Phenol degradation by Fenton-like process.
The main objective of this study was to investigate the optimum conditions for the Fenton-like process on phenol degradation, using Mn(2+) as a supporting catalyst in the Fenton reaction. The effect of the independent factors [H2O2], [Fe(2+)], [Mn(2+)] and t (reaction time) was evaluated on the efficiency of phenol degradation at two pHs (3 and 5). The experimental arrangement adopted was the Box-Behnken delineation, with the phenol concentration after the treatments suggested as response variable. At less acidic pH (5), regardless of [Mn(2+)], it was observed that the conventional Fenton process was the most efficient alternative, considering the optimum condition: 2.65 mmol L(-1) for [H2O2], 0.36 mmol L(-1) for [Fe(2+)], and 90 min for t. It was observed that the addition of Mn(2+) helped the phenol degradation at more acidic pH (3), obtaining the optimum condition: 6.17 mmol L(-1) for [H2O2], 0.36 mmol L(-1) for [Fe(2+)], 1.09 mmol L(-1) for [Mn(2+)], and 90 min for t.
Civil Engineering Department, Federal University of Goiás, Catalão, Brazil. antoverps@ufg.br.
Antover Panazzolo
AP
Sarmento
Agricultural Engineering Department, Federal University of Viçosa, Viçosa, Brazil.
Alisson Carraro
AC
Borges
Agricultural Engineering Department, Federal University of Viçosa, Viçosa, Brazil.
Antonio Teixeira
AT
de Matos
Chemistry Department, Federal University of Goiás, Catalão, Brazil.
Lincoln Lucílio
LL
Romualdo
D006861:Hydrogen Peroxide; D007501:Iron; D019800:Phenol / Q000032:analysis / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
D014874:Water Pollutants, Chemical; D019800:Phenol; D006861:Hydrogen Peroxide; D007501:Iron
Advanced oxidation process; Box-Behnken delineation; Degradation; Fenton reaction; Hydroxyl radicals; Manganese (II)