Cobalt-Organic Framework Material Activates Persulfate To Repair Tetracycline Antibiotic Medical Wastewater

Since the first discovery of antibiotics,antibiotics have been widely developed and applied.Some antibiotics have been used as drugs to treat human diseases or animal infections,and some have been widely used in animal husbandry because of their growth-promoting effects.Most of the antibiotics taken by humans and animals cannot be fully metabolized in the body,and eventually antibiotics will be excreted and then flow into the water environment to cause pollution.As one of the most widely used antibiotics in the world,the tetracycline antibiotics need to be dealt with urgently.Since the main source of contamination of tetracycline antibiotics is the wastewater generated by the manufacturing plant during production,how to effectively remove the tetracycline antibiotics produced in the pharmaceutical factory has become our research goal.In this paper,relatively new metal-organic framework materials are used as catalysts for advanced oxidation technology reactions.Among them,cobalt is used as the metal element.We use X-ray diffraction,X-ray photoelectron spectroscopy,Fourier transform infrared spectrometer,and scanning electron microscope And transmission electron microscopy were used to characterize the materials.According to the concentration of tetracycline hydrochloride and oxytetracycline hydrochloride in the production wastewater of the pharmaceutical manufacturing plant,a certain concentration of tetracycline hydrochloride and oxytetracycline hydrochloride solution is configured as the experimental object.And reaction temperature as experimental variable conditions,a new advanced oxidation technology combining cobalt-organic framework materials and sodium persulfate was studied in detail to catalyze the various influencing factors and conditions of the degradation of tetracycline antibiotics.The results of quenching experiments were used to explore the specific mechanism of the material's catalytic degradation of tetracycline antibiotics.Based on the results of the study,the following conclusions were obtained:?1?After characterizing the material,it was found that cobalt nitrate hexahydrate and trimesic acid can form a novel cobalt-organic framework?Co-BTC?material.?2?According to the removal effect of two representative tetracycline antibiotics selected in the experiment,the newly prepared cobalt-organic framework material can efficiently promote the degradation of tetracycline hydrochloride and oxytetracycline hydrochloride.However,the degradation effect is affected by the p H in the solution.After the experiment in the alkaline environment,the results are much lower than the acidic or neutral environment.?3?During the optimization of the experimental reaction conditions,it was found that the results of changing the room temperature conditions of the experimental reaction showed that increasing the reaction temperature can promote the removal effect of the newly prepared cobalt metal organic framework material on oxytetracycline hydrochloride and tetracycline hydrochloride.?4?According to the data analysis after adding the radical quencher during the experiment,there are two kinds of substances:hydroxyl radical?^�OH?and sulfate radical(SO₄^-�)in the entire experimental system.However,according to the data of tert-butanol quenching hydroxyl radicals,tert-butanol does not inhibit the removal of antibiotics much,which indicates that the amount of hydroxyl radicals generated in the experimental system is small,and sulfate radicals play a leading role.