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@ARTICLE{Lange:877445,
      author       = {Lange, Steve and Klinkenberg, Martina and Barthel, Juri and
                      Bosbach, Dirk and Deissmann, Guido},
      title        = {{U}ptake and retention of molybdenum in cementitious
                      systems},
      journal      = {Applied geochemistry},
      volume       = {119},
      issn         = {0883-2927},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2020-02198},
      pages        = {104630},
      year         = {2020},
      abstract     = {The uptake of molybdenum, present in aqueous cementitious
                      environments in the form of the molybdate ion (MoO42-), by
                      various cement hydration phases such as
                      calcium-silicate-hydrates (C–S–H), monosulphate (AFm),
                      ettringite (AFt), as well as hardened cement paste made from
                      Ordinary Portland cement (OPC), was studied in batch-type
                      sorption experiments under anoxic conditions. Uptake
                      kinetics were generally fast, leading to sorption
                      equilibrium in less than 30 days. In particular, a strong
                      uptake of molybdate by AFm phases was observed as well as a
                      distinct contribution of C–S–H phases to the molybdate
                      retention in cementitious systems, the latter depending on
                      the Ca/Si-ratio of the C–S–H and the alkali content in
                      solution. In systems containing hydrogarnet, the
                      neo-formation of a molybdate-bearing AFm phase was
                      identified as an additional process contributing to
                      molybdate retention. The findings have implications for
                      selecting grouts for the immobilisation of radioactive waste
                      streams containing Mo-93 and also enhance the data available
                      on molybdate sorption and retention in cementitious
                      systems.},
      cin          = {IEK-6 / ER-C-2},
      ddc          = {550},
      cid          = {I:(DE-Juel1)IEK-6-20101013 / I:(DE-Juel1)ER-C-2-20170209},
      pnm          = {161 - Nuclear Waste Management (POF3-161) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-161 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000556136100008},
      doi          = {10.1016/j.apgeochem.2020.104630},
      url          = {https://juser.fz-juelich.de/record/877445},
}