均相阳离子隔离阴阳极室电化学降解含酚废水实验及其动力学研究

在隔离阴阳极室的条件下进行电化学法降解含酚废水实验 ,结果表明 ,在 2 5～ 4 5℃的低温范围内 ,苯酚的转化率能达到 95 %以上。反应动力学研究揭示 ,其活化能Ea =12 75～ 16 0 6kJ mol,与一般化学反应的活化能Ea =6 0～2 5 0kJ mol相比 ,本实验的活化能很低 ,即反应所要克服的势能垒很低 ,反应更易进行 ,这是电化学脱酚速率快 ,降解彻底的重要原因 ;另外 ,不同电解液对比实验显示 ,降解苯酚时在碱性电解液中更为有效

ELECTROLYSIS EXPERIMENT FOR DEGRADATION OF PHENOLIC WASTEWATER & ITS DYNAMICS:SEPARATING CATHODE FROM ANODE BY A EVEN CATION FILM

The electrolysis experiments on the degradation of phenolic wastewater were carried out under the condition of separating the cathode from the anode by a even cation film.The results showed that the phenol degradation rate was up to more than 95% at the normal or lower temperature ( t =25～45℃),and increased with the rising of the temperature.Parallel tests suggested that the alkaline electrolyte was in favor of dephenolization.Dynamic study reveals that the electrolysis dephenolization follows the one step reaction dynamics; the obtained energy of activation Ea= 12.75～16.06 kJ/mol,much less than those of common chemical reactions ( Ea=60～250 kJ/mol),which proves the de phenol process to be feasible,speedy and complete.