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        Study of degrading a tributyl phosphate solution via a plasma-based advanced oxidation process using a submerged multi-hole dielectric barrier discharge

        Korea Institute of Radiological and Medical Sciences,Park Chawon,Min Sun-Hong,Kim Minho,Hong Bong Hwan 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.81 No.3

        Uses of tributyl phosphate (TBP) vary from nuclear fuel reprocessing to being an antifoaming agent. As TBP causes environmental pollution, environmentally friendly degradation methods are required. Non-thermal plasma-based advanced oxidation process (AOP) is suitable, because it is easy to operate. Herein, a plasma-based AOP was stably generated, using submerged multi-hole dielectric barrier discharge (DBD), and applied to a concentrated TBP solution. A submerged DBD plasma system was designed to interact directly with water, thereby producing reactive oxygen species and functioning as a powerful oxidizer. Additionally, UV, O3, and H2O2 were generated by the developed plasma system without using any other additives to produce OH radicals to degrade organic pollutants, thereby circumventing the use of complex and advanced oxidation processes. Electrical properties and concentrations of the active species were analyzed to establish optimal plasma operating conditions for degrading the TBP solution. Total organic carbon (TOC) and changes in solution properties were measured for analysis. After 50 min of plasma treatment, the TOC concentration decreased gradually. Accordingly, a degradation mechanism for the TBP solution was proposed. Plasma-based AOP using underwater multi-hole DBD has advantages as an alternative technology for degrading organic pollutants such as TBP solutions

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