Issues associated with the use of activated carbon for mercury control in cement kilns

Measuring Gas Phase Mercury Emissions from Industrial Effluents

“…A better understanding of the Hg cycle in individual parts of the process, especially in the coal mill, the pre-heater (cyclones), the cooling tower and filters would also promote better design of Hg control technologies as well as increase production yields [56]. Such improvements are especially encouraged by the National Emission Standards for Hazardous Air Pollutants (NESHAP) implemented by US-EPA in 2010 to regulate Hg emissions from cement-manufacturing industries [59][60][61]. The standard requires the installation of Hg emissions control technology on ~163 kilns in 35 states, requiring each kiln to control its Hg emission concentration to less than 12 µg/m 3 for existing facilities and 4 µg/m 3 for new facilities [13].…”