Experiments were conducted to investigate the degradation of 2,6-dinitro-p-cresol(DNPC)in the chlorine dioxide(ClO_(2))catalytic oxidation process.Pure aluminum oxide was used as the catalyst in this process.The degra...Experiments were conducted to investigate the degradation of 2,6-dinitro-p-cresol(DNPC)in the chlorine dioxide(ClO_(2))catalytic oxidation process.Pure aluminum oxide was used as the catalyst in this process.The degradation of DNPC by ClO_(2) using aluminum oxide as catalyst was systematically studied by varying the experimental parameters,such as pH values,catalyst dosage,the initial concentration of DNPC and ClO_(2),reaction time,etc.Under optimal condition(DNPC concentration 39 mg$L–1,ClO_(2) concentration 0.234 g$L–1,reaction time 15 min,catalyst dosage 4.7 g$L–1 and pH 4.32),almost complete degradation of DNPC can be achieved.The kinetic studies revealed that the ClO_(2) catalytic oxidation degradation of DNPC followed pseudo-first-order kinetics with respect to both ClO_(2) and DNPC concentration.The repetitive use of the catalyst was investigated along sequential feed-batch trials.The catalyst performed efficiently afterfive runs.In addition,a simple and convenient method for the determination of ClO_(2) in water was developed by using acid chrome black 7(MB 7)spectrophotometry in this paper.展开更多
基金financial support provided by the National Natural Science Foundation of China(Grant No.20977013).
文摘Experiments were conducted to investigate the degradation of 2,6-dinitro-p-cresol(DNPC)in the chlorine dioxide(ClO_(2))catalytic oxidation process.Pure aluminum oxide was used as the catalyst in this process.The degradation of DNPC by ClO_(2) using aluminum oxide as catalyst was systematically studied by varying the experimental parameters,such as pH values,catalyst dosage,the initial concentration of DNPC and ClO_(2),reaction time,etc.Under optimal condition(DNPC concentration 39 mg$L–1,ClO_(2) concentration 0.234 g$L–1,reaction time 15 min,catalyst dosage 4.7 g$L–1 and pH 4.32),almost complete degradation of DNPC can be achieved.The kinetic studies revealed that the ClO_(2) catalytic oxidation degradation of DNPC followed pseudo-first-order kinetics with respect to both ClO_(2) and DNPC concentration.The repetitive use of the catalyst was investigated along sequential feed-batch trials.The catalyst performed efficiently afterfive runs.In addition,a simple and convenient method for the determination of ClO_(2) in water was developed by using acid chrome black 7(MB 7)spectrophotometry in this paper.
