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Application of Sodium Peroxosulfate

A technology of sodium peroxosulfate and sodium sulfate, which is applied in the field of water pollution treatment, can solve the problems of low decomposition rate and achieve the effects of simple operation, cost saving and improvement of utilization efficiency

Active Publication Date: 2019-03-19
INST OF SOIL SCI CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN 101559929 discloses a stable EHP preparation method, which is prepared from sodium sulfate, sodium chloride and hydrogen peroxide aqueous solution and crystallization aids, and the decomposition rate of the product is lower than 2%.
[0009] In recent years, although there have been a few reports on the preparation, properties and applications of EHP, there has been no report on the use of EHP as an oxidant to degrade high COD polluted wastewater

Method used

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  • Application of Sodium Peroxosulfate
  • Application of Sodium Peroxosulfate
  • Application of Sodium Peroxosulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The waste water sample of the lake was taken, and its COD concentration was 7240mg / L, pH=7.3. The EHP and wastewater samples were mixed according to the solid-to-liquid ratio of 1:10, 2:10, and 3:10 (g / mL) respectively, and the EHP was fully dissolved.

[0020] After reacting for 5, 10, 15, and 20 days at a room temperature of 20±2°C, the COD concentration of each wastewater sample was measured and the degradation rate was calculated. The analysis results are shown in Table 1.

[0021] The COD degradation rate of table 1 embodiment 1 waste water

[0022]

[0023] The results of Example 1 show that COD is 7240mg / L waste water after 15-20 days of degradation, the degradation rate of COD reaches 92%, and the maximum degradation rate can be reached when the solid-liquid ratio is 2:10, when the solid-liquid ratio is 1:10 When the waste water COD degradation rate is only 63%.

Embodiment 2

[0025] The waste water sample of the lake was taken, and its COD concentration was 7240mg / L, pH=7.3. Regulate the pH of waste water with the sulfuric acid of 1mol / L to be 3, add ferrous sulfate heptahydrate, make ferrous ion content in waste water be 0.5mmol / L, EHP and waste water sample are respectively 1:10, 2:1 by solid-liquid ratio 10 (g / mL) mixed, and completely dissolved EHP. After carrying out the control test according to Example 1, the COD concentration of each wastewater sample was measured respectively and the degradation rate was calculated. The analysis results are shown in Table 2.

[0026] The COD degradation rate of table 2 embodiment 2 waste water

[0027]

[0028] The results of Example 2 show that EHP can directly degrade the COD of polluted wastewater under a neutral pH. Compared with Example 1, the degradation rate of COD is basically the same, and there is no need to add a ferrous ion catalyst, which reduces operating steps and costs.

Embodiment 3

[0030] Take the wastewater samples from the lake, the wastewater COD concentrations are 1650mg / L, 3250mg / L, 14080mg / L, pH=7.3, and the degradation reaction is carried out. The EHP and wastewater samples were mixed according to the solid-liquid ratio of 1:25 (1650mg / L), 2:25 (3250mg / L), 10:25 (14080mg / L) (g / mL), that is, the peroxide in EHP The initial concentration of COD and wastewater COD concentration is about 5:2 (mg / L). Carry out the test according to Example 1, after reacting for 25 days, measure the COD concentration of each wastewater sample respectively and calculate the degradation rate, and the analysis results are shown in Table 3.

[0031] The COD degradation rate of table 3 embodiment 3 waste water

[0032]

[0033] Example 3 results show that when the initial concentration of peroxide radical in the EHP and the waste water COD concentration are about 5:2 (g / L), the waste water degradation rate can reach 92%, therefore, although the initial concentration of E...

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Abstract

The invention discloses the application of EHP which can be used for oxidative degradation of high-COD pollutant effluents.Operation is easy, and it is only needed to add EHP to wastewater for dissolution reaction.Besides, EHP also has a sterilization effect and meets the requirement for environment friendliness.A good degradation effect can be realized by directly adding EHP to high-COD pollutant effluents at room temperature, and degradation rate is as high as 92%.Operation is quite easy, cost is saved, and market application prospects are broad.

Description

technical field [0001] The invention relates to the field of water pollution treatment, in particular to the application of sodium peroxosulfate (EHP) in oxidative degradation of pollutants in waste water. Background technique [0002] Water is a material resource that humans and other living organisms depend on for survival. With the rapid development of industry, a large amount of toxic and harmful pollutants are discharged randomly, which has caused serious harm to the environment and human health. For example, various organic pollutants such as halogenated hydrocarbons and aromatic hydrocarbons are directly discharged or leaked into water bodies, which seriously pollute water, soil and the atmosphere. They not only have direct toxic effects on organisms, but also have Potential carcinogenic and teratogenic effects. [0003] At present, the treatment of organic pollutants has achieved certain research results at home and abroad, among which chemical oxidation is used fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/50
CPCC02F1/50C02F1/72
Inventor 宋昕陈星张微吕正勇张岩坤
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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