Nitrate Reduction by Fe(0)/iron Oxide Mineral Systems: A Comparative Study using Different Iron Oxides
- Title
- Nitrate Reduction by Fe(0)/iron Oxide Mineral Systems: A Comparative Study using Different Iron Oxides
- Other Titles
- Nitrate Reduction by Fe(0)/iron Oxide Mineral Systems: A Comparative Study using Different Iron Oxides
- Author
- 전병훈
- Keywords
- Zero valent iron (Fe(0)); Iron oxide; Nitrate; Groundwater; Electron mediator
- Issue Date
- 2014-01
- Publisher
- Korean Society of Soil and Groundwater Environment
- Citation
- Journal of Soil and Groundwater Environment, Vol. 19, No. 1, 2014, pp.63-69
- Abstract
- This paper presents the feasibility of using different iron oxides (microscale hematite (HT), microscale magnetite (MT), and nanoscale maghemite (NMH)) in enhancing nitrate reduction by zero-valent iron (Fe(0)) under two solution conditions (artificial acidic water and real groundwater). Addition of MT and NMH into Fe(0) system resulted in enhancement of nitrate reduction compared to Fe(0) along reaction, especially in groundwater condition, while HT had little effect on nitrate reduction in both solutions. Field emission scanning electron microscopy (FESEM) analysis showed association of MT and NMH with Fe(0) surface, presumably due to magnetic attraction. The rate enhancement effect of the minerals is presumed to arise from its role as an electron mediator that facilitated electron transport from Fe(0) to nitrate. The greater enhancement of MT and NMH in groundwater was attributed to surface charge neutralization by calcium and magnesium ions in groundwater, which in turn facilitated adsorption of nitrate on Fe(0) surface.
- URI
- http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=JGSTB5_2014_v19n1_63http://hdl.handle.net/20.500.11754/47470
- ISSN
- 1598-6438; 2287-8831
- DOI
- 10.7857/JSGE.2014.19.1.063
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > EARTH RESOURCES AND ENVIRONMENTAL ENGINEERING(자원환경공학과) > Articles
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