简介：Inthiswork,aplasma-solutionsystemwasappliedtothedegradationofAcidOrange7(A07).Theeffectsofinitialconcentrationandtypeoffeedgases(air,oxygen,nitrogenorargon)werestudied.Astheinitialconcentrationincreasedfrom100mg/Lto160mg/L,thediscolourationrateofA07decreasedfrom99.3%to95.9%,whereastheCODremovalratedecreasedfrom37.9%to22.6%.AirprovidedthebestdiscolourationandCODremovalrates(99.3%and37.9%,respectively).Inthepresenceofazero-valentiron(ZVI)catalyst,theA07CODremovalrateincreasedto76.4%.ThedegradationproductswereanalysedbyaGC-MS,revealingthatthedegradationofthedyemoleculewasinitiatedthroughthecleavageofthe-N=N-bondbeforefinallybeingconvertedtoorganicacids.