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Sara Dominguez,Maria J. Rivero,Pedro Gomez,Raquel Iban˜ez,Inmaculada Ortiz 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
Photocatalysis is an effective technology for the removal of organic pollutants from wastewater. Artificiallight sources are still required for continuous operation, representing a large fraction of the operatingcosts. Thus, energy efficiency becomes a key issue that needs optimization. In this work, the performanceof a novel upgraded Light Emitting Diodes (LED) reactor was studied varying the radiation applied. Theevaluation was based on the degradation yield of the surfactant sodium dodecylbenzenesulfonate(SDBS) and on the energy requirement, determined by the parameter ‘‘Electrical Energy per Order’’ (EEO). The best SDBS removal, 94% after 480 min, was attained using 27.5 mW cm 2. Nevertheless, the bestenergy consumption was for 3.22 mW cm 2, with an EEO of 47.5 kW h m 3 order 1. Moreover, thehydroxyl radicals ( OH) generated were quantified and a three-region kinetic model consideringradiation was proposed. 92% of the simulated results fell within [ OH]gen,exp 15% [ OH]gen,exp. Furthermore, a comparison with a 1st generation LED reactor and a Hg lamp reactor was carried out. The lastone showed the highest performance, achieving complete SDBS removal after 360 min; however, its energyrequirement was one order of magnitude higher than that of the upgraded LED reactor.