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Method for treating water by Fenton oxidization of activated molecular oxygen

Inactive Publication Date: 2011-09-07
HUAZHONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, CN1708579A discloses an invention patent titled "Application of metal coordination compounds as catalysts for oxidation with molecular oxygen or air", which uses metal coordination compounds as activated molecular oxygen catalysts for washing, cleaning, disinfection, and bleaching processes ; CN101302141 discloses an invention patent titled "a method for directly synthesizing phenol by catalyzing molecular oxygen liquid-phase oxidation of benzene", which relates to a method for directly synthesizing phenol, which solves the problem of the high cost of existing methods for directly synthesizing phenol and the problem of low yield; CN101284774 discloses an invention patent titled "Directly Using Molecular Oxygen Catalytic Oxidation to One-Step Preparation of Glyceric Acid", the method provides a method for directly adopting molecular oxygen catalytic oxidation to prepare glyceric acid in one step, using glycerol as Glyceric acid is prepared by batch-type one-step reaction in the presence of oxygen and under the action of activated carbon or graphite-supported metal catalysts.

Method used

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  • Method for treating water by Fenton oxidization of activated molecular oxygen
  • Method for treating water by Fenton oxidization of activated molecular oxygen

Examples

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Effect test

Embodiment 1

[0018] Example 1: Fenton oxidation treatment of landfill leachate by activating molecular oxygen

[0019] Take 400mL of landfill leachate, adjust the pH to 6, and COD to 1835mg / L. Air is introduced into the wastewater to make the dissolved oxygen concentration in the water 0.5 mg / L, and 80 mg of iron sulfate is added. After 120 minutes, the COD of the wastewater is 632 mg / L, and the removal rate of organic pollutants is about 65%.

Embodiment 2

[0020] Example 2: Fenton oxidation treatment of landfill leachate by activating molecular oxygen

[0021] Take 400mL of landfill leachate, adjust the pH to 5, and the COD is 1987mg / L. Air is introduced into the wastewater to make the dissolved oxygen concentration in the water 1.0 mg / L, and 200 mg of ferric oxide is added. After 120 minutes, the COD of the wastewater is 598 mg / L, and the removal rate of organic pollutants is about 70%.

Embodiment 3

[0022] Embodiment 3: Fenton oxidation treatment of explosives wastewater by activating molecular oxygen

[0023] Take 400mL of explosive waste water after flocculation, pH=5.5, COD is 1530mg / L. Oxygen is introduced into the wastewater to make the concentration of dissolved oxygen in the water 1.2 mg / L, and 300 mg of copper sulfate is added. After 120 minutes, the COD of the wastewater is 543 mg / L, and the removal rate of organic pollutants is about 65%.

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Abstract

The invention provides a method for treating water by the Fenton oxidization of activated molecular oxygen. In the method, transition metal ions, transition metal and transition metal oxides are used as activated molecular oxygen catalysts to generate hydroxyl radicals, so that organic matters in wastewater are removed by oxidization. Compared with a Fenton water treatment technology in which hydrogen peroxide is used as an oxygen source, the method has the advantages that: in a Fenton reaction of the activated molecular oxygen, molecular oxygen in air and oxygen are used as the oxygen sourcedirectly, so the oxygen source is wide, convenient and low in cost, and the water treatment cost is reduced greatly. The method for treating the water by the Fenton oxidization of the activated molecular oxygen is suitable for the treatment of various kinds of organic wastewater, high in durability and efficiency, is environment-friendly and easy to operate, does not have secondary pollution, meets the requirement of actual water treatment units, and has large application potential in the field of environmental pollution regulation.

Description

technical field [0001] The invention relates to a method for removing organic matter in water by Fenton oxidation of activated molecular oxygen, and belongs to the technical field of water pollution control. Background technique [0002] Fenton oxidation is a widely researched and applied advanced oxidation technology, which is suitable for the treatment of certain refractory or biologically toxic industrial wastewater such as phenols, aromatic amines, aromatic hydrocarbons, pesticides and nuclear waste. Fenton's reagent has a very strong oxidizing ability because it can catalyze the generation of hydroxyl radicals (OH), which has a stronger oxidation electrode potential (2.8V) than other oxidants, and has a stronger oxidation electrode potential (2.8V) than ozone (O 3 , 2.07V), and hydrogen peroxide (hydrogen peroxide, 1.77V) are 35% and 59% higher respectively, and the oxidation ability is second only to fluorine; in addition, OH also has high electronegativity (electrophi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/74
Inventor 张礼知艾智慧范艳贾法龙
Owner HUAZHONG NORMAL UNIV
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