Removal of gaseous elemental mercury by dielectric barrier discharge

Abstract

The removal of elemental mercury (Hg-0) with the reactive species produced from dielectric barrier discharge (DBD) was studied. The effects of the operating parameters, such as the applied voltage, residence time, initial concentration and co-existence of other pollutants, were investigated. The removal of Hg-0 was significantly promoted by an increase in the applied voltage of the DBD reactor system. The presence of NO gas decreased the Hg-0 removal efficiency within the range of input powers tested compared to the case of Hg-0-only due to the competition for ozone between Hg-0 and NO gas in the DBD reactor. (C) 2007 Elsevier Ltd. All rights reserved.