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@ARTICLE{Izumoto:910241,
      author       = {Izumoto, Satoshi and Huisman, Johan Alexander and
                      Zimmermann, Egon and Heyman, Joris and Gomez, Francesco and
                      Tabuteau, Hervé and Laniel, Romain and Vereecken, Harry and
                      Méheust, Yves and Le Borgne, Tanguy},
      title        = {{P}ore-{S}cale {M}echanisms for {S}pectral {I}nduced
                      {P}olarization of {C}alcite {P}recipitation {I}nferred from
                      {G}eo-{E}lectrical {M}illifluidics},
      journal      = {Environmental science $\&$ technology},
      volume       = {56},
      number       = {8},
      issn         = {0013-936X},
      address      = {Columbus, Ohio},
      publisher    = {American Chemical Society},
      reportid     = {FZJ-2022-03703},
      pages        = {4998 - 5008},
      year         = {2022},
      abstract     = {Spectral induced polarization (SIP) has the potential for
                      monitoring reactive processes in the subsurface. While
                      strong SIP responses have been measured in response to
                      calcite precipitation, their origin and mechanism remain
                      debated. Here we present a novel geo-electrical millifluidic
                      setup designed to observe microscale reactive transport
                      processes while performing SIP measurements. We induced
                      calcite precipitation by injecting two reactive solutions
                      into a porous medium, which led to highly localized
                      precipitates at the mixing interface. Strikingly, the
                      amplitude of the SIP response increased by $340\%$ during
                      the last $7\%$ increase in precipitate volume. Furthermore,
                      while the peak frequency in SIP response varied spatially
                      over 1 order of magnitude, the crystal size range was
                      similar along the front, contradicting assumptions in the
                      classical grain polarization model. We argue that the SIP
                      response of calcite precipitation in such mixing fronts is
                      governed by Maxwell–Wagner polarization due to the
                      establishment of a precipitate wall. Numerical simulations
                      of the electric field suggested that spatial variation in
                      peak frequency was related to the macroscopic shape of the
                      front. These findings provide new insights into the SIP
                      response of calcite precipitation and highlight the
                      potential of geoelectrical millifluidics for understanding
                      and modeling electrical signatures of reactive transport
                      processes.},
      cin          = {IBG-3},
      ddc          = {333.7},
      cid          = {I:(DE-Juel1)IBG-3-20101118},
      pnm          = {2173 - Agro-biogeosystems: controls, feedbacks and impact
                      (POF4-217)},
      pid          = {G:(DE-HGF)POF4-2173},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {35353529},
      UT           = {WOS:000793137500031},
      doi          = {10.1021/acs.est.1c07742},
      url          = {https://juser.fz-juelich.de/record/910241},
}