矿化(土壤科学)
光催化
恩诺沙星
哌嗪
化学
环境化学
藻类
生物化学
抗生素
氮气
有机化学
生态学
生物
催化作用
环丙沙星
作者
Zhikun Lu,Yifeng Xu,Lai Peng,Chuanzhou Liang,Yiwen Liu,Bing‐Jie Ni
出处
期刊:Chemosphere
[Elsevier]
日期:2022-01-04
卷期号:293: 133523-133523
被引量:29
标识
DOI:10.1016/j.chemosphere.2022.133523
摘要
The coupling of photocatalytic and algal processes has been used for the removal of widespread antibiotics. The removal capacities of the individual and the combined system against enrofloxacin were tested and compared in this work. Due to the low tolerance of the algae to enrofloxacin, the target compound was barely degraded during the individual algal treatment. In the individual photocatalytic process, the mineralization efficiency (defined as the ratio between the produced carbon dioxide and the initial) reached ∼57% with the remaining formed as transformation products. In contrast, a two-stage treatment incorporating photocatalytic and algal processes removed enrofloxacin completely and increased the mineralization efficiency to ∼64% or more. The addition of the citric acid as external co-substrate further elevated the mineralization efficiency with a factor of 1.25 compared to that of the individual photocatalysis. Different degradation products in both individual and integrated processes were identified and compared. The degradation pathways were found to involve the attack of the piperazine moiety and quinolone core. The results indicated the potential application of the combined photocatalytic-algal treatment in removal of veterinary antibiotics and improved our understanding of the underlying mechanisms and pathways.
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