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Method for removing polycyclic aromatic hydrocarbon in water body by using iron-manganese bimetallic oxide modified biological carbon photo-Fenton composite material

A technology of bimetallic oxides and composite materials, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, water treatment of special compounds, etc., can solve the problem of slow regeneration rate of active sites and affecting degradation efficiency , Applicable to problems such as narrow pH range, to achieve strong hydrogen peroxide decomposition ability, improve catalytic performance, and good catalytic performance

Active Publication Date: 2019-04-19
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the following problems still exist when using photo-Fenton technology to remove polycyclic aromatic hydrocarbons (such as naphthalene) in water: (1) Homogeneous photo-Fenton technology has narrow applicable pH range, difficult recovery of catalyst, low material recycling rate and system (2) During the reaction process, the active sites on the surface of the photo-Fenton catalyst are constantly consumed, and the regeneration rate of the active sites is slow, which affects Degradation efficiency; (3) In the treatment of actual water bodies, due to the fact that there are a large number of coexisting ions in the actual water body, these coexisting ions may have an impact on the degradation of catalyzed oxidized naphthalene

Method used

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  • Method for removing polycyclic aromatic hydrocarbon in water body by using iron-manganese bimetallic oxide modified biological carbon photo-Fenton composite material
  • Method for removing polycyclic aromatic hydrocarbon in water body by using iron-manganese bimetallic oxide modified biological carbon photo-Fenton composite material
  • Method for removing polycyclic aromatic hydrocarbon in water body by using iron-manganese bimetallic oxide modified biological carbon photo-Fenton composite material

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Embodiment 1

[0045] A method for removing polycyclic aromatic hydrocarbons in water by using iron-manganese double-metal oxide modified biochar-photo-Fenton composite material, specifically using iron-manganese double-metal oxide-modified biochar-photo-Fenton composite material to remove naphthalene in water , including the following steps:

[0046] Weigh biochar monomer material (BC), iron manganese double metal oxide monomer material (FMBO) and iron manganese double metal oxide modified biochar photo-Fenton composite material (A1, A2, A3, A4, A5) , each 25mg, respectively added to 100mL, concentration of 30mg / L naphthalene solution (the pH value of the solution is 5.6), magnetically stirred for 1h under dark conditions, so that naphthalene reached adsorption-desorption equilibrium on the surface of the catalyst, adding 2mL, H at a concentration of 2 mol / L 2 o 2 solution, and then undergo a photo-Fenton reaction under visible light with a wavelength of 420nm to 780nm for 88 minutes, whe...

Embodiment 2

[0070] A method for removing naphthalene in water bodies by using iron-manganese double metal oxides to modify biochar light-Fenton composite materials, comprising the following steps:

[0071] Weigh respectively 25mg, 50mg, 100mg, 150mg, 200mg of the iron-manganese double metal oxide modified biochar photo-Fenton composite material (A3) obtained in Example 1, add respectively to the naphthalene solution of 100mL, 30mg / L ( The pH value of this solution is 5.5), in the dark condition magnetic stirring 1h, make naphthalene reach adsorption-desorption equilibrium on the catalyst surface, add 5mL, concentration is the H of 2mol / L 2 o 2 solution, and then undergo a photo-Fenton reaction under visible light with a wavelength of 420nm to 780nm for 88 minutes, wherein the photo-Fenton reaction is carried out under magnetic stirring to complete the degradation treatment of naphthalene in the water body.

[0072] During the photo-Fenton reaction, a sample was taken every 16 minutes. A...

Embodiment 3

[0077] A method for removing naphthalene in water bodies by using iron-manganese double metal oxides to modify biochar light-Fenton composite materials, comprising the following steps:

[0078] Take by weighing 5 parts of iron-manganese double metal oxide modified biochar photo-Fenton composite material (A3) obtained in embodiment 1, every part of 100mg, add respectively to the naphthalene solution of 100mL, 30mg / L (the pH of this solution value is 5.5), magnetically stirred for 1 h in the dark to make naphthalene reach adsorption-desorption equilibrium on the catalyst surface, and then add 1 mL, 2.5 mL, 5 mL, 7.7 mL and 10 mL of H 2 o 2 solution (these H 2 o 2 The concentration of the solution is 2mol / L), and the photo-Fenton reaction is carried out under visible light with a wavelength of 420nm-780nm for 88min, wherein the photo-Fenton reaction is carried out under magnetic stirring, and the degradation treatment of naphthalene in the water body is completed.

[0079] Dur...

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Abstract

The invention discloses a method for removing polycyclic aromatic hydrocarbons in a water body by using an iron-manganese bimetallic oxide modified biological carbon photo-Fenton composite material, which comprises the following steps: mixing the composite material with the water body containing the polycyclic aromatic hydrocarbons, stirring, adding hydrogen peroxide solution, and carrying out photo-Fenton reaction to complete the removal of polycyclic aromatic hydrocarbons in the water body, wherein the composite material comprises biochar and the iron-manganese bimetallic oxide attached to the biochar; the iron-manganese bimetallic oxide is a mixture of iron oxide and manganese oxide, wherein the iron oxide comprises Fe3O4 and Fe2O3, and the manganese oxide comprises Mn3O4 and Mn2O3. Themethod has the advantages of simple process, simple and convenient operation, low cost, high removal efficiency, good removal effect, wide application range, good recycling performance, environmentalfriendliness and the like, and the method can be widely adopted and can efficiently remove polycyclic aromatic hydrocarbons in the water body, and has high application value and commercial value.

Description

technical field [0001] The invention belongs to the field of advanced oxidation treatment in polluted environments, and relates to a method for treating polycyclic aromatic hydrocarbons, in particular to a method for removing polycyclic aromatic hydrocarbons in water bodies by using iron-manganese double metal oxides to modify biochar-light Fenton composite materials . Background technique [0002] Polycyclic aromatic hydrocarbons are a typical class of persistent toxic substances, which mainly come from the incomplete combustion process of fossil fuels and biomass. Although they are trace amounts in the environment, they are widely distributed and have good fat solubility. People can pass them through Intake of air, water, food, etc. PAHs are highly carcinogenic, mutagenic and teratogenic, and are the most carcinogenic single chemical species in the known environment. Therefore, the U.S. Environmental Protection Agency has listed 16 kinds of polycyclic aromatic hydrocarbo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/30B01J23/889C02F101/32
CPCB01J23/002B01J23/8892C02F1/30C02F1/722C02F1/725C02F2101/327C02F2305/023C02F2305/026C02F2305/10
Inventor 赖萃李玲黄芳龙程敏曾光明李必胜黄丹莲秦蕾刘希贵易欢柳诗语何江凡张玉锦史晓勋
Owner HUNAN UNIV
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