Control of Hg0 re-emission from gypsum slurries by means of additives in typical wet scrubber conditions

► Use of additives for avoiding mercury reemission by wet-FGD. ► Fenton reagents prevent the reduction of oxidized mercury species. ► Thiosulfate favors the formation of insoluble HgS. ► NaHS prevent the reduction of oxidized mercury species. ► TMT was found to be most effective additive for Hg2+ capture.