% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Mehmood:172147,
      author       = {Mehmood, Khalid and Hofmann, Diana and Burauel, Peter and
                      Vereecken, Harry and Berns, Anne E.},
      title        = {{C}esium and strontium sorption behavior in amended
                      agricultural soils},
      school       = {Rheinische Friedrich-Wilhelms-Universität Bonn},
      reportid     = {FZJ-2014-05658},
      year         = {2014},
      abstract     = {Biogas digestates and biochar are emerging soil amendments.
                      Biochar is a byproduct of pyrolysis process which is thermal
                      decomposition of biomass to produce syngas and bio-oil. The
                      use of biochar for soil amendment is being promoted for
                      higher crop yields and carbon sequestration. Currently, the
                      numbers of biogas plants in Germany are increasing to meet
                      the new energy scenarios. The sustainability of biogas
                      industry requires proper disposal options for digestate.
                      Biogas digestates being rich in nutrients are beneficial to
                      enhance agricultural productions. Contrary to the
                      agronomical benefits of these organic amendments, their use
                      can influence the mobility and bioavailability of soil
                      contaminants due to nutrients competition and high organic
                      matter content. So far, the impact of such amendments on
                      highly problematic contaminants like radionuclides is not
                      truly accounted for.In the present study,
                      sorption-desorption behavior of cesium and strontium was
                      investigated in three soils of different origin and texture.
                      Two agricultural soils, a loamy sand and a silty soil, were
                      amended with biochar and digestate in separate experiments,
                      with field application rates of 25 Mg/ha and 34 Mg/ha,
                      respectively. For comparison a third soil, a forest soil,
                      was incubated without any amendment. The amendments were
                      mixed into the top 20 cm of the field soils, resulting in
                      final concentrations of 8-9 g biochar/Kg soil and 11-12 g
                      digestate/Kg soil. The soils were incubated for about six
                      months at room temperature. Sorption-desorption experiments
                      were performed with CsCl and SrCl2 after pre-equilibrating
                      the soils with CaCl2 solutions.The amendments with field
                      application rates did not have a significant effect on the
                      relevant soil parameters responsible for the sorption
                      behavior of the two radionuclides. Comparatively, the soil
                      type lead to distinctive differences in sorption-desorption
                      dynamics of the two radionuclides. Cesium showed a higher
                      affinity for silty soil followed by forest soil and lowest
                      for sandy soil. Comparatively, strontium displayed a lower
                      adsorption for all three soils, with a slightly higher
                      adsorption in silty soil and almost similar sorption for
                      both forest and sandy soils. We conclude that the applied
                      organic amendments with field application rates will not
                      deplete the FES (Frayed Edge Sites) responsible for cesium
                      sorption in mineral soils. Furthermore, with the present
                      application rates the increase in amount of organic matter
                      is not high enough to significantly affect the strontium
                      sorption in mineral soils. The desorption experiments showed
                      that about 1/3 of the adsorbed cesium was extractable in
                      silty soil and almost half was extractable in forest and
                      sandy soils. In case of strontium, about half was
                      extractable in the three soils. Similar to sorption, the
                      effect of amendments was negligible compared to the soil
                      type.},
      month         = {Apr},
      date          = {2014-04-27},
      organization  = {EGU General Assembly, Vienna
                       (Austria), 27 Apr 2014 - 2 May 2014},
      subtyp        = {After Call},
      cin          = {IBG-3},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {245 - Chemicals in the Environment (POF2-245) / 255 -
                      Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF2-245 / G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/172147},
}