Accession Number : ADA616150


Title :   The Use of Ultra-Violet (UV) Light Emitting Diodes (LEDS) in an Advanced Oxidation Process (AOP) with Brilliant Blue FCF as an Indicator


Descriptive Note : Master's thesis


Corporate Author : AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT


Personal Author(s) : Scott, IV, Robert W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a616150.pdf


Report Date : 26 Mar 2015


Pagination or Media Count : 80


Abstract : Water contamination can result from terrorist acts, industrial accidents, or natural phenomena. Advanced Oxidation Processes (AOPs) represent a potentially useful method for water decontamination. This research explored the application of Brilliant Blue FCF as a witness dye in an Advanced Oxidation Process (AOP) employing Ultra-Violet (UV) Light Emitting Diodes (LEDs) with peroxide (H2O2). In addition to exploring the attributes of Brilliant Blue FCF within this application, this research employed this dye to evaluate the effect of varied UV LED duty cycles (pulsing) on the reaction rates of a UV/H2O2 AOP. Experiments performed using Brilliant Blue FCF indicated that it performed suitably as a witness dye with improved characteristics as compared to methylene blue. Further, the experiments indicated that when the LEDs were driven at lower duty cycles (e.g., 10 and 5%) they were 165% to 200% more efficient at driving the UV/H2O2 AOP than they were when driven continuously (e.g., a duty cycle of 100%).


Descriptors :   *LIGHT EMITTING DIODES , BLUE(COLOR) , DECONTAMINATION , DYES , INDICATORS , OXIDATION , PEROXIDES , THESES , ULTRAVIOLET RADIATION , WATER TREATMENT


Subject Categories : Electrooptical and Optoelectronic Devices


Distribution Statement : APPROVED FOR PUBLIC RELEASE