Orbital - Vol. 7 No. 3 - July-September 2015
FULL PAPERS

Fenton Coagulation/Oxidation Using Fe2+ and Fe3+ Íons and Peracetic Acid for the Treatment of Wastewater

Grasiele Soares Cavallini
Universidade Federal do Tocantins - UFT
Carlos Magno de Sousa Vidal
Universidade Estadual do Centro-Oeste - UNICENTRO
Jeanette Beber de Souza
Universidade Estadual do Centro-Oeste - UNICENTRO
Sandro Xavier de Campos
Universidade Estadual de Ponta Grossa - UEPG
Published September 21, 2015
Keywords
  • fenton coagulation/oxidation,
  • peracetic acids,
  • removing particulate matter,
  • disinfection
How to Cite
(1)
Cavallini, G. S.; Vidal, C. M. de S.; de Souza, J. B.; de Campos, S. X. Fenton Coagulation/Oxidation Using Fe2+ and Fe3+ Íons and Peracetic Acid for the Treatment of Wastewater. Orbital: Electron. J. Chem. 2015, 7, 253-263.

Abstract

The Fenton coagulation/oxidation process is divided into two steps: coagulation, in alkaline pH and oxidation, in acid pH. This configuration provides a reduction in oxidant concentration, due to the pretreatment conducted in the coagulation step. This study proposes the substitution of hydrogen peroxide (HP) by peracetic acid (PAA) in a Fenton coagulation process to treat sanitary sewage and provide its disinfection. The new combination is proposed in a single step and presented good results in removing turbidity (98.5%), apparent color (95.4%), phosphorus (100%) and COD (58.2%) even at the effluent natural pH, besides demonstrating higher reduction in E. coli when compared with the process that employs hydrogen peroxide. The formation of Fe3+ ions was shown to be responsible for the removal of the particulate material.

DOI: http://dx.doi.org/10.17807/orbital.v7i3.626