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Method for removing organic pollutants in water by ferrate reinforced ozone oxidation

A technology of organic pollutants and ferrate, which is applied in the field of water treatment, can solve the problems of large impact, low effective concentration of ozone and hydroxyl radicals, and large dosage of ozone, so as to reduce ozone dosage, reduce capture consumption, low-volume effect

Active Publication Date: 2015-11-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing ozone oxidation method is greatly affected by the background components in water, and the effective concentration of ozone and hydroxyl radicals is low, resulting in a large amount of ozone dosage, and provides a method of using ferrate to strengthen ozone oxidation removal Water Treatment Method for Organic Pollutants in Water

Method used

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specific Embodiment approach 1

[0008] Specific implementation mode 1: In this implementation mode, the method of using ferrate to strengthen ozone oxidation to remove organic pollutants in water is realized according to the following steps:

[0009] Add 0.1-30mg / L ferrate to the source water containing organic pollutants for pre-oxidation treatment, stir and react for 1-30min, then inject 0.2-30mg / L of ozone to continue the stirring reaction, so as to complete ferrate-enhanced ozone oxidation Removing organic pollutants in water; wherein the ferrate is one or a mixture of potassium ferrate and sodium ferrate.

[0010] The dosage of ferrate in this embodiment is calculated by Fe. When the ferrate is a mixture of potassium ferrate and sodium ferrate, it can be mixed in any ratio. Add 0.1-30 mg / L ferrate to the source water containing organic pollutants, which means that the concentration of ferrate in the source water is 0.1-30 mg / L.

[0011] The ferrate described in this embodiment is a green oxidizing age...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that the concentration of organic pollutants in the source water containing organic pollutants is 0.00001-1000 μg / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the organic pollutants are nitrobenzene, estradiol, estrone, estriol, diethylstilbestrol, 17α-ethinyl estradiol, Isoflavones, zearalenone, nonylphenol, octylphenol, carbamazepine erythromycin, sulfamethoxazole, trimethoprim, roxithromycin, ofloxacin, ifloxacin, Atenolol, Diazepam, Ketoprofen, Norsterol, Carbamazepine, Naproxen, Ibuprofen, Clotrimazole, Paracetamol, Iodomethazine, Chloramphenicol, Diclofenac, Bezafibrate , Dimethylphenoxyheptanoic acid, carbamazepine, atrazine, dichlorvos, glyphosate, chlorpyrifos, heptachlor, malathion, pentachlorophene, BHC, dimethoate, parathion, bentazone, Methyl parathion, chlorothalonil, carbofuran, lindane, deltamethrin, 2,4-D, DDT, cyanide, 1,1-dichloroethylene, 1,2-dichloroethylene, 1,2 -Dichlorobenzene, 1,4-dichlorobenzene, trichloroethylene, trichlorobenzene, hexachlorobutadiene, acrylamide, tetrachloroethylene, toluen...

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Abstract

The invention relates to a water treatment method, particularly a method for removing organic pollutants in water by ferrate reinforced ozone oxidation, which aims to solve the problem of high ozone addition amount due to great influence by background components and low effective concentrations of ozone and hydroxy free radicals in the existing ozone-oxidation-process exposed water. The treatment method comprises the following steps: adding ferrate into source water containing organic pollutants to perform preoxidation treatment, stirring to react, introducing ozone, and continuing stirring to react, thereby removing the organic pollutants in water by ferrate reinforced ozone oxidation, wherein the ferrate is one or mixture of potassium ferrate and sodium ferrate. The ferrate is used as a strong oxidant, has a co-oxidation action with ozone, and reduces the trapping consumption of the background component for ozone and hydroxy free radicals. Compared with the oxidation by single ozone, the pollutant removal rate is enhanced by 30-50%, and the ozone addition amount is decreased by 20-50%.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a method for removing organic pollutants in water by ozone oxidation. Background technique [0002] Ozone oxidation is widely used in water treatment. As a strong oxidizing agent, ozone can effectively remove color, smell and various organic micro-pollutants. Ozone oxidation alone is selective, and can only oxidize some organic pollutants (containing electron-rich groups), and most of them only change the structure and molecular weight, and the degree of mineralization is not high. Therefore, it is necessary to use catalytic ozone oxidation technology, such as UV / O 3 、H 2 o 2 / O 3 And transition metal catalysts catalyze the decomposition of ozone to produce hydroxyl radicals. Hydroxyl radicals are highly active species with strong oxidizing properties, and have no selectivity for the oxidation of organic matter, which can greatly improve the removal efficiency of organic micro-po...

Claims

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Application Information

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IPC IPC(8): C02F1/72C02F1/78C02F101/30
Inventor 马军黄壮松江进刘玉蕾杨涛肖佳月
Owner HARBIN INST OF TECH
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