Decomposition of Methylene Blue in Water Using Mist Flow Plasma Reactor
T. Shibata1 and H. Nishiyama2
1Graduate School of Engineering, Tohoku University, Japan
2Institute of Fluid Science, Tohoku University, Japan
Abstract— The world is faced with serious problems of water pollution. Recently, conventional chemical treatment has been replaced by a water treatment system using plasma. In this study, using a newly developed mist-flow plasma reactor, a method for decomposing methylene blue by directly spraying solution as mist into reactive plasma was investigated. Reactive plasma is generated by dielectric barrier discharge (DBD) on the inner wall of a tube. An atomized solution containing micro-sized droplets was introduced into the mist-flow plasma reactor and treated by ozone, free radicals and ultraviolet rays. Dissolved chemical species such as H2O2, reactive oxidation species and O3 as well as NO3-, pH, and conductivities are measured as liquid properties. In addition, the decomposition characteristics of this method were experimentally clarified through decolorization experiments of methylene blue solution.
Keywords— Water purification, plasma, mist flow, functional fluid