The Preparation Of Carbonized Resin Doping With Fe/cu And Its Degradation Mechanism Of Antibiotics By Activated Persulfate

In recent years,antibiotics have been widely used in production and daily life and the residual antibiotics in nature have seriously harm to the environment.So the treatment technology of antibiotics has been concerned.Among them,advanced oxidation technology based on persulfate（AOPs）is considered by more and more researchers as an effective method to treat antibiotic pollutants due to its efficiently,thorough treatment and wide application.And carbon material is a cheap and efficient activation material in the activation method of persulfate.In this paper,waste cation exchange resin（D001）as the precursor,doped iron metal and iron copper bimetal,respectively.And carbide synthesis of metal composite carbon material catalyst.The catalytic activity and mechanism of persulfate（PDS/PMS）for degradation of oxytetracycin（OTC）and carbamazepine（CBZ）were investigated.This study can reduce the disposal cost of waste resin（hazardous waste）,and provides a new idea for the recycling of waste resin and the process of antibiotic degradation in wastewater.The following is the research contents of this paper:（1）Waste resin（D001）was used to support iron,and a one-step carbonization method was used to prepare iron-carrying carbonized resin catalyst（Fe₃O₄@CR）.With OTC as the target pollutant,the degradation effect of Fe₃O₄@CR/PDS system on OTC was studied,and the optimal reaction conditions and catalytic factors of the reaction system were explored.Under the optimal reaction conditions of[PDS]=0.15g/L,[Fe₃O₄@CR]=0.3g/L and 25℃,76.4%OTC（20mg/L）was successfully degraded.When the p H value is between 3.0 and 7.0,the Fe₃O₄@CR/PDS system can degrade normally.It was found that the key free radicals for degradation of OTC in the reaction system were SO₄^·-and·OH.In addition,the conversion between Fe³⁺and Fe²⁺promoted the degradation of the reaction.During the reaction,terryteomycin mineralized into smaller molecules(C₁₄H₁₀O₃ and C₇H₁₁O)in three ways.（2）Fe-Cu bimetallic carbonized resin catalyst material（Cu Fe O₂@CR）was prepared by supporting Fe-Cu bimetallic.With CBZ as the target pollutant,the degradation performance of Cu Fe O₂@CR system on antibiotics in water was investigated,and the reaction mechanism and degradation path under this system were analyzed.It was found that 91.3%of CBZ（20mg/L）was successfully degraded under the optimal reaction conditions of[PMS]=0.2g/L,[Cu Fe O₂@CR]=0.3g/L and 25℃.Cu Fe O₂@CR has a wide range of p H（3.0-9.0）,and can still degrade 83.6%of CBZ after five cycles,indicating that it has a good stability.Doping iron and copper metal improves the catalytic activity and stability of the catalyst.The key active radicals in the reaction process are SO₄^·-,·OH and ¹O₂.The equilibrium conversion between Fe（III）/Fe（II）and Cu（II）/Cu（I）promotes the degradation of CBZ.During the reaction,CBZ is mineralized and degraded into smaller molecules（C₆H₆O₂,etc.）in three ways.