Abstract
In this study, we investigated the behavior and emission characteristics of Hg across diverse industrial combustion sources, such as coal-fired power plants, solid refuse fuel (SRF) power plants, medical waste incinerators, and industrial waste incinerators, as well as the development of emission factors, Among the facilities, the estimated Hg control efficiency was 86% for coal-fired power plants, 69% for SRF power plants, and over 95% for medical and industrial waste incinerators. The oxidation and regulation of elemental Hg (Hg0) are considered important factors in reducing Hg air emissions, with the flue gas HCl concentration being the primary factor affecting Hg oxidation. Particulate Hg was mainly controlled in the electrostatic precipitator (ESP) at the power plant, effectively capturing dust particles ranging from 10 to 100 μm. The emission factors estimated by measuring stack flue gas exhibited their highest values at SRF power plants, with an estimated average of 127±25 mg/ton, while the lowest values were observed for industrial waste incinerators, with an average of 2.5±0.3 mg/ton. This study is significant in that it provides a comparative analysis of various real industrial cases, and the Hg emission factors are expected to offer valuable data for estimating future national Hg air emissions.
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