The use of zero-valent iron for groundwater remediation and wastewater treatment: a review.
Recent industrial and urban activities have led to elevated concentrations of a wide range of contaminants in groundwater and wastewater, which affect the health of millions of people worldwide. In recent years, the use of zero-valent iron (ZVI) for the treatment of toxic contaminants in groundwater and wastewater has received wide attention and encouraging treatment efficiencies have been documented. This paper gives an overview of the recent advances of ZVI and progress obtained during the groundwater remediation and wastewater treatment utilizing ZVI (including nanoscale zero-valent iron (nZVI)) for the removal of: (a) chlorinated organic compounds, (b) nitroaromatic compounds, (c) arsenic, (d) heavy metals, (e) nitrate, (f) dyes, and (g) phenol. Reaction mechanisms and removal efficiencies were studied and evaluated. It was found that ZVI materials with wide availability have appreciable removal efficiency for several types of contaminants. Concerning ZVI for future research, some suggestions are proposed and conclusions have been drawn.
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China. Electronic address: fufenglian2006@163.com.
Fenglian
F
Fu
Environmental Engineering and Science Program, University of Cincinnati, Cincinnati, OH 45221-0012, USA.
Dionysios D
DD
Dionysiou
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 401122, PR China.
Hong
H
Liu
D004396:Coloring Agents / Q000032:analysis; D052918:Environmental Restoration and Remediation / Q000379:methods*; D060587:Groundwater / Q000032:analysis*; D006861:Hydrogen Peroxide; D007501:Iron / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis; D014865:Waste Disposal, Fluid / Q000379:methods*; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D018508:Water Purification
D004396:Coloring Agents; C045076:Fenton's reagent; D019216:Metals, Heavy; D006861:Hydrogen Peroxide; D007501:Iron
Contaminants; Groundwater; Remediation/Treatment; Wastewater; Zero-valent iron (ZVI)