The Removal Of The Typical Antibiotics From Aquaculture Wastewater By Potassium Ferrate(?)

The antimicrobials used in aquaculture have been a new type of micro-pollutants,which have the potential endanger toward the human and aquatic organisms health.Recently,with the rapid development of aquaculture,will be use a lot of antibacterial agents in the process of breeding.Because of these antimicrobial agents are difficult to be degraded,a large amount of antibiotics have been detected in the process of wastewater discharge,which has caused serious harm to human health and the ecological environment.Fluoroquinolones are one of the major antimicrobial agents.Due to the difficult nature of these antibiotics,the conventional water treatment process has been difficult to completely go out.As a new type of water treatment agent for oxidation,flocculation and disinfection,ferrate has a good prospect in the degradation of such antibiotics.This article mainly explores the Enrofloxacin and Norfloxacin by potassium ferrate(VI),and research the effects of potassium ferrate dosage,reaction time,pH value,humic acid and coexisting ion.The results showed that the pH value of the reaction solution was 7,the molar ratio of potassium permanganate to Enrofloxacin was 40: 1,the reaction time was 60 min,the initial concentration of Enrofloxacin was 1 mg / L,the removal rate can reach to 96.59 %;The pH value of the solution was 7,the reaction time was 60 min,the molar ratio of potassium ferrate to Norfloxacin was 30: 1,the initial concentration of Norfloxacin was 1 mg / L,the removal rate can reach to 91.49%.Na+?K+?Mg2+?Ca2+ in the reaction solution had little effect on the removal rate of Enrofloxacin and Norfloxacin,and SO42-promoted the removal of these two antibiotics weakly.CO32-will inhibit the degradation rate of these two antibiotics significantly,and with the increase of ion concentration,the inhibitory effect is enhanced.In the solution,the different concentrations of humic acid will have different effects on the degradation of these two antibiotics.The degradation rate of these two antibiotics decreases with the increase of humic acid concentration,but when the concentration of humic acid is less than 2 mg / L,the impact is not obvious.Potassium ferrate oxidized Enrofloxacin,two possible degradation products were detected,and the possible degradation pathways of Enrofloxacin were deduced.