A Comparative Study On Arsenic (III) Removal From Aqueous Solution Using Nano And Micro Sized Zero-Valent Iron
The present study was conducted for Arsenic (III) removal, one of the most poisonous groundwater pollutants, by synthetic nano and micro size zerovalent iron (n-mZVI). Batch experiments were performed to investigate the influence of As (III), nZVI and mZVI concentration, pH of solution and reaction...
Gespeichert in:
Veröffentlicht in: | Iranian journal of environmental health science & engineering 2011, Vol.8 (2), p.175-175 |
---|---|
Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | The present study was conducted for Arsenic (III) removal, one of the
most poisonous groundwater pollutants, by synthetic nano and micro size
zerovalent iron (n-mZVI). Batch experiments were performed to
investigate the influence of As (III), nZVI and mZVI concentration, pH
of solution and reaction time on the efficiency of As (III) removal by
Fe0 particles. Nano ZVI was synthesized by reduction of ferric chloride
by sodium borohydrid. Scanning Electron microscope and X-Ray
diffraction were used to determine particle size and characterization
of produced nanoparticles. Results showed up to 99.9% removal
efficiency for arsenic (III) that was obtained by nZVI dosage of 1 g/L
at equal time of 10 min and pH=7. The maximum removal efficiency by
mZVI obtained in initial arsenic concentration of 1 mg/L and mZVI
dosage of 10 g/L after 120 min. and pH=7. It could be concluded that
the removal efficiency was enhanced with increasing n-mZVI dosage and
reaction time, but decreased with increasing of arsenic concentration
and pH for both nano and micro sized ZVI. Nano ZVI presented an
outstanding ability to remove As (III) due to not only a high surface
area and low particle size but also to high inherent activity. |
---|---|
ISSN: | 1735-1979 1735-2746 |