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A set of simulation equipment is set up after the conditions of removing SO2 and heavy metal Hg (Hg 0 and Hg 2+ ) has been investigated, the results of the removal technology method of absorption Hg 0 , Hg 2+ in smelting gases containing SO2 with (NH4)2S is tested, and their composition of reaction products and sediment are analyzed with XRD and XPS. Obta ined that: when absorption concentration of (NH4)2S are 0.8 mol/L, in pH 7.0-3.0 removal efficiency of Hg 0 and SO2 is higher, temperature will affect the absorption of Hg 0 , when reaction temperature is 30˚C the absorption of Hg 0 can be achieved the best. Under these optimum conditions, the removal e fficiency of Hg 0, Hg 2+ and SO2 could reach 89.45%, 99.42% and over 99.99%, the participation of SO2 has a promote consequence on removal of Hg 0 . The main reaction product is HgS, HgSO4,

Removal of elemental mercury and divalent mercury with ammonium sulfide in smelting gas containing SO2