The sorption of alkaline earth metals on biotite
作者: Mervi SöderlundHeini ErvanneEveliina MuuriJukka Lehto
作者单位: 1Department of Chemistry – Radiochemistry, P.O. Box 55, FI-00014 University of Helsinki
刊名: GEOCHEMICAL JOURNAL, 2019, Vol.53 (4), pp.223-234
来源数据库: J-STAGE Journals
DOI: 10.2343/geochemj.2.0561
关键词: Alkaline earth cationsSorptionSorption modellingCation exchangeBiotite
原始语种摘要: The sorption of alkaline earth cations Ca2+, Sr2+, Ba2+, and Ra2+ was investigated on Na-converted biotite, the main sorbing mineral in granitic bedrock at the nuclear waste disposal site in Olkiluoto, Finland. Batch sorption experiments were conducted under CO2-free conditions by varying the concentration of the alkaline earth cation (Ca2+, Sr2+ and Ba2+ 10−8 M–10−2 M; Ra2+ 10−10 M–10−7 M) in 0.01 M, 0.1 M and 1.0 M NaClO4 solutions buffered to pH 8. Additional experiments were conducted on four Olkiluoto bedrock reference groundwater solutions. The retention of alkaline earth cations on biotite decreased upon their increasing concentration in the liquid phase and on increasing NaClO4 solution concentration. The Kd values in NaClO4 solutions and in glacial melt water (ionic strength 0.12...
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  • sorption 吸着
  • earth 地球
  • biotite 黑云母
  • alkaline 碱的
  • groundwater 潜水
  • values 价值观
  • reference 基准电压源
  • fresh 新鲜的
  • brackish 碱化的
  • concentration 浓度