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  • 1 Anhui Science and Technology University; Institute of Plasma Physics, Chinese Academy of Science Fenyang, 233100, Anhui, P.R. China; P.O. Box 1126, Hefei, 230031, P.R. China
  • 2 Anhui Science and Technology University; Institute of Plasma Physics, Chinese Academy of Science Fenyang, 233100, Anhui, P.R. China; P.O. Box 1126, Hefei, 230031, P.R. China
  • 3 Anhui Science and Technology University; Institute of Plasma Physics, Chinese Academy of Science Fenyang, 233100, Anhui, P.R. China; P.O. Box 1126, Hefei, 230031, P.R. China
  • 4 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 5 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 6 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 7 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 8 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 9 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 10 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 11 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
  • 12 Institute of Plasma Physics, Chinese Academy of Science P.O. Box 1126, Hefei, 230031, P.R. China
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Summary  

The sorption and desorption of radionuclide 90Sr2+were investigated on untreated calcareous soil and two treated soils to remove organic matter and calcium carbonate using batch technique. The experiments were carried out at ambient condition, pH 7.8±0.1 and in the presence of 0.001M NaCl. Effects of fulvic acid and ionic strength on the sorption of 90Sr2+on calcareous soil were also studied. It was found that the sorption isotherms are linear in the strontium concentration range used herein, and the sorption of 90Sr2+on the calcareous soil can be described as a reversible sorption process and the sorption mechanism is mainly ion-exchange. The sorption is dependent on ionic strength, and fulvic acid enhances the sorption of 90Sr2+on calcareous soil. Organic matter present in the calcareous soil is a significant trap of 90Sr2+and is responsible for the sorption.