title: Advanced treatment of municipal secondary effluent by catalytic ozonation using Fe3O4-CeO2/MWCNTs as efficient catalyst.
abstract: The advanced treatment of municipal secondary effluent was performed by catalytic ozonation using Fe3O4-CeO2/MWCNTs as catalyst. The experimental results showed that in catalytic ozonation system, the removal efficiency of soluble COD was more than 46% after 30 min reaction, and about 36% of effluent organic matters (EfOMs) were mineralized, which was four times higher than that in single ozonation system. Moreover, proteins, humic acids, and UV254decreased obviously after 30 min reaction, but polysaccharides did not significantly decrease. In catalytic ozonation system, the ozone utilization increased, which is favorable for the degradation of EfOM. The organic compounds and alkalinity were the main hydroxyl radical consumers in municipal secondary effluent. The catalytic ozonation process was also effective for the degradation of two target micropollutants (sulfamethazine and carbamazepine). The catalyst could be stable after five-time reuse for catalytic ozonation of effluent.
authors.affiliation: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing, 100084, People's Republic of China.|School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Bai
authors.affiliation: Collaborative Innovation Center for Advanced Nuclear Energy Technology, INET, Tsinghua University, Beijing, 100084, People's Republic of China. wangjl@tsinghua.edu.cn.|Beijing Key Laboratory of Radioactive Waste Treatment, INET, Tsinghua University, Energy Science Building, Beijing, 100084, People's Republic of China. wangjl@tsinghua.edu.cn.
authors.forename: Jianlong
authors.identifier: http://orcid.org/0000-0001-9572-851X
authors.initials: J
authors.lastname: Wang
authors.affiliation: School of Water Resources and Environment, China University of Geosciences, Beijing, 100083, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Yang
mesh_terms: D002384:Catalysis; D006812:Humic Substances; D010126:Ozone; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D006812:Humic Substances; D014874:Water Pollutants, Chemical; D010126:Ozone
keywords: Advanced treatment; Catalytic ozonation; Ozone utilization; Secondary effluent