Preparation Of FeCo-LDH Activated Permonosulfate-Treated Antibiotics By Sacrificial Template Method

In recent years,antibiotics have been widely used in human medicine,animal husbandry and agriculture because of their ability to prevent and treat infectious diseases and are non-toxic to the human body.Excessive use or even abuse of antibiotics can cause them to enter the environment and harm to humans,animals and plants.Therefore,in order to avoid the appearance and deterioration of this phenomenon,controlling the use of antibiotics is the root solution,and it is urgent to explore an efficient and simple treatment for the antibiotics that have caused pollution.Since the advent of advanced oxidation technology,it has attracted more attention.This method mainly uses the active substances produced by the reaction system to achieve the purpose of oxidative degradation of pollutants.In this paper,by comparing various common advanced oxidation methods,it is found that the SO ₄^·-radicals generated by the advanced oxidation method based on peroxymonosulfate（PMS）not only has a higher standard reduction p otential,but also larger tolerance p H range（pH=2～9）,also has high selectivity to aromatic hydrocarbon structure organics and unsaturated bonds,has a longer half-life and higher oxidation efficience.Therefore,advanced oxidation methods based on PMS ha ve become a research hotspot in the field of environmental governance by virtue of these excellent characteristics.Since this method only relies on the SO ₄^·-radicals that can be generated by the PMS itself,it is of great significance to develop a cataly st that can efficiently activate PMS.This article focuses on the synthesis of Co-containing zeolite imidazolate framework materials based on the cobalt ion as the metal center（ZIF-67）.The method of in-situ etching,namely the sacrificial template method,is used to synthesize Iron-cobalt layered double hydroxide（FeCo-LDH）.Through the scanning electron microscope and X-ray diffractometer test results to analyze the changes in the template material and the main component contained in the FeCo-LDH.And by analyzing the test results of the X-ray electron spectrometer,the changes in the element distribution of the two materials and the specific element composition of the synthesized materials are known.Then analyze the results of fourier infrared spectroscopy to get the specific composition of the synthesized material.Since the template sacrifice method is used,in order to compare the relationship between the synthesized material and the template material,the specific surface area and pore size test can determine whether the synthesized FeCo-LDH inherits some excellent pore size performance of the template material.Combining these characterization tests can derive the specific transformation process,which is also a major innovation of this research experiment.Because the structure can often determine the characteristics.In order to explore the specific process of the synthesized FeCo-LDH catalyst to activate PMS,online scanning voltammetry was used to explore the possible electron transfer in the catalytic system,and the iron with low electronegativity in the catalyst can be found.Ions can transfer electrons to cobalt ions,and the charge-rich cobalt ions can transfer electrons to activate PMS to produce SO₄^·-radicals with oxidative degradation abil ity.And it is verified through experiments that FeCo-LDH-1.5 has the highest catalytic efficiency in the series of materials,and the degradation efficiency of 92%can be achieved within ten minutes.In order to explore the specific degradation process,t his paper also uses three-dimensional excitation emission matrix fluorescence spectro photometer 3D EEMs.The use of High performance liquid chromatography mass spectrometer to analyze the intermediate products produced in the reaction process and infer the most reliable degradation path,which is also the second major innovation of this research experiment.In order to explore the significance of the practical application of the FeCo-LDH-1.5/PMS catalytic system,the common tetracycline concentration changes,p H changes,inorganic ions and soluble organics and other influencing factors were simulated to judge the anti-interference ability of the catalytic system.Actual water bodies such as tap water,Xiangjiang River water and medical wastewater were used as experimental objects to explore the catalytic efficiency of the catalytic system.Through the comparison experiment with the homogeneous catalyst and the cycle experiment of the FeCo-LDH-1.5 catalyst,it can be concluded that the catalyst not only has h igh degradation efficiency,but also has high stability and recyclability characteristics.This research provides a simple method for the synthesis of layered double hydroxide catalyst,and the catalyst shows excellent performance and important practical a pplication in the advanced oxidation process of activated PMS.