中国环境科学
中國環境科學
중국배경과학
CHINA ENVIRONMENTAL SCIENCE
2014年
9期
2285-2291
,共7页
Pd/Ti电极%2,4,6-三氯酚%电催化%还原脱氯%动力学
Pd/Ti電極%2,4,6-三氯酚%電催化%還原脫氯%動力學
Pd/Ti전겁%2,4,6-삼록분%전최화%환원탈록%동역학
Pd/Ti electrode%2,4,6-TCP%electrocatalysis%reductive dechlorination%kinetics
利用电沉积法制备了 Pd/Ti 电极,用于2,4,6-三氯酚(2,4,6-TCP)的电还原脱氯.采用单因素实验和响应面分析法,探讨了2,4,6-TCP脱氯试验条件；根据实验结果,拟合出了脱氯中各步骤的反应速率常数.结果表明,2,4,6-TCP初始浓度为80mg/L时,优化的脱氯参数为电流为5mA,支持电解质Na2SO4浓度为0.05mol/L,阴极电解液初始pH值为2.40.在优化条件下,2,4,6-TCP在80min内完全脱氯；2,4,6-TCP的还原脱氯符合准一级反应动力学,主要脱氯途径为2,4,6-TCP→2,6-DCP→2-CP→苯酚.
利用電沉積法製備瞭 Pd/Ti 電極,用于2,4,6-三氯酚(2,4,6-TCP)的電還原脫氯.採用單因素實驗和響應麵分析法,探討瞭2,4,6-TCP脫氯試驗條件；根據實驗結果,擬閤齣瞭脫氯中各步驟的反應速率常數.結果錶明,2,4,6-TCP初始濃度為80mg/L時,優化的脫氯參數為電流為5mA,支持電解質Na2SO4濃度為0.05mol/L,陰極電解液初始pH值為2.40.在優化條件下,2,4,6-TCP在80min內完全脫氯；2,4,6-TCP的還原脫氯符閤準一級反應動力學,主要脫氯途徑為2,4,6-TCP→2,6-DCP→2-CP→苯酚.
이용전침적법제비료 Pd/Ti 전겁,용우2,4,6-삼록분(2,4,6-TCP)적전환원탈록.채용단인소실험화향응면분석법,탐토료2,4,6-TCP탈록시험조건；근거실험결과,의합출료탈록중각보취적반응속솔상수.결과표명,2,4,6-TCP초시농도위80mg/L시,우화적탈록삼수위전류위5mA,지지전해질Na2SO4농도위0.05mol/L,음겁전해액초시pH치위2.40.재우화조건하,2,4,6-TCP재80min내완전탈록；2,4,6-TCP적환원탈록부합준일급반응동역학,주요탈록도경위2,4,6-TCP→2,6-DCP→2-CP→분분.
Pd loaded Ti electrode (Pd/Ti electrode) was prepared by electrodeposition method and was applied to 2,4,6-TCP dechlorination. The dechlorination parameters were investigated by means of single factor experiment and response surface analysis methods. Reaction rate constants of the possible steps in 2,4,6-TCP dechlorination were fitted out by using the experimental data. The optimized dechlorination condition of 2,4,6-TCP was obtained. i.e., current was 5mA, supporting electrolyte Na2SO4 concentration was 0.05mol/L and initial pH of catholyte was 2.40. Under the above conditions, 2,4,6-TCP with a concentration of 80mg/L could be completely dechlorinated in 80min. Dechlorination of 2,4,6-TCP followed pseudo first order kinetics. The main pathway of 2,4,6-TCP dechlorination was 2,4,6-TCP→2,6-DCP→2-CP→phenol.
