简介:Acoaxialinsulated-rod-to-cylinderunderwaterstreamerdischargesystemcapableofinjectingplasmaintoalargevolumeofwaterwasdevelopedandemployedtodecolorizeazodyesunsetyellow.Therodtypeanodewascoveredbyaninsulatortubewithawallthicknessof0.4mm.Aseriesofslitswithawidthof20μmto80μmandalengthofabout4mmwerecutontothewalloftheinsulatortube.Dependingonthesolutionconductivity,acylindricaldischargeregionwithalengthof60mmandawallthicknessof5mmto11mmformsinthereactor.Theinfluenceofthesolutionconductivity,pHandpulsefrequencyonthedecolorationofsunsetyellowwasinvestigated.Theresultsshowthatthesolutionconductivityhaslittleeffect,whilethesolutionpHandthepulsefrequencyhavesignificantinfluenceonthedecolorationrateofsunsetyellow.Thedecolorationrateofsunsetyellowisincreasedwiththeincreaseinpulsefrequency.AlowerpHinsolutionpromotesthedecolorationofsunsetyellowwhileahigherpHinhibitsit.