Retention of 65Zn by Columbia River sediment


  • Vernon Johnson,

  • Norman Cutshall,

  • Charles Osterberg


Less 65Zn is displaced from Columbia River sediments by the interaction of sea water than can be removed by leaching with solutions of certain first transition series metals. We interpret this to mean that ion exchange is not an important mechanism in the retention of 65Zn in these samples. Instead, much of the 65Zn is held by ‘specific sorption.’ Neither treatment displaced 51Cr or 46Sc from the sediments, whereas about one-third of the 54Mn was removed upon contact with sea water.