Calcium isotopic fractionation during adsorption onto and desorption from soil phyllosilicates (kaolinite, montmorillonite and muscovite)
作者: Jean-Michel BrazierAnne-Désirée SchmittSophie GangloffEric PeltFrançois ChabauxEmmanuel Tertre
作者单位: 1Université de Strasbourg, CNRS, ENGEES, LHyGeS UMR 7517, 1 rue Blessig, F-67000 Strasbourg, France
2Universite de Poitiers/CNRS, UMR 7285 IC2MP, Equipe HydrASA, Bat. B8 rue Albert Turpain, TSA 51106, 86073 Poitiers CEDEX 9, France
刊名: Geochimica et Cosmochimica Acta, 2019, Vol.250 , pp.324-347
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2019.02.017
关键词: Ca isotopesAdsorption/desorptionClay mineralsLayer chargeInterlayer spaceSpecific surface areaKinetic and thermodynamic isotopic fractionation
英文摘要: Abstract(#br)Mineral soil constituents play an important role in the storage/release of nutrients due to their ability to adsorb and desorb cations. Phyllosilicate minerals are particularly reactive due to their small size and high specific surface area (up to ∼800 m 2 ·g −1 ). Previous work has highlighted the potential of Ca isotopes (δ 44/40 Ca) to identify secondary processes occurring within soils. Nevertheless, the mechanisms of isotopic fractionation (amplitude and nature) associated with Ca adsorption onto and desorption from different phyllosilicate minerals that are commonly found in soil remain poorly understood. This step is fundamental to improve our understanding of the Ca biogeochemical cycle at the water-soil-plant interface. Consequently, the study of the possible Ca...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)

  • isotopic 同位素置换
  • muscovite 白云母
  • fractionation 分级
  • kaolinite 高岭石
  • desorption 解吸
  • minerals 矿物
  • Adsorption 吸附
  • adsorption 吸附
  • thermodynamic 热力学的
  • during 在的期间