01J23/72B01J23/755C02F1/725C02F2101/30
Inventor 高宝玉潘静文
Owner SHANDONG UNIV
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