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Method for degrading nitrobenzene wastewater by catalyzing double oxidants through natural ferromanganese mineral

A nitrobenzene wastewater, double oxidant technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low efficiency and achieve low iron and manganese The amount of exudation, abundant sources, and the effect of promoting chain reaction

Inactive Publication Date: 2020-05-22
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferromanganese minerals can effectively activate persulfate and hydrogen peroxide to oxidize and degrade organic pollutants, but the efficiency of activating persulfate to degrade organic pollutants is not high

Method used

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  • Method for degrading nitrobenzene wastewater by catalyzing double oxidants through natural ferromanganese mineral
  • Method for degrading nitrobenzene wastewater by catalyzing double oxidants through natural ferromanganese mineral
  • Method for degrading nitrobenzene wastewater by catalyzing double oxidants through natural ferromanganese mineral

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Effect test

Embodiment 1

[0041] The natural ferromanganese ore selected in this embodiment is used as a catalyst, and the oxidant A is hydrogen peroxide, and the oxidant B is sodium persulfate, and the catalytic oxidant A and the oxidant B degrade 2,4-dinitrotoluene with different initial concentrations, and the specific steps are as follows:

[0042] (1) Take a 120mL Erlenmeyer flask as a reactor, configure a 2,4-dinitrotoluene solution with an initial concentration of 5mg / L, select a reaction volume of 100mL, and set an initial pH of 7.13.

[0043] (2) Select No. 1 natural iron-manganese mineral. After XRF characterization, it is known that the iron oxide is 51.35%, the manganese oxide is 19.69%, and also contains other impurities. See Table 1 for details. The particle size is selected as 100 mesh. The addition amount was set to 1g / L, added to the reactor in step (1), the stirring was set at 250rpm, and the reaction was carried out for 10min.

[0044] (3) Add oxidant A to the reactor, choose to be h...

Embodiment 2

[0048] The natural ferromanganese ore selected in this embodiment is used as a catalyst, the oxidant A is hydrogen peroxide, and the oxidant B is potassium peroxomonosulfate, and the catalytic oxidant A and B degrade 2,4-dinitrotoluene with different initial concentrations, and the specific steps are as follows:

[0049] (1) Take a 120mL Erlenmeyer flask as a reactor, configure 2,4-dinitrotoluene solutions with an initial concentration of 5mg / L, 10mg / L, 15mg / L and 20mg / L, and select 100mL for the reaction volume. For 5mg / L 2,4-dinitrotoluene solution, adjust the pH to 3.03, 5.02, 7.03, 9.02 and 10.99.

[0050] (2) Select No. 2 natural iron-manganese minerals. After XRF characterization, it is known that iron oxides are 52.41%, manganese oxides are 10.93%, and other impurities are also contained. See Table 2 for details. The particle size is selected to be 100 mesh. Adding amount is set to 1g / L, add to the reactor in step (1), stir at 300rpm, and react for 30min.

[0051] (3) ...

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Abstract

The invention relates to a method for degrading nitrobenzene wastewater by catalyzing double oxidants through natural ferromanganese mineral. The method comprises the following steps: adding natural ferromanganese mineral into nitrobenzene wastewater, fully and uniformly mixing, continuously adding an oxidant A and an oxidant B, reacting for a period of time, and catalyzing the oxidants A and B bythe natural ferromanganese mineral to generate sulfate free radicals and hydroxyl free radicals so as to oxidatively degrading the nitrobenzene in the water body, so that the nitrobenzene is removed.According to the method, natural ferromanganese mineral is utilized, so that the method is rich in source, environment-friendly, recyclable, wide in pH application range and high in operability, andhas a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of remediation of organic polluted soil and groundwater, and in particular relates to a method for degrading nitrobenzene wastewater by a natural iron-manganese mineral catalyzed by a double oxidant. Background technique [0002] Nitrobenzene compounds (Nitrobenzene Compounds, NBCs) have persistent pollution to the environment and have strong "three-caused" toxicity. Many countries have listed them as priority pollutants. In recent years, NBCs pollution incidents have occurred frequently, and at the same time brought great harm to the water environment. How to thoroughly control the nitrobenzene in the water environment has become an urgent problem that countries all over the world need to solve. Because nitrobenzene compounds are highly toxic and refractory organic pollutants, traditional removal methods including adsorption, sedimentation, and filtration methods cannot degrade nitrobenzene compounds with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/66C02F1/72C02F101/38B01J23/889
CPCB01J23/8892C02F1/66C02F1/722C02F1/725C02F2101/38
Inventor 杨昱姜永海徐祥健夏甫韩旭廉新颖贾永锋万朔阳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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