Study of the catalytic activity of multilayer graphene (MLG), molybdenum oxide (MoO2), and manganese ferrite (MnFe2O4) on the melanoidin removal by ozonation process

Melanoidin is a compound produced by food industries and distilleries, which has negative impacts on the water environment due to high content of dissolved organic carbon dark color. Consequently, this work aims study catalytic properties multilayer graphene (MLG), molybdenum oxide (MoO2), manganese ferrite (MnFe2O4) in ozonation process remove melanoidin from solution. The results show that reaction rate constant (k) decolorization using 1.7 times higher than non-catalytic process. same were observed for all materials with no significant difference among them. On other hand, MLG was most efficient catalyst removing total carbon. removal efficiency 32% 63% MLG. This increase attributed better production hydroxyl radicals presence MLG, confirmed isopropanol as radical scavenger. efficiencies MoO2 MnFe2O4 46% 51%, respectively. promising treatment removal.