the present invention provides a process for separating iodine from a nacl brine , comprising the following steps : providing said nacl brine containing iodide , adjusting the ph of said nacl brine to be no greater than 1 . 5 , adding oxidizing agent , such as chlorine containing oxidizing agent , to said nacl brine resulting from step to obtain an oxidation - reduction potential in said nacl brine of from 560 mv to 925 mv , the combination of said ph of no greater than 1 . 5 and oxidation - reduction potential of 560 mv to 925 mv resulting in the formation of an iodine - chlorine anionic complex , and contacting nonionic adsorption resin and said nacl brine from step one with the other to adsorb said iodine from this brine , to obtain as a result thereof nacl brine wherein the iodine content therein is preferably no greater than 100 ppbw , more preferably no greater than 10 ppbw .