为探究富营养化水体中藻类的新型治理技术，通过水热法和高温煅烧法，使颗粒活性炭（AC）表层上负载铜铁双金属氧化物Cu-FeOx，制得可回收的Cu-FeOx@AC复合催化剂。以XRD、SEM、FTIR和XPS对Cu-FeOx@AC的表征为基础，研究Cu-FeOx占AC的负载比、过一硫酸盐（PMS）使用量、初始pH及不同反应体系对除藻的影响，探究Cu-FeOx@AC活化过一硫酸盐体系的除藻效能。Cu-FeOx@AC活化过一硫酸盐体系反应机理，通过自由基淬灭实验、XPS表征进行探究。结果可知，初始pH为6，初始藻浓度为1.4×109个·L-1，使用催化剂0.5 g·L-1，PMS 0.2 g·L-1时，反应90 min，该体系对藻的降解率有97.25%。在该体系中，藻细胞能被吸附在Cu-FeOx@AC复合催化剂表面，在铜、铁不同价态离子的转换及AC的协同作用下，产生空穴、〖"·O" 〗_"2" ^"-" 、"·OH" 、〖" SO" 〗_"4" ^"·-" ，单线态氧等多种氧化基团而被去除。

The Cu-FeOx@AC composite catalyst, recyclable Cu-Fe bimetallic oxides, was prepared to explore the new algal treatment technology in eutrophic water. Hydrothermal method and high-temperature calcination method were used to make Cu-FeOx loaded on the surface of granular activated carbon. Then, the composite catalyst was characterized by XRD, SEM, FTIR and XPS. At the same time, the effects of Cu-FeOx loading ratio to AC, amount of PMS, initial pH and different reaction systems on algae removal were studied, and the effects of Cu-FeOx@AC activated PMS system on algae removal were studied. Free radical shielding experiments and XPS analysis were carried out to explore the reaction mechanism of Cu-FeOx@AC activated PMS system. The experimental results showed that when the initial pH is 6, the initial algae concentration is 1.4×109 L-1, the catalyst dosage is 0.2 g·L-1, and the PMS dosage is 0.5 g·L-1, the degradation rate of algae can reach 97.25% in 90 min. In this reaction system, algal cells can be adsorbed on the face of Cu-FeOx@AC. Under the valence conversion between the Fe and Cu, and the synergistic reaction of AC, the holes, 〖"·O" 〗_"2" ^"-" , "·OH" ,〖" SO" 〗_"4" ^"·-" and singlet oxygen could be produced by composite catalyst, to remove the algal cells.

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重庆市建设科技项目(城科字2020第5-2)