The invention allows for the repeated treatment of a gas stream to reduce the level of mercury and other pollutants through reduction steps, allowing {HEAD ~ targeted treatment} of {TAIL ~ specific compounds} 
The invention allows for the repeated treatment of a gas stream to reduce the level of mercury and other pollutants through reduction steps , allowing { HEAD ~ targeted treatment } of { TAIL ~ specific compounds }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL