simultaneous photocatalytic reduction of ni(ii) and oxidation of naphthalene in aqueous solutions: a kinetic study and energy consumption

the individual and simultaneous photocatalytic reduction of poisonous ni(ii) ion, coupled with photooxidation of the pollutant naphthalene (na), were examined with trace amounts of commercial titania nanoparticles. a direct imposed irradiation photo-reactor was employed. the effect of major operational parameters, solution ph and temperature was investigated. the co-presence of naphthalene and ni(ii) ion gives a better separation of charge carriers, resulting enhancement in the both naphthalene oxidation and nickel ion reduction. pseudo first order reactions are proceeding. as a relevant criterion, the electrical energy consumption and other criteria were evaluated and were compared with other previously reported processes.