Bai Zhiyong, Wang Jianlong, Yang Qi
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.
Environ Sci Pollut Res Int. 2017 Apr;24(10):9337-9349. doi: 10.1007/s11356-017-8619-z. Epub 2017 Feb 23.
The advanced treatment of municipal secondary effluent was performed by catalytic ozonation using FeO-CeO/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 UV 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.
以FeO-CeO/MWCNTs为催化剂，通过催化臭氧化对城市二级出水进行深度处理。实验结果表明，在催化臭氧化体系中，反应30min后可溶性COD的去除率超过46%，约36%的出水有机物（EfOMs）被矿化，这比单一臭氧化体系高出四倍。此外，反应30min后蛋白质、腐殖酸和紫外线明显下降，但多糖没有显著下降。在催化臭氧化体系中，臭氧利用率提高，有利于EfOM的降解。有机化合物和碱度是城市二级出水中主要的羟基自由基消耗物质。催化臭氧化过程对两种目标微污染物（磺胺二甲嘧啶和卡马西平）的降解也有效。该催化剂在对出水进行五次催化臭氧化重复使用后仍可保持稳定。
