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@ARTICLE{Casas:884090,
      author       = {Casas, Carla C. and Graf, Alexander and Brüggemann,
                      Nicolas and Schaschke, Carl J. and Jorat, M. Ehsan},
      title        = {{D}olerite {F}ines {U}sed as a {C}alcium {S}ource for
                      {M}icrobially {I}nduced {C}alcite {P}recipitation {R}educe
                      the {E}nvironmental {C}arbon {C}ost in {S}andy {S}oil},
      journal      = {Frontiers in microbiology},
      volume       = {11},
      issn         = {1664-302X},
      address      = {Lausanne},
      publisher    = {Frontiers Media},
      reportid     = {FZJ-2020-03087},
      pages        = {557119},
      year         = {2020},
      abstract     = {Microbial-Induced Calcite Precipitation (MICP) stimulates
                      soil microbiota to induce a cementation of the soil matrix.
                      Urea, calcium and simple carbon nutrients are supplied to
                      produce carbonates via urea hydrolysis and induce the
                      precipitation of the mineral calcite. Calcium chloride
                      (CaCl2) is typically used as a source for calcium, but basic
                      silicate rocks and other materials have been investigated as
                      alternatives. Weathering of calcium-rich silicate rocks
                      (e.g., basalt and dolerite) releases calcium, magnesium and
                      iron; this process is associated with sequestration of
                      atmospheric CO2 and formation of pedogenic carbonates. We
                      investigated atmospheric carbon fluxes of a MICP treated
                      sandy soil using CaCl2 and dolerite fines applied on the
                      soil surface as sources for calcium. Soil-atmosphere carbon
                      fluxes were monitored over 2 months and determined with an
                      infrared gas analyser connected to a soil chamber. Soil
                      inorganic carbon content and isotopic composition were
                      determined with isotope-ratio mass spectrometry. In
                      addition, soil-atmosphere CO2 fluxes during chemical
                      weathering of dolerite fines were investigated in incubation
                      experiments with gas chromatography. Larger CO2 emissions
                      resulted from the application of dolerite fines (116 g CO2-C
                      m–2) compared to CaCl2 (79 g CO2-C m–2) but larger
                      inorganic carbon precipitation also occurred (172.8 and 76.9
                      g C m–2, respectively). Normalising to the emitted carbon
                      to precipitated carbon, the environmental carbon cost was
                      reduced with dolerite fines (0.67) compared to the
                      traditional MICP treatment (1.01). The carbon isotopic
                      signature indicated pedogenic carbonates (δ13Cav = −8.2
                      ± 5.0‰) formed when dolerite was applied and carbon
                      originating from urea (δ13Cav = −46.4 ± 1.0‰)
                      precipitated when CaCl2 was used. Dolerite fines had a large
                      but short-lived (<2 d) carbon sequestration potential, and
                      results indicated peak CO2 emissions during MICP could be
                      balanced optimising the application of dolerite fines.},
      cin          = {IBG-3},
      ddc          = {570},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {255 - Terrestrial Systems: From Observation to Prediction
                      (POF3-255)},
      pid          = {G:(DE-HGF)POF3-255},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:33013787},
      UT           = {WOS:000574337000001},
      doi          = {10.3389/fmicb.2020.557119},
      url          = {https://juser.fz-juelich.de/record/884090},
}