Electrochemical degradation of tetracycline by multiwalled carbon nanotube modified electrode
Based on the preparation and characterization of the previous modified electrode,cyclic voltammetry(CV)and differential pulse voltammetry(DPV)were used to study the electrochemical behavior of tetracycline on the multiwalled carbon nanotube(MWCNTs)modified electrode,and the determination conditions such as the citric acid-sodium citrate buffer solution pH,MWCNTs modified amount and scanning rate were discussed and optimized.The optimal electrochemical degradation conditions were determined as follows:the pH of the citric acid-sodium citrate buffer solution was 3.5,modification amount of MWCNTs was 20 μL,scanning rate was 80 mV/s,and the initial tetracycline concentration of solution was 0.5 mg/mL.The effects of bias,initial concentration of solution and degradation time on tetracycline degradation were studied by chronocurrent method.The results showed that bias pressure had little effect on tetracycline degradation.The higher the initial concentration of solution,the slower the degradation rate of tetracycline.With the increase of degradation time,the removal rate of tetracycline gradually increased,and there was a good linear relationship between tetracycline concentration and degradation time,with a linear coefficient of 0.981.
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维普
