Advanced treatment of municipal secondary effluent by catalytic ozonation using Fe3O4-CeO2/MWCNTs as efficient catalyst

被引:17
|
作者
Bai, Zhiyong [1 ,2 ]
Wang, Jianlong [1 ,3 ]
Yang, Qi [2 ]
机构
[1] Tsinghua Univ, Collaborat Innovat Ctr Adv Nucl Energy Technol, INET, Beijing 100084, Peoples R China
[2] China Univ Geosci, Sch Water Resources & Environm, Beijing 100083, Peoples R China
[3] Tsinghua Univ, INET, Beijing Key Lab Radioact Waste, Energy Sci Bldg, Beijing 100084, Peoples R China
基金
中国国家自然科学基金;
关键词
Catalytic ozonation; Secondary effluent; Ozone utilization; Advanced treatment; ADVANCED OXIDATION PROCESSES; NATURAL ORGANIC-MATTER; ANION-EXCHANGE RESIN; WASTE-WATER; AQUEOUS-SOLUTION; DRINKING-WATER; CERAMIC MEMBRANE; REMOVAL; OZONE; DEGRADATION;
D O I
10.1007/s11356-017-8619-z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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 UV254 decreased 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.
引用
收藏
页码:9337 / 9349
页数:13
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