PMID- 33013787
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201006
IS  - 1664-302X (Print)
IS  - 1664-302X (Electronic)
IS  - 1664-302X (Linking)
VI  - 11
DP  - 2020
TI  - Dolerite Fines Used as a Calcium Source for Microbially Induced Calcite 
      Precipitation Reduce the Environmental Carbon Cost in Sandy Soil.
PG  - 557119
LID - 10.3389/fmicb.2020.557119 [doi]
LID - 557119
AB  - 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 (CaCl(2)) 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 CO(2) and formation of pedogenic 
      carbonates. We investigated atmospheric carbon fluxes of a MICP treated sandy 
      soil using CaCl(2) 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 CO(2) fluxes during 
      chemical weathering of dolerite fines were investigated in incubation experiments 
      with gas chromatography. Larger CO(2) emissions resulted from the application of 
      dolerite fines (116 g CO(2)-C m(-2)) compared to CaCl(2) (79 g CO(2)-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 (delta(13)C(av) = -8.2 +/- 5.0 per thousand) formed when dolerite was applied 
      and carbon originating from urea (delta(13)C(av) = -46.4 +/- 1.0 per thousand) precipitated when 
      CaCl(2) was used. Dolerite fines had a large but short-lived (<2 d) carbon 
      sequestration potential, and results indicated peak CO(2) emissions during MICP 
      could be balanced optimising the application of dolerite fines.
CI  - Copyright (c) 2020 Casas, Graf, Bruggemann, Schaschke and Jorat.
FAU - Casas, Carla C
AU  - Casas CC
AD  - School of Applied Sciences, Abertay University, Dundee, United Kingdom.
FAU - Graf, Alexander
AU  - Graf A
AD  - Institute for Bio- and Geosciences, IBG-3: Agrosphere, Forschungszentrum Julich, 
      Julich, Germany.
FAU - Bruggemann, Nicolas
AU  - Bruggemann N
AD  - Institute for Bio- and Geosciences, IBG-3: Agrosphere, Forschungszentrum Julich, 
      Julich, Germany.
FAU - Schaschke, Carl J
AU  - Schaschke CJ
AD  - School of Computing, Engineering and Physical Sciences, University of the West of 
      Scotland, Paisley, United Kingdom.
FAU - Jorat, M Ehsan
AU  - Jorat ME
AD  - School of Applied Sciences, Abertay University, Dundee, United Kingdom.
LA  - eng
PT  - Journal Article
DEP - 20200908
PL  - Switzerland
TA  - Front Microbiol
JT  - Frontiers in microbiology
JID - 101548977
PMC - PMC7505998
OTO - NOTNLM
OT  - CO2 emissions
OT  - CO2 sequestration
OT  - MICP
OT  - basaltic quarry fines
OT  - calcite
OT  - calcium-rich silicate rock
OT  - pedogenic carbonates
OT  - weathering
EDAT- 2020/10/06 06:00
MHDA- 2020/10/06 06:01
PMCR- 2020/09/08
CRDT- 2020/10/05 06:16
PHST- 2020/04/29 00:00 [received]
PHST- 2020/08/17 00:00 [accepted]
PHST- 2020/10/05 06:16 [entrez]
PHST- 2020/10/06 06:00 [pubmed]
PHST- 2020/10/06 06:01 [medline]
PHST- 2020/09/08 00:00 [pmc-release]
AID - 10.3389/fmicb.2020.557119 [doi]
PST - epublish
SO  - Front Microbiol. 2020 Sep 8;11:557119. doi: 10.3389/fmicb.2020.557119. 
      eCollection 2020.