Method for processing organic wastewater by using MnOX/Fe0 nano composite material to activate persulfate

A nano-composite material, a technology for activating persulfate, applied in water/sewage treatment, chemical instruments and methods, reduced water/sewage treatment, etc., which can solve the problems of inability to magnetic recovery, difficulty in PMS recovery, and agglomeration of nano-zero valent iron. , to achieve the effects of complete crystallization, excellent redox activity, and improved dispersibility and stability

Active Publication Date: 2019-02-01
HEFEI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] MnO in prior art 2 / PMS catalytic reaction system, although it has high catalytic activity, but due to MnO 2 / PMS recovery is difficult, unable to magnetic recovery
Although nano-scale zero-valent iron has the characteristics of strong reducibility and high specific surface area, nano-zero-valent iron is prone to agglomeration

Method used

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  • Method for processing organic wastewater by using MnOX/Fe0 nano composite material to activate persulfate
  • Method for processing organic wastewater by using MnOX/Fe0 nano composite material to activate persulfate
  • Method for processing organic wastewater by using MnOX/Fe0 nano composite material to activate persulfate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare organic wastewater samples to be tested:

[0032] Add 1 mg, 10 mg, 100 mg, and 1,000 mg of bisphenol A to 1,000 ml of surface water to obtain organic wastewater samples to be tested with concentrations of 1 mg / L, 10 mg / L, 100 mg / L, and 1,000 mg / L, respectively.

[0033] Process the above organic wastewater samples to be tested:

[0034] (1) Preparation of MnO X / Fe 0 Nanocomposites:

[0035] The natural manganese ore with a manganese oxide content of 90wt% was crushed to a particle size of 3.7 μm and then calcined at 600°C for 3 hours to obtain the active ingredient MnO x The mineral powder, by weight ratio of 1:1.2 FeCl 2 4H 2 O and the active ingredient containing MnO x The mineral powder is added to the mixed solvent of water and ethanol and stirred for 24 hours, then fully mixed. The volume ratio of ethanol and water is 4:1. After filtering and drying, add an aqueous solution of sodium borohydride with a concentration of 10mol / L Carry out reduction re...

Embodiment 2

[0047] Prepare organic wastewater samples to be tested:

[0048] Add 1mg, 10mg, 100mg, 1000mg, 2000mg of 2,4-dichlorophenol to the surface water of 1000ml respectively to obtain concentrations of 1mg / L, 10mg / L, 100mg / L, 1000mg / L, 2000mg / L respectively Test organic wastewater samples.

[0049] Process the above organic wastewater samples to be tested:

[0050] (1) Preparation of MnO X / Fe 0 Nanocomposites:

[0051] The natural manganese ore with a manganese oxide content of 80wt% is ground to a particle size of 1 μm and then calcined at 300°C for 4 hours to obtain the active ingredient MnO x The mineral powder, by weight ratio of 1:1 FeSO 4 ·7H 2 O and the active ingredient containing MnO x The mineral powder is added to the mixed solvent of water and ethanol and stirred for 30 hours, then fully mixed. The volume ratio of ethanol and water is 1:1. After filtering and drying, add an aqueous solution with a concentration of 5mol / L dissolved in potassium borohydride Carry ...

Embodiment 3

[0063] Prepare organic wastewater samples to be tested:

[0064] Add 0.5mg, 10mg, 100mg, 1000mg, 3000mg of antibiotics-norfloxacin to 1000ml of surface water respectively to obtain concentrations of 0.5mg / L, 10mg / L, 100mg / L, 1000mg / L, 3000mg / L Organic wastewater samples to be tested.

[0065] Process the above organic wastewater samples to be tested:

[0066] (1) Preparation of MnO X / Fe 0 Nanocomposites:

[0067] The natural manganese ore with a manganese oxide content of 85wt% is ground to a particle size of 10 μm and then calcined at 900° C. for 2 hours to obtain the active ingredient MnO x Mineral powder, FeCl in a weight ratio of 1:1.5 3 ·6H 2 O and the active ingredient containing MnO x The mineral powder is added to the mixed solvent of water and ethanol and stirred for 30 hours, then fully mixed, filtered, and dried, and the aqueous solution with a concentration of 1mol / L dissolved in sodium borohydride is added to carry out the reduction reaction to obtain a pr...

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PUM

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Abstract

The invention provides a method for processing organic wastewater by using a MnOX / Fe0 nano composite material to activate persulfate. The method comprises the following steps: pulverizing natural manganese ore and calcining the material to obtain mineral powder containing an active component MnOx, fully mixing the iron salt and the mineral powder containing the active component MnOx, and then adding a reducing agent to carry out a reduction reaction to obtain the MnOX / Fe0 nano composite material; adding the obtained MnOX / Fe0 nano composite material and persulfate to the organic wastewater, andprocessing the organic wastewater under stirring condition. The method for processing the organic wastewater by using the MnOX / Fe0 nano composite material to activate persulfate can perform catalyticdegradation on various organic substances in organic wastewater, and has high purification efficiency, simple method, and easy operation, few types of reagents required, and the cost is low.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method using MnO X / Fe 0 Nanocomposite activated persulfate method for treating organic wastewater. Background technique [0002] With the rapid development of industry, the application of organic products is also increasing, and the number and types of organic pollutants are increasing year by year. There are a lot of organic pollution problems in both water and air. For example, with the increasing development of the chemical industry, a large number of toxic and harmful organic pollutants are discharged into rivers, among which dye wastewater contains refractory organic pollutants, which is one of the typical refractory industrial wastewater, with high COD and high chroma , complex composition, high toxicity, and poor biodegradability. Traditional water pollution treatment technologies, such as adsorption method, flocculation sedimentation method, microbial m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/70C02F101/34
CPCC02F1/705C02F1/722C02F2101/345
Inventor 鲍腾俞志敏邓呈逊卫新来张勇路思恒
Owner HEFEI UNIV
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