Method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation

Abstract

The invention relates to a method for degrading pentadecafluorooctanoic acid or perfluorooctane sulfonate through irradiation. The method includes the specific steps that a 20 mg / L pentadecafluorooctanoic acid aqueous solution and a 20 mg / L perfluorooctane sulfonate aqueous solution are prepared respectively, the pH value is adjusted to be 3-13, nitrogen and oxygen are introduced or a tert butyl alcohol solution is added, and the mixture is irradiated by electron beams; the energy of accelerated electrons of an accelerator is 1.8 MeV, the intensity of electronic beam current is 0-10 mA, processing time is 60-120 s, and irradiation dose is 100-500 kGy. The method has the advantages that degradation efficiency is high, reaction speed is high, generated radicals are high in oxidization and reduction performance, the applicability range is wide, controllability is high, the method can be matched with other processing technologies in use so as to reduce cost and meet processing requirements, and the method is an efficient energy-saving water treatment technology. By treating pentadecafluorooctanoic acid or perfluorooctane sulfonate in water through the electron beam irradiation method, quick degradation and effective defluorination can be achieved, and application prospects are good.

Description

technical field [0001] The invention relates to a method for treating organic compound sewage, in particular to a method for treating sewage containing perfluorinated compounds, which is applied in the technical fields of nuclear technology application, water treatment and environmental protection. Background technique [0002] Because perfluorinated compounds are hydrophobic, oleophobic, thermally stable, chemically stable and surface active, they are widely used in textiles, chemicals, electronics, pharmaceuticals, aviation, electroplating and many other fields. Perfluorooctane sulfonate and perfluorooctanoic acid, as the two most typical types of perfluorinated compounds, have been widely used in the manufacture of fire extinguishing agents, cleaning agents, additives, pesticides and other products. While perfluorinated compounds have been widely used, they have also brought many negative environmental problems, among which the pollution problem in the water environment i...

AI Technical Summary

Problems solved by technology

The existing methods for removing antidepressants in water bodies have high cost, poor removal rate and inconvenient use

Therefore, the research on the degradation of perfluorinated compounds by electron beam radiation technology is of great significance and value, but the method of using radiation to degrade perfluorooctanoic acid or perfluorooctane sulfonic acid in water has not been reported.

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