“…4.2 mg Hg/MMBtu compared to 3.7 mg Hg/MMBtu for Powder River Basin coals [34]. Stricker and Ellis (1999) reported that Hg, As, Se, Cd and Pb concentrations (conducted on whole coal and moisture basis) of lignites from the Beulah Zap coalfield were 0.14 ppm, 9.1 ppm, 0.74 ppm, 0.086 ppm and 3.5 ppm respectively [35].…”