Abstract
Photocatalysis is an effective technology for the removal of organic pollutants from wastewater. Artificial light sources are still required for continuous operation, representing a large fraction of the operating costs. Thus, energy efficiency becomes a key issue that needs optimization. In this work, the performance of a novel upgraded Light Emitting Diodes (LED) reactor was studied varying the radiation applied. The evaluation 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 480min, was attained using 27.5mWcm−2. Nevertheless, the best energy consumption was for 3.22mWcm−2, with an EEO of 47.5kWhm−3order−1. Moreover, the hydroxyl radicals (OH) generated were quantified and a three-region kinetic model considering radiation 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 last one showed the highest performance, achieving complete SDBS removal after 360min; however, its energy requirement was one order of magnitude higher than that of the upgraded LED reactor.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
