Kinetics and Mechanism of Humic Acids Degradation by Ozone in the Presence of CeO2/AC

被引：20
作者：
Qin, Hangdao [1 ,2 ]
Dong, Qingzhi [1 ,2 ]
Chen, Honglin [1 ]
Yang, Guo [1 ,2 ]
Zhang, Xiaoming [1 ]
机构：
[1] Chinese Acad Sci, Chengdu Inst Organ Chem, Chengdu 610041, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
OZONE-SCIENCE & ENGINEERING | 2015年 / 37卷 / 04期
关键词：
Cerium oxide; Catalytic ozonation; Ozone; Landfill leachate; Humic acids; Activated carbon; CATALYTIC OZONATION; ACTIVATED CARBON; WATER; OXIDATION; CERIA; DECOMPOSITION; DOM;
D O I：
10.1080/01919512.2015.1006725
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This work investigated the catalytic ozonation of humic acids extracted from landfill leachate in the presence of CeO2/AC with focus on the kinetics of humic acids degradation. It was confirmed that the degradation of humic acids mainly took place in the solution bulk. The direct and indirect reaction constants of ozone against humic acids were determined. By analyzing the contributions of direct ozone oxidation and indirect center dot OH radicals oxidation to humic acids removal, it was found that center dot OH radicals oxidation predominated at all pH, indicating that the catalytic ozonation of humic acids with CeO2/AC involved center dot OH radicals mechanism.
引用
收藏
页码：371 / 378
页数：8
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