Radium-226 and Alkaline Earth Elements in the Water Column, Interstitial Sediment Water, and Sediments of Zurichsee (Switzerland)

摘要

Distribution of alkaline earth elements Mg, Ca, Sr, Ba, and Ra (~226Ra) was measured in the water column and in the sediments (solids and interstitial water) of Zurichsee (Lake Zurich), Switzer- land. With the exception of Ra, the concentrations of alkaline earth elements were always quite uniformly distributed throughout the water column and did not show seasonal variations. Our results in- dicate removal of Ra from the water column in winter, probably due to scavenging effects during the turnover period of the lake.