Method for processing sulphuric acid free radical oxidized water

A treatment method, free radical technology, applied in the direction of oxidized water/sewage treatment, light water/sewage treatment, etc., can solve the problem of consuming large catalysts, and achieve the effects of environmental friendliness, fast reaction speed and high treatment efficiency

Inactive Publication Date: 2008-05-07
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fenton's reagent has the advantages of fast oxidation rate, simple equipment, mild reaction conditions, convenient operation, and high efficiency, but its disadvantages are also obvious, such as the reaction requires acidic conditions and consumes a large amount of catalyst

Method used

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  • Method for processing sulphuric acid free radical oxidized water
  • Method for processing sulphuric acid free radical oxidized water
  • Method for processing sulphuric acid free radical oxidized water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Industrial sewage contains anthracene, a polycyclic aromatic hydrocarbon, and the measured concentration is 0.712 mg / L. Adding potassium persulfate (K 2 S 2 O 8 ), add 29.6g K per 1000L sewage 2 S 2 O 8 . Under the irradiation of a 300W high-pressure mercury lamp, S in water 2 O 8 2- Cleavage of the peroxy bond produces sulfuric acid free radicals. After 5 minutes, the removal rate of anthracene reached more than 90% without adding K 2 S 2 O 8 Under the condition of , the removal rate of anthracene is only about 40%, the results are as follows image 3 shown.

Embodiment 2

[0023] After primary treatment of drinking water, sodium persulfate (Na 2 S 2 O 8 ), add 3gNa per 1000kg of drinking water 2 S 2 O 8 , After 254nm low-pressure mercury lamp irradiation, after 5 minutes of treatment, the total number of bacteria in the water was determined. Take 1 mL of water sample on beef extract peptone agar medium, and after culturing at 37°C for 24h, count the number of colonies. The number of drinking water before treatment is 500, and the total number of bacteria after treatment is 20, which is less than 100 in my country's regulations on drinking water, and fully meets my country's drinking water standards.

Embodiment 3

[0025] The drinking water was determined to contain trichloroethylene at a concentration of 1.5 mg / L, and potassium persulfate (K 2 S 2 O 8 ), add 74g K per 1000L drinking water 2 S 2 O 8 , After 4 hours of heating at 30 °C, trichloroethylene in drinking water was not detected, and it has been completely degraded, which fully meets my country's drinking water standards.

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Abstract

The invention relates to the application field of the high-level oxidation technique and the water treating technique, and provides a method using the high-level oxidation technique that produces vitriol free radical for treating organic contamination in water. persulfate or single peroxide hydrosulfate is used for producing vitriol free radical through pyrogenation, ultraviolet light photolysis, Gama radial eradiation decomposition or metal ion catalyze manner, having high oxidation active vitriol free radical that can react with the organic contamination in the water so as to degradate and mineralize the organic contamination and kill the living creatures in the water and reach the aim of purifying the water quality. The invention has the advantages that the method can be operated under the condition of neutral or alkalescent pH compared with the Fenton reagent; the method is friendly environment without producing secondary pollution; the method has high treating efficiency and rapid reaction speed so as to be suitable for treating water with big fluid; the method can be used for drinking water disinfection and industrial and life sewage treatment, thereby not only degradating the organic contamination in the water, but also killing the harmful living creatures in the water at the same time.

Description

technical field [0001] The invention relates to the application field of advanced oxidation technology and water treatment technology, in particular to a method for applying advanced oxidation technology that generates sulfuric acid radicals to the treatment of organic pollutants in water. Background technique [0002] my country is a water-scarce country, and per capita water resources are only a quarter of the world average. Water shortage has become the bottleneck of my country's economic development. With the development of economy, a large amount of industrial and domestic wastewater is produced at the same time, which often contains a large amount of toxic and refractory organic pollutants. Due to the stable chemical structure of some organic pollutants and difficult biodegradation, they exist in nature for a long time and are harmful to biological Toxic. Many sewage directly enters the environment without treatment, and these refractory organic pollutants enter the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/32
Inventor 刘瑀王德高李颖宋成文韩敏
Owner DALIAN MARITIME UNIVERSITY
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