60Cogamma-ray irradiation for degrading five fish drugs of chloramphenicol, sulphadimidine, terramycin, oxolinic acid and furazolidone

Abstract

The invention relates to 60Cogamma-ray irradiation for degrading five fish drugs of chloramphenicol, sulphadimidine, terramycin, oxolinic acid and furazolidone. In the invention, a water solution containing the five fish drugs generates chemical reaction through the irradiation to generate free radicals of .OH with extremely strong oxidability, hydrated electron of eaq- with extremely strong reducibility, and .H, wherein among the free radicals, the .OH free radical can generate addition reaction with an aromatic series compound or unsaturated groups, the hydrated electron of eaq- can utilizes the low-power empty orbit contained by the reactant aromatic series group to be quickly added on the groups, and the .H free radical can be added on the groups after the reactants are subjected to dehalogenation reaction, thereby causing the degradation of the five fish drugs. The invention has relatively obvious effect on the five fish drugs, wherein the larger the dosage of the absorbent is, the higher the degradation rate of the drugs is; the lower the initial concentration is, the more beneficial to removing the residual drugs; alkalinity, acidity and the deaeration treatment have different influences on the degradation rate of different drugs; and the low-temperature treatment can obviously inhibit the degradation of the drugs.

Description

technical field [0001] The invention relates to a method for degrading five fishery medicines remaining in water: chloramphenicol, sulfamethazine, oxytetracycline, oxquinic acid and furazolidone. Background technique [0002] Antibiotics such as tetracyclines, chloramphenicols, sulfonamides, quinolones, and nitrofurans are widely used in aquatic product farming. NY 5070-2002 Pollution-free Food and Aquatic Products Residue Limits of Fishery Drugs stipulates that the maximum limits of tetracyclines, chloramphenicols, sulfonamides, quinolones, and nitrofurans are 100 μg / kg, non-detectable, and 100 μg / kg, respectively. , 300μg / kg, shall not be detected. Studies have shown that while irradiation technology has been widely used in improving food safety, preservation, storage, and extending shelf life, it can also degrade some toxic and harmful substances. Punya Temcharoen et al. [1] conducted gamma-ray irradiation on peanut cakes containing a certain amount of aflatoxin AFB1. T...

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Problems solved by technology

[0003] However, there is still a lack of systematic research on the effect of irradiation on the degradation of various types of fishery drugs, and there is no systematic research report on the structure identification and safety evaluation of irradiation intermediates and irradiation products.

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