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