Method for degrading organic pollutant in water through activated persulfate

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...

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