Removal methods include heating and rectification, {HEAD ~ absorption} using {TAIL ~ a water absorbent}, or a combination of these methods 
Removal methods include heating and rectification , { HEAD ~ absorption } using { TAIL ~ a water absorbent } , or a combination of these methods
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH