Radium in the Suwannee River and estuary |
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Authors: | William C Burnett James B Cowart Suchint Deetae |
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Institution: | (1) Dept. of Oceanography, Florida State University, Tallahassee, FL 32306, USA;(2) Dept. of Geology, Florida State University, Tallahassee, FL, 32306, U.S.A.;(3) Dept. of Marine Science, Faculty of Fisheries, Kasetsart University, Bangkok, Thailand |
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Abstract: | A two-year study of radium in the Suwannee River has shown that groundwater discharge, via springs, is a very important source
of radium both to the river and to offshore Gulf of Mexico waters. Dissolved radium is maintained within relatively narrow
limits in the river by uptake into suspended particles. In the estuary, dissolved radium versus salinity profiles show distinctive
nonconservative behavior with radium in significant excess of its linear mixing value at mid-salinities. Unlike the situation
in many other estuaries, however, desorption of radium from particles cannot account for most of the observed excess. Thus,
the anomalously high radium characteristic of much of the west Florida shelf apparently does not have a riverine source. Direct
effusion of high-radium groundwater into these coastal waters is thought to be the major supplier of radium, and perhaps other
elements as well. |
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Keywords: | radium Suwannee River Gulf of Mexico submarine springs isotopes Florida |
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