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Method for degrading organic pollutant in water through activated persulfate

A technology for activating persulfate and organic pollutants, used in chemical instruments and methods, oxidized water/sewage treatment, water/sewage treatment, etc., can solve problems such as secondary pollution, achieve cost reduction, rapid mass transfer, and reduced Effects of drug consumption and energy consumption

Active Publication Date: 2016-02-10
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for activating persulfate to degrade organic pollutants in water, and at the same time solve the problem of secondary pollution caused by the generation of a large amount of sulfate ions when traditional persulfate degrades organic matter

Method used

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  • Method for degrading organic pollutant in water through activated persulfate

Examples

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Effect test

Embodiment 1

[0019] A method of activating persulfate degradation water organic pollutants of the present invention is applied to the treatment of printing and dyeing wastewater containing 10mg / L rhodamine, and its concrete steps are as follows:

[0020] (1). Prepare 100mL60g / L sodium hydroxide solution, which is recorded as solution A;

[0021] (2). Prepare 100 mL of a mixed solution of magnesium nitrate and aluminum nitrate with a molar ratio of 3:1, and record it as solution B;

[0022] (3). Stir vigorously to mix the solution B, and add the solution A solution to the solution B, and continue to stir for 90 minutes to obtain a composite solution;

[0023] (4). Heat the above composite solution, keep the temperature at 65°C, let it stand for 20 hours, take it out after natural cooling, and obtain emulsion C;

[0024] (5). Put the emulsion C into the printing and dyeing wastewater to be treated. The volume ratio of the printing and dyeing wastewater to be treated and the emulsion is 10:1...

Embodiment 2

[0026] The present embodiment is basically the same as Example one, and the difference is that the potassium persulfate solid is added as described in the above step (5), the mass concentration of potassium persulfate after stirring and dissolving is 100mg / L, and the water sample is taken after the reaction for determination , among which, the removal rate of rhodamine in printing and dyeing wastewater is 96.9%.

Embodiment 3

[0028] This example is basically the same as Example 1, the difference is that the step of adding potassium persulfate in the operation step (5) in Example 1 is omitted, and the water sample is taken after the reaction for measurement. The clear removal rate is 13.8%.

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Abstract

The invention discloses a method for degrading organic pollutant in water through activated persulfate. The method comprises the steps that 1, an alkali medicament solution is prepared to be used as a solution A; 2, a divalent metal salt and trivalent metal salt mixed solution B is prepared according a certain proportion; 3, the alkali medicament solution A is added into the solution B, and stirring is performed continuously for 30-120 min to obtain a composite solution; 4, the composite solution is heated, the temperature of 50-80 DEG C is kept constant, standing is performed for 4-24 h, and the composite solution is taken out after being cooled to obtain an emulsion C; 5, the cooled emulsion C is added into a water sample to be processed, and a persulfate solution of the certain mass concentration is added, stirring is performed for a reaction, the persulfate is activated by the emulsion to degrade organic matter in the water sample to be processed to be converted into sulfate ions which are absorbed by emulsion particles, the organic matter is degraded and secondary pollution is eliminated. According to the method, after being used for activating the persulfate, the emulsion finally forms metal hydroxide precipitates, adverse effects are generated for follow-up processes, and the method is applied to processing printing and dyeing wastewater with 10 mg / L rhodamine and has the high removal rate.

Description

technical field [0001] The invention belongs to the technical field of drinking water and waste water treatment, in particular to a method for activating persulfate to degrade organic pollutants in water. technical background [0002] The removal of organic pollutants in the field of water treatment has always been a research hotspot. As a powerful oxidizing agent, persulfate has the characteristics of easy transportation, strong stability, easy solubility in water and easy mass transfer, and has been widely used. [0003] Persulfate is relatively stable, and its mechanism of action on organic matter is to generate strong oxidative sulfate radicals under the action of external conditions such as heating, ultraviolet light (UV), transition metal ions, and strong alkaline environment, thereby degrading organic matter. Persulfate activation technology is divided into homogeneous and heterogeneous two. Heterogeneous technology uses different solid catalysts to realize the oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/58C02F1/28
Inventor 黄鑫苏曼刘齐珍黄智峰苏德龙周吉峙
Owner SHANGHAI UNIV
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