Hsu C.-JAtkinson J.DChung AHsi H.-C.HSING-CHENG HSI2022-03-222022-03-22202103043894https://www.scopus.com/inward/record.uri?eid=2-s2.0-85109738415&doi=10.1016%2fj.jhazmat.2021.126546&partnerID=40&md5=7b7563ba8c6b2fe7864954501d73312chttps://scholars.lib.ntu.edu.tw/handle/123456789/598585Wet flue gas desulfurization (WFGD) simultaneously removes Hg and SO2 from coal-fired power plant flue gas streams. Hg0 re-emission occurs when the dissolved Hg(II) is converted to a volatile form (i.e., Hg0) that can be subsequently emitted into the ambient air from WFGD wastewater aeration basins. Others have shown that Hg0 re-emission depends on pH, temperature, ligands (Cl, Br, I, F, SO32-, SO42-, NO3-, SCN-, and ClO-), O2, minerals (Se and As), and metals (Fe and Cu) in WFGD wastewater. Still others have shown Hg0 re-emission restriction via inhibitor addition (adsorbents and precipitators). This is the first review that summarizes the complex and inconsistently reported Hg0 re-emission mechanisms, updates misconceptions related to Hg(II) complexation and reduction, and reviews applications of inhibitors that convert aqueous Hg(II) into stable solid forms to prevent gaseous Hg0 formation and release. ? 2021 Elsevier B.V.Coal-fired power plantFlue gas desulfurizationMercuryRe-emissionCoal fueled furnacesDesulfurizationFlue gasesFluesFossil fuel power plantsGas plantsMercury (metal)Mercury compoundsMiningAeration basinsFlue gas desulphurizationGas streamsGaseous mercurySO$-2$Wastewater aerationWet flue gas desulfurizationCoalactivated carbonarsenicbariumcarbon nanotubecopperferrous gluconateironmercurymetalmineralnitratenitric oxideoxygenselenium oxidesodium sulfidesulfur trioxideunclassified drugcoalaerationcoal-fired power plantemissiongasliterature reviewmercury (element)wastewater treatmentambient airchemical reactioncomplex formationcrystal structuredesulfurizationelectric power plantexhaust gasflue gashumanpHReviewtemperaturewaste water managementwastewaterwet flue gas desulfurizationair pollutantAir PollutantsGasesPower PlantsWaste Waterreview10.1016/j.jhazmat.2021.126546342526712-s2.0-85109738415