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Radiolytic decomposition of ciprofloxacin using gamma irradiation in aqueous solution

文献类型： 外文期刊

作者： Guo, Zhaobing 1 ; Zhu, Shengnan 1 ; Zhao, Yongfu 3 ; Cao, Hui 1 ; Liu, Fengling 1 ;

作者机构： 1.Nanjing Univ Informat Sci & Technol, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China

2.Collaborat Innovat Ctr Atmospher Environm & Equip, Nanjing 210044, Jiangsu, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Applicat Atom Energy Agr, Nanjing 210044, Jiangsu, Peoples R China

关键词： gamma irradiation;Ciprofloxacin;Cr6+;Degradation pathways

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

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收录情况： SCI

摘要： Gamma irradiation-induced decomposition of ciprofloxacin (CIP) was elucidated with different additives, such as CO32-, NO3-, NO2-, humic acid, methanol, 2-propanol, and tert-butanol. The results show that low initial concentration and acidic condition were favorable for CIP removal during gamma irradiation. By contrast, radiolytic decomposition of CIP was inhibited with the addition of anions and organic additives. As a strong carcinogen, Cr6+ was especially mixed with CIP to produce combined pollution. It is noteworthy that the removal of the mixture of CIP and Cr6+ presented a synergistic effect; the degradation efficiency of the two pollutants was markedly improved compared to that of the single pollutant during gamma irradiation. Based on the results of quantum chemical calculations and LC-MS analysis, we determined seven kinds of degradation intermediates and presented the CIP degradation pathways, which were mainly attributed to the oxidation process of hydroxyl radicals OH and the direct decomposition of CIP molecules.

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[2]Gamma irradiation-induced sulfadiazine degradation and its removal mechanisms. Guo, Zhaobing,Zhou, Fei,Zhang, Chaozhi,Liu, Fengling,Bao, Chunxiao,Lin, Mingyue,Guo, Zhaobing,Zhou, Fei,Zhang, Chaozhi,Liu, Fengling,Bao, Chunxiao,Lin, Mingyue,Zhao, Yongfu.

[3]Gamma irradiation-induced decomposition of sulfamethoxazole in aqueous solution: the influence of additives, biological inhibitory, and degradation mechanisms. Wang, Jinjin,Guo, Ziyan,Shen, Xiaoyu,Zhu, Shengnan,Guo, Zhaobing,Wang, Jinjin,Guo, Ziyan,Shen, Xiaoyu,Zhu, Shengnan,Guo, Zhaobing,Wang, Jinjin,Guo, Ziyan,Shen, Xiaoyu,Zhu, Shengnan,Guo, Zhaobing,Guo, Qingjun,Zhao, Yongfu.

[4]Decomposition of dexamethasone by gamma irradiation: Kinetics, degradation mechanisms and impact on algae growth. Guo, Zhaobing,Guo, Anke,Rui, Maoling,Zhang, Haixiao,Zhu, Shengnan,Guo, Zhaobing,Guo, Anke,Rui, Maoling,Zhang, Haixiao,Zhu, Shengnan,Guo, Qingjun,Zhao, Yongfu.

[5]Influence of irradiation dose on free volume and microstructure of SIB biblock copolymer study by PALS and FT-IR. Jiang Zhong-Ying,Yu Wei-Zhong,Zhao Yong-Fu,Jiang Xi-Qun,Xia Yuan-Fu. 2006

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