Enhanced degradation of benzene by percarbonate activated with Fe(II)-glutamate complex

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• 作者：Xiaori Fu ; Xiaogang Gu ; Shuguang Lu…
• 关键词：Sodium percarbonate ; Benzene ; Fe(II) ; glutamate ; Reactive oxygen species ; Groundwater remediation
• 刊名：Environmental Science and Pollution Research
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：23
• 期：7
• 页码：6758-6766
• 全文大小：802 KB
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• 作者单位：Xiaori Fu (1)
  Xiaogang Gu (1)
  Shuguang Lu (1)
  Zhouwei Miao (1)
  Minhui Xu (1)
  Xiang Zhang (1)
  Muhammad Danish (1)
  Hang Cui (1)
  Usman Farooq (1)
  Zhaofu Qiu (1)
  Qian Sui (1)
  
  1. State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, 200237, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Effective degradation of benzene was achieved in sodium percarbonate (SPC)/Fe(II)-Glu system. The presence of glutamate (Glu) could enhance the regeneration of Fe(III) to Fe(II), which ensures the benzene degradation efficiency at wider pH range and eliminate the influence of HCO₃ − in low concentration. Meanwhile, the significant scavenging effects of high HCO₃ − concentration could also be overcome by increasing the Glu/SPC/Fe(II)/benzene molar ratio. Free radical probe compound tests, free radical scavenger tests, and electron paramagnetic resonance (EPR) analysis were conducted to explore the reaction mechanism for benzene degradation, in which hydroxyl radical (HO•) and superoxide anion radical (O₂ •−) were confirmed as the predominant species responsible for benzene degradation. In addition, the results obtained in actual groundwater test strongly indicated that SPC/Fe(II)-Glu system is applicable for the remediation of benzene-contaminated groundwater in practice.