...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Electrochemical Stimulation of Microbial Roxarsone Degradation under Anaerobic Conditions
【24h】

Electrochemical Stimulation of Microbial Roxarsone Degradation under Anaerobic Conditions

机译：厌氧条件下微生物罗沙酮降解的电化学刺激

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

Roxarsone (4-hydroxy-3-nitrophenylarsoruc acid) has been commonly used in animal feed as an organoarsenic additive, most of which is excreted in manure. Rorarsone is easily biodegraded to 4-hydroxy-3-aminophenylarsonic add (HAPA) under anaerobic conditions, but HAPA persists for long periods in the environment, increasing the risk of arsenic contamination through diffusion. We investigated the electrochemical stimulation of the microbial degradation of roxarsone under anaerobic conditions. After the carbon sources in the substrate were depleted, HAPA was slowly degraded to form arsenite under anaerobic conditions. The degradation rate of HAPA was significantly increased when 0.5 V was applied without adding a carbon source. The two-cell membrane reactor assays reveal that the HAPA was degraded in the anode chambers, confirming that the anode enhanced the electron transfer process by acting as an electron acceptor. The degradation product formed with electrochemical stimulation was arsenate, which facilitates the removal of arsenic from wastewater. Based on the high performance liquid chromatography- ultraviolet-hydride generation-atomic fluorescence spectrometry (HPLC-UV-HG-AFS) and gas chromatography-mass spectrometry (GC-MS) data, the pathway for the biodegradation of roxarsone and the mechanisms for the electrochemically stimulated degradation are proposed. This method provides a potential solution for the removal of arsenic from organoarsenic-contaminated wastewater.
机译：洛克沙s（4-羟基-3-硝基苯基砷酸）作为有机砷添加剂，通常在动物饲料中使用，其中大部分通过粪便排泄。罗勒松在厌氧条件下很容易被生物降解为4-羟基-3-氨基苯基ar酸加成物（HAPA），但HAPA在环境中长期存在，增加了砷扩散扩散的风险。我们研究了厌氧条件下洛克沙酮的微生物降解的电化学刺激。耗尽基材中的碳源后，HAPA在厌氧条件下缓慢降解以形成亚砷酸盐。在不添加碳源的情况下施加0.5 V时，HAPA的降解率显着提高。两室膜反应器测定表明，HAPA在阳极室中降解，从而证实阳极通过充当电子受体增强了电子转移过程。通过电化学刺激形成的降解产物是砷，这有助于从废水中去除砷。基于高效液相色谱-氢化物发生-原子荧光光谱法（HPLC-UV-HG-AFS）和气相色谱-质谱法（GC-MS）数据，得出了roxarsone的生物降解途径及其机理提出了电化学刺激的降解。该方法为从有机砷污染的废水中去除砷提供了潜在的解决方案。

著录项

  • 来源
    《Environmental Science & Technology》 |2014年第14期|7951-7958|共8页
  • 作者

    Lin Shi; Wei Wang; Shou-Jun Yuan; Zhen-Hu Hu;

  • 作者单位

    School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;

    School of Civil Engineering, Hefei University of Technology, Hefei 230009, China,Institute of Water Treatment and Wastes Reutilization, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;

    School of Civil Engineering, Hefei University of Technology, Hefei 230009, China,Institute of Water Treatment and Wastes Reutilization, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;

    School of Civil Engineering, Hefei University of Technology, Hefei 230009, China,Institute of Water Treatment and Wastes Reutilization, School of Civil Engineering, Hefei University of Technology, Hefei 230009, China;

  • 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