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Methods for oxidizing and degrading organic contaminants in water by utilizing multiphase catalyst to strengthen Fenton technology

A technology of heterogeneous catalysts and organic pollutants, applied in the fields of oxidized water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of incomplete oxidative degradation, consumption of hydroxyl radicals, low efficiency, etc. problem, to achieve the effect of high recycling efficiency, not easy to consume, and improve processing efficiency

Inactive Publication Date: 2009-12-09
HARBIN INST OF TECH
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Problems solved by technology

[0004] The present invention aims to solve the problems that the existing Fenton process for oxidatively degrading organic pollutants in water has low efficiency of Fenton reaction oxidation ability, Fenton reagent itself consumes hydroxyl radicals and incomplete oxidative degradation, and provides a method for strengthening the Fenton process by using a heterogeneous catalyst Method for Oxidative Degradation of Organic Pollutants in Water

Method used

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  • Methods for oxidizing and degrading organic contaminants in water by utilizing multiphase catalyst to strengthen Fenton technology
  • Methods for oxidizing and degrading organic contaminants in water by utilizing multiphase catalyst to strengthen Fenton technology
  • Methods for oxidizing and degrading organic contaminants in water by utilizing multiphase catalyst to strengthen Fenton technology

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specific Embodiment approach 1

[0011] Specific embodiment one: this embodiment utilizes heterogeneous catalyst to strengthen the method for oxidative degradation of organic pollutants in water by Fenton process to carry out according to the following steps: 1. Pretreatment: the water containing organic pollutants is carried out through grille, sedimentation tank and adjustment tank Physical treatment, control the hydraulic retention time to 20-40 minutes; 2. Enter the pretreated water into the reactor filled with multi-phase catalyst, add iron ions and H 2 o 2 Solution, control the concentration of iron ions in the reactor to be 0.2-20mg / L, H 2 o 2 The molar concentration ratio to iron ions is 5-10:1, and the residence time of water is 10-40 minutes; 3. The water treated in step 2 is discharged after solid-liquid separation; that is, the oxidative degradation of organic pollutants in water is completed ; Wherein the iron ion in the step 2 is Fe 2+ and / or Fe 3+ In step 2, the heterogeneous catalyst in th...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is: in step 1, the hydraulic retention time is controlled to be 25-35 minutes. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is: in step 1, the hydraulic retention time is controlled to be 30 minutes. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides methods for oxidizing and degrading organic contaminants in water by utilizing a multiphase catalyst to strengthen Fenton technology and relates to methods for oxidizing and degrading the organic contaminants in the water by the Fenton technology, solving the problem that the existing methods for oxidizing and degrading the organic contaminants in the water by the Fenton technology have low efficiency of the Fenton reaction oxidizing capability, self hydroxy free radical consumption of an Fenton reagent and incomplete oxidation and degradation. One method of the invention is carried out according to the following steps of: 1, carrying out pretreatment; 2, adding iron ions and H2O2 solution into a reactor filled with a multiphase catalyst; 3, carrying out solid-liquid separation, namely, completing the oxidation and degradation of the organic contaminants in the water. The other method of the invention is carried out according to the following steps of: 1, carrying out pretreatment; 2, supplying oxygen and adding iron ions and H2O2 solution into a reactor filled with a multiphase catalyst; 3, carrying out aerobic biological treatment; and 4, carrying out solid-liquid separation, namely, completing the oxidation and degradation of the organic contaminants in the water. The two methods for oxidizing and degrading the organic contaminants in the water have the advantages of high efficiency and complete degradation.

Description

technical field [0001] The invention relates to a method for oxidizing and degrading organic pollutants in water by a Fenton process. Background technique [0002] The Fenton (Fenton oxidation reaction) process has more prominent advantages in oxidative degradation of organic pollutants in water: H 2 o 2 React with iron ions to produce strong oxidizing hydroxyl radicals (oxidation-reduction potential of 2.8V) that can quickly and non-selectively oxidize organic pollutants; iron is an element that exists widely in nature and is non-toxic, and as a catalyst for Fenton's reagent will not cause Side effects; also as the H of the oxidizing agent in Fenton's reagent 2 o 2 It is an environmentally friendly reagent and will not cause secondary pollution; compared with other advanced oxidation technologies, the Fenton process has simple operating equipment and convenient maintenance, and is the most extensive and effective method for removing organic pollutants in the water treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/72
Inventor 马军庞素艳江进欧阳锋皇甫小留刘永泽
Owner HARBIN INST OF TECH
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