AOPs Au nanoparticles Chemical engineering China CuFeS2 Fe-catalyst Fenton-like reaction Mn-Zr solid solution Technology: general issues VOC VOCs ZnO active oxygen advanced oxidation processes air purification alkali-activated material bimetallic catalysts bisphenol A blast furnace slag bleaching catalytic combustion catalytic wet peroxide oxidation ceria ciprofloxacin co-precipitation combustion degradation doping elimination technology environmental water samples