...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Degradation of the Common Aqueous Antibiotic Tetracycline using a Carbon Nanotube Electrochemical Filter
【24h】

Degradation of the Common Aqueous Antibiotic Tetracycline using a Carbon Nanotube Electrochemical Filter

机译：使用碳纳米管电化学过滤器降解常见的水性抗生素四环素

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In this work, a carbon nanotube (CNT) electrochemical filter was investigated for treatment of aqueous antibiotics using tetracycline (TC) as a model compound. Electrochemical filtration of 0.2 mM TC at a total cell potential of 2.S V and a flow rate of 1.5 mL min~(-1) (hydraulic residence time ＜2 s) resulted in an oxidative flux of 0.025 ± 0.001 mol h~(-1) m~(-2). Replacement of the perforated Ti cathode with a CNT cathode increased the TC oxidative flux by 2.3-fold to 0.020 ± 0.001 mol h~(-1) m~(-2) at a total cell potential of 1.0 V. Effluent analysis by liquid chromatography-mass spectrometry and disk agar biocidal diffusion tests indicate that the electrochemical filtration process can degrade the TC molecular structure and significantly decrease its antimicrobial activity, respectively. Addition of dissolved natural organic matter (NOM) negatively affected the TC electrooxidation because of competition for CNT sorption and electrooxidation sites. At 2.0 V total cell potential, TC spiked (0.2 mM) into drinking water reservoir and wastewater treatment plant effluent samples had an oxidative flux of 0.015 ± 0.001 and 0.022 ± 0.001 mol h~(-1) nT~(-2), respectively, and an energy requirement of 0.7 kWh kgCOD~(-1) or 0.084 kWh m~(-3). These results indicate a CNT electrochemical filter may have potential to effectively and efficiently treat antibiotics in water and wastewater effluent.
机译：在这项工作中，研究了使用四环素（TC）作为模型化合物的碳纳米管（CNT）电化学过滤器用于水性抗生素的处理。在总电池电位为2.SV且流速为1.5 mL min〜（-1）（水停留时间＜2 s）下电化学过滤0.2 mM TC产生的氧化通量为0.025±0.001 mol h〜（- 1）m〜（-2）。在CNT阴极上替换穿孔的Ti阴极使TC氧化通量增加2.3倍至0.020±0.001 mol h〜（-1）m〜（-2），总电池电势为1.0 V.通过液相色谱法进行流出物分析质谱和圆盘琼脂杀菌扩散试验表明，电化学过滤过程可分别降解TC分子结构并显着降低其抗菌活性。由于争夺CNT吸附位和电氧化位，因此添加溶解的天然有机物（NOM）会对TC电氧化产生负面影响。在总电池电势为2.0 V时，将TC（0.2 mM）加标到饮用水水库和废水处理厂废水样品中，其氧化通量分别为0.015±0.001和0.022±0.001 mol h〜（-1）nT〜（-2）。 ，能量需求为0.7 kWh kgCOD〜（-1）或0.084 kWh m〜（-3）。这些结果表明，CNT电化学过滤器可能具有有效和高效处理水和废水中抗生素的潜力。

著录项

  • 来源
    《Environmental Science & Technology》 |2015年第13期|7974-7980|共7页
  • 作者

    Yanbiao Liu; Han Liu; Zhi Zhou; Tianren Wang; Choon Nam Ong; Chad D. Vecitis;

  • 作者单位

    School of Engineering and Applied Sciences, Harvard University, Pierce Hall 120, 29 Oxford Street, Cambridge, Massachusetts 02138, United States,NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, #02-01, Singapore 117411;

    School of Engineering and Applied Sciences, Harvard University, Pierce Hall 120, 29 Oxford Street, Cambridge, Massachusetts 02138, United States;

    Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, E1A-07-03, Singapore 117576,Division of Environmental and Ecological Engineering and School of Civil Engineering, Purdue University, West Lafayette, Indiana 47907, United States;

    Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, E1A-07-03, Singapore 117576;

    NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, #02-01, Singapore 117411;

    School of Engineering and Applied Sciences, Harvard University, Pierce Hall 120, 29 Oxford Street, Cambridge, Massachusetts 02138, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号