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Determination
of Particulate and Gaseous Mercury Emissions from Sewage Sludge Incinerators
– USEPA Method 101A USEPA Method 101A is used for the determination of mercury (Hg) emissions from sewage sludge incinerators and other sources as specified in an applicable subpart of the regulations. Particulate and gaseous Hg emissions are withdrawn isokinetically from the source and are collected in acidic potassium permanganate (KMnO4) solution. The Hg collected (in the mercuric form) is reduced to elemental Hg, which is then aerated from the solution into an optical cell and measured by cold vapor atomic absorption spectrophotometry. Excessive oxidizable organic matter in the stack gas prematurely depletes the KMnO4 solution and thereby prevents further collection of Hg. |
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