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  4. Ferrate (Fe(VI)) Application for Municipal Wastewater Treatment: A Novel Process for Simultaneous Micropollutant Oxidation and Phosphate Removal
 
research article

Ferrate (Fe(VI)) Application for Municipal Wastewater Treatment: A Novel Process for Simultaneous Micropollutant Oxidation and Phosphate Removal

Lee, Yunho
•
Zimmermann, Saskia Gisela  
•
Kieu, Anh Trung
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2009
Environmental Science & Technology

A novel technology for enhanced municipal wasterwater treatment was assessed based on the dual functions of Fe(VI) to oxidize micropollutants and remove phosphate by formation of ferric phosphates. Second-order rate constants (k) for the reactions of selected pharmaceuticals, endocrine disruptors, and organic model compounds with Fe(VI) were in the range of 1 (trimethylamine) to 9000 M-1 s(-1) (aniline) in the pH-range 7-8. The selected compounds contained electron-rich moieties (ERM) such as phenols, anilines, amines, and olefins. Oxidation experiments in wastewater spiked with micropollutants at concentrations in the low mu M range at pH 7 and 8 showed that Fe(VI) doses higher than 5 mg Fe L-1 are capable of eliminating various ERM-containing micropollutants by more than 85%. In comparison to ozone, Fe(VI) was. as effective or slightly less effective in terms of micropollutants oxidation, with Fe(VI) having the benefit of phosphate removal. To lower phosphate from 3.5 to 0.8 mg PO4-P L-1 (regulatory limit for wastewater discharge in Switzerland), a Fe(VI) dose of 7.5 mg Fe L-1 was needed. Overall, this study demonstrates Fe(VI) as a promising tool for an enhanced wastewater treatment to remove micropollutants as well as to control phosphate in a single treatment step.

  • Details
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Type
research article
DOI
10.1021/es803588k
Web of Science ID

WOS:000266046700068

Author(s)
Lee, Yunho
Zimmermann, Saskia Gisela  
Kieu, Anh Trung
von Gunten, Urs  
Date Issued

2009

Published in
Environmental Science & Technology
Volume

43

Start page

3831

End page

3838

Subjects

Aqueous Ozone

•

Endocrine Disruptors

•

Reaction-Kinetics

•

Pulse-Radiolysis

•

Stopped-Flow

•

Ozonation

•

Pharmaceuticals

•

(Feo42-)-O-Vi

•

Coagulation

•

Aniline

Editorial or Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
LTQE  
Available on Infoscience
July 1, 2011
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/69169
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