A series of ternary Ag/Agl-Ag2CO3 photocatalysts synthesized using a facile coprecipitation method were employed to investigate their performances of Hg-0 removal in a wet scrubbing reactor. The hybrids were characterized by N-2 adsorption-desorption, XRD, SEM-EDS, HRTEM, XPS, DRS and ESR. The photocatalytic activities of Hg-0 removal were evaluated under fluorescent light. The results showed that AgI content, fluorescent light irradiation, reaction temperature all showed significant influences on Hg-0 removal. NO exhibited significant effect on Hg-0 removal in comparison to SO2. Among these ternary Ag/Agl-Ag2CO3 hybrids, Ag/Agl(0.1)-Ag2CO3 showed the highest Hg-0 removal efficiency, which could be ascribed to the effective separation of photogenerated electron-hole pairs between AgI and Ag2CO3 and the surface plasmon resonance (SPR) effect in the visible region by metallic silver nanoparticles (Ag-0 NPs). The trapping studies of reactive radicals showed that the superoxide radicals (O-center dot(2)-) may play a key role in Hg-0 removal under fluorescent light. According to the experimental and characterization results, a possible photocatalytic oxidation mechanism for enhanced Hg-0 removal over Ag/AgI(0.1)-Ag2CO3 hybrid under fluorescent light was proposed. (C) 2016 Elsevier B.V. All rights reserved.