Seite - 151 - in Advanced Chemical Kinetics

0.5MZnO-FA-Sepshowsthebestactivitywiththe lowestMOremainingpercentages(15%for decolorizationand12%fordegradation) in less than10min.RapidphotodegradationofMOis facilitated,due to thesynergistic effectof: (1) itsadsorptiononthemixedstructuresofFAand Sep,and(2) itsphotodegradationby theZnOnanoparticles. Dark adsorption capacity of 0.5MZnO-FA-Sep catalyst is also investigated by varying the initialMOconcentrations from3.27 to 32.7mgL 1 (Figure 2C andD). It is evident that the amount of adsorbed MO at low initial concentrations is smaller than the corresponding amount at higher initial values, whileMO removal percentages decrease significantly with increasing initialMOconcentration. ThehighestMOremainingpercentages arenoticedwith 32.7mgL 1MOconcentration as 73.2 and71.2%after 120min fordecolorization anddegra- dation processes, respectively. The removal rate of MO is fast up to 30–40 min, and then Figure 2. (A) Photolysis ofMOanddark adsorption experiments of FA-Sepand supported catalysts, (B) photocatalytic activitiesof thesupportedcatalysts, (C)MOremainingpercentages fordecolorizationand(D)MOremainingpercentages fordegradation. Adsorption, Kinetics and Photoactivity of ZnO-Supported Fly Ash-Sepiolite Ternary Catalyst http://dx.doi.org/10.5772/intechopen.70504 151