title: Activation of persulfate by Fe(III) species: Implications for 4-tert-butylphenol degradation.
abstract: In this study, the activation of persulfate induced by Fe(III) species, including 5 kinds of iron oxhydroxides (IOs) and dissolved Fe3+under dark condition were investigated. Ferrihydrite (FH) and akaganeite (AK) showed the highest activity in 4-tert-butylphenol (4tBP) removal. The 4tBP degradation rate constant decreased as the solution pH increased from pH 3.2 to 7.8 in FH/S2O82-system. However, the pH value had no significant effect on the 4tBP degradation in AK/S2O82-system. The degradation of 4tBP in Fe3+/S2O82-system was also performed to investigate the role of ferric species in persulfate activation. The pH dependency of 4tBP degradation rate was closely related to the speciation of FeIII, whereas the Fe(H2O)63+was found to be the most active soluble iron complex form in the activation of S2O82-. 4tBP degradation was mainly due to the SO4-in IOs/S2O82-system, while SO4-and HO2both had great contribution on 4tBP degradation in Fe3+/S2O82-system. Further investigations showed clearly that 4tBP degradation efficiency was decreased significantly due to the trapping of SO4-by chloride. This finding may have promising implications in developing a new technology for the treatment of contaminated waters and soils, especially where Fe3+species are naturally occurring.
authors: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France; Ecole Nationale Supérieure de Chimie de Rennes UMR CNRS 6226, 11 Allée de Beaulieu, CS 50837, F-35708 RENNES Cedex 7, France; State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
authors: Yanlin
authors: Y
authors: Wu
authors: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors: Romain
authors: R
authors: Prulho
authors: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France. Electronic address: marcello.brigante@univ-bpclermont.fr.
authors: Marcello
authors: M
authors: Brigante
authors: Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China.
authors: Wenbo
authors: W
authors: Dong
authors: Ecole Nationale Supérieure de Chimie de Rennes UMR CNRS 6226, 11 Allée de Beaulieu, CS 50837, F-35708 RENNES Cedex 7, France. Electronic address: khalil.hanna@ensc-rennes.fr.
authors: Khalil
authors: K
authors: Hanna
authors: Université Clermont Auvergne, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, F-63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, F-63171 Aubière, France.
authors: Gilles
authors: G
authors: Mailhot
keywords: Advanced oxidation processes; Persulfate activation; Radical species; Sulfate radical