as a type of Fenton-like heterogeneous catalyst made by alkaline precipitation methods
was evaluated with degrading tetracycline hydrochloride (TH) in wastewater and reaction condition including catalyst loading
pH and hydrogen peroxide dosage examined. The results show that the degradation rate of tetracycline hydrochloride can reach up to 90% and the reaction rate 0.0504 min-1 at catalyst loading 3.0 g·L-1
H2O2 dosage 9.9 mmol·L-1
pH 3 and temperature (25±1)℃. A comparison with FeOOH catalyst indicates that Fenton-like Si-FeOOH is better than FeOOH. Various contaminants and probe compounds (n-butanol
benzoquinone) were used to identify the active species involved in the catalytic system. The results revealed that the hydroxyl radicals (·OH) and superoxide radical (HO2·) may be responsible for the degradation of tetracycline hydrochloride (TH). The possible catalytic oxidation mechanism was also discussed. The use of Si-FeOOH /H2O2 system may be a feasible approach for the elimination of widely existing pollutants.