Plackett-Burman法筛选电-Fenton降解水中盐酸四环素的主要因素

Application of Plackett Burman Design for Screening Key Factors for Electro-Fenton Degradation of Tetracycline Hydrochloride in Water

以RuO_(2)-TiO_(2)/Ti为阳极,石墨为阴极,构建电-Fenton体系氧化降解水中盐酸四环素(TC),分别考察溶液初始pH、温度、H_(2)O_(2)投加量等因素对TC降解效果的影响及作用机理,并引入Plackett-Burman法筛选影响电-Fenton降解TC的显著单因素。结果表明:当TC浓度为100μmol/L时,各单因素试验的最佳条件为pH=3、温度为30℃、H_(2)O_(2)投加量为10 mmol/L、电流强度为0.5 A、H_(2)O_(2)/Fe^(2+)摩尔比为16:1、电解质浓度为0.1 mol/L、极板间距为2.5 cm,其中溶液初始pH、电流强度与电解质浓度为该电-Fenton氧化体系下降解TC的显著单因素。

An electro-Fenton system for the oxidative degradation of tetracycline hydrochloride(TC)in water was construded using RuO_(2)-TiO_(2)/Ti as the anode and graphite as the cathode.The effects of initial pH,temperature,H_(2)O_(2) dosage and other factors on the degradation effect of TC and the mechanism of action were investigated respectively.The Plackett-Burman test was also introduced to screen for the significant single factors affecting the degradation of TC by the electro-Fenton oxidation system.The results showed that when the concentration of TC was 100μmol/L,the best conditions for each single-factor experiments were as follows:pH=3,temperature was 30℃,H_(2)O_(2) dosage was 10 mmol/L,current intensity was 0.5 A,H_(2)O_(2)/Fe 2+molar ratio was 16:1,electrolyte concentration was 0.1 mol/L and pole plate spacing was 2.5 cm.And the significant single factors for the decrease in TC of this electro-Fenton oxidation system were the initial pH of the solution,the current strength and the electrolyte concentration.