| 高藻饮用水系统中羟基自由基降解诺氟沙星 |
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| 引用本文： | 余忆玄,白敏冬,杨小桐,吉志新,李季,姚丽.高藻饮用水系统中羟基自由基降解诺氟沙星[J].中国环境科学,2018,38(12):4545-4550. |
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| 作者姓名： | 余忆玄 白敏冬 杨小桐 吉志新 李季 姚丽 |
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| 作者单位： | 1. 大连海事大学轮机学院, 辽宁 大连 116026;
2. 厦门大学环境与生态学院, 福建 厦门 361102;
3. 大连海事大学物理系, 辽宁 大连 116026;
4. 上海海事大学商船学院, 上海 201306 |
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| 基金项目： | 国家重大科研仪器研制项目（NSFC：61427804）;科技部创新人才推进计划重点领域创新团队（2015RA4008）;国家自然科学基金资助重大研究计划（91441132） |
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| 摘 要： | 在厦门翔安水厂12000t/d常规饮用水处理工艺的基础上建立了"混凝沉淀-砂滤-·OH/NaClO氧化降解抗生素及消毒-清水池"的处理系统,在九龙江流域高藻爆发期完成了工程化试验.结果表明,当砂滤出水总藻密度为2.04x103cells/mL时,注入相同氧化剂剂量0.5mg/L处理20s后,·OH将56ng/L的诺氟沙星降解至未检出,而NaClO仅降解至54ng/L.·OH在氧化降解抗生素的同时能杀灭全部藻细胞.根据HPLC-MS/MS检测到的降解中间产物分析,·OH氧化降解诺氟沙星通过进攻哌嗪环、萘啶环和氟原子破坏药效团,直至矿化为CO2和H2O.·OH消毒后不产生消毒副产物,检测的106项指标均达到国家《生活饮用水卫生标准》（GB 5749-2006）,为我国高藻饮用水中抗生素的安全处理提供技术支撑.
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| 关 键 词： | 羟基自由基 诺氟沙星 水华藻 消毒副产物 饮用水安全 |
| 收稿时间： | 2018-05-23 |
Degradation of norfloxacin by hydroxyl radicals in algae bloom drinking water system |
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| YU Yi-xuan,BAI Min-dong,YANG Xiao-tong,JI Zhi-xin,LI Ji,YAO Li.Degradation of norfloxacin by hydroxyl radicals in algae bloom drinking water system[J].China Environmental Science,2018,38(12):4545-4550. |
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| Authors: | YU Yi-xuan BAI Min-dong YANG Xiao-tong JI Zhi-xin LI Ji YAO Li |
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| Institution: | 1. College of Marine Engineering, Dalian Maritime University, Dalian 116026, China;
2. College of Environment and Ecology, Xiamen University, Xiamen 361102, China;
3. Department of Physics, Institute of Computational Physics, Dalian Maritime University, Dalian 116026, China;
4. Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China |
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| Abstract: | A water treatment system consisting of "coagulating sedimentation-sand filtration-·OH/NaClO antibiotic degradation and disinfection-clean water tank" was established with a capacity of 12000 t/d. A demonstration project was conducted during the period of algae bloom in Jiulong River. The total content of algae reached 2.04×103 cells/mL after sand filtration. Results show that under oxidant dosage of 0.5 mg/L within 20 s, ·OH degraded NFX from 56 ng/L to not detected, while NaClO only degraded to 54 ng/L. Meanwhile, ·OH inactivated all the algae cells. According to the analysis of HPLC-MS/MS, ·OH mineralized NFX into CO2 and H2O by breaking the C-F bond, and opening the piperazing, nalidixic and benzene rings. During ·OH disinfection, no disinfection by-products were formed and the 106 water indicators satisfied the Chinese Standard (GB5749-2006). This study provides a technology support to degrade antibiotics in algae bloom drinking water. |
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| Keywords: | hydroxyl radical norfloxacin algae disinfection by-products drinking water safety |
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