Effect of additives on Hg2+ reduction and precipitation inhibited by sodium dithiocarbamate in simulated flue gas desulfurization solutions

► DTCR was utilized as a precipitator to control Hg2+ reduction and Hg0 re-emission in FGD solutions. ► Hg2+ reduction efficiency decreased dramatically with the increase of DTCR dosage. ► Initial pH value, temperature, Cl−, SO42−, NO3− and metal ions would affect the Hg2+ reduction and precipitation reactions. ► The reaction mechanism has been discussed and clearly presented in each part.