Optimization of the solution parameters during the degradation of Orange II in a photo-reactor mediated by Fe-Nafion membranes.
The Fenton and photo-Fenton mediated degradation process of Orange II was investigated in a flow photo-reactor. The degradation was monitored as a function of the wavelength of the applied light, recirculation flow rate, amount of H(2)O(2) and the initial concentration of Orange II. Optimization of the photo-Fenton degradation mediated by Fe-Nafion membranes indicated that an Orange II (0.25 M) solution discolored above 95% within 2.5 hours at an H(2)O(2)/Orange II ratio of 20. A concomitant mineralization of 40% of Orange II was observed after 5 h reaction. Homogeneous photo-Fenton processes were able to fully discolore Orange II within 1 hour and concomitantly fully mineralize the dye in the presence of Fe(III) (2 ppm) and an H(2)O(2)/Orange II ratio of 20. Surfactants such as linear alkylbenzene sulphonates (LAS) and K-perfluoroalkyl sulphonate (FT 800) slowed down the Orange II abatement in photo-Fenton processes.
Manzano
M A
MA
Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, Cadiz University, Poligono Rio San Pedro s/n, Puerto Real, 11510, Cadiz, Spain. manuel.manzano@uca.es
Riaza
A
A
Quiroga
J M
JM
Kiwi
J
J
D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002384:Catalysis; D003116:Color; D005465:Fluorocarbon Polymers / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008027:Light; D008567:Membranes, Artificial; D008903:Minerals / Q000737:chemistry; D012996:Solutions; D013501:Surface-Active Agents / Q000737:chemistry; D013997:Time Factors
D001391:Azo Compounds; D001557:Benzenesulfonates; C045076:Fenton's reagent; D005465:Fluorocarbon Polymers; D008567:Membranes, Artificial; D008903:Minerals; D012996:Solutions; D013501:Surface-Active Agents; C040402:perfluorosulfonic acid; D006861:Hydrogen Peroxide; D007501:Iron; C014722:2-naphthol orange