Steam plasma jet for treatment of contaminated water with high-concentration 1,4-dioxane organic pollutants

摘要

A steam plasma jet (SPJ) by using both water and 1,4-dioxane aqueous solution (DAS) as working medium was injected into contaminated water to decompose 1,4-dioxane. The optical emission spectroscopy analysis showed that the formation of the excited species CH~* and C_2 ~* depended on the concentration of 1,4-dioxane. The influences of SPJ gas temperatures for different working mediums were discussed. The 1,4-dioxane decomposition was enhanced when DAS was used as working medium and SPJ was injected into DAS. Synthesis gas (a mixture of H_2 and CO) and CO_2 were the main products in gaseous effluents.