Wet air oxidation and ultrasound for the removal of linear alkylbenzene sulfonates from wastewater:the beneficial role of catalysis

摘要

The wet air oxidation(WAO) and ultrasound irradiation of sodium dodecylbenzene sulfonate in water was investigated.Heterogeneous catalysts such as a mixed copper-zinc oxide and noble metals,namely platinum,palladium and ruthenium,generally improved the efficiency of the respective uncatalysed process.The performance of sonochemical treatment,although less effective than WAO at high organic concentrations,may improve by a Fenton-like reaction mechanism on the addition of ferrous ions.