PMID- 36224231
OWN - NLM
STAT- MEDLINE
DCOM- 20221014
LR  - 20230103
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 12
IP  - 1
DP  - 2022 Oct 12
TI  - Mineralogy, morphology, and reaction kinetics of ureolytic bio-cementation in the 
      presence of seawater ions and varying soil materials.
PG  - 17100
LID - 10.1038/s41598-022-21268-3 [doi]
LID - 17100
AB  - Microbially-induced calcium carbonate precipitation (MICP) is a bio-cementation 
      process that can improve the engineering properties of granular soils through the 
      precipitation of calcium carbonate (CaCO(3)) minerals on soil particle surfaces 
      and contacts. The technology has advanced rapidly as an environmentally conscious 
      soil improvement method, however, our understanding of the effect of changes in 
      field-representative environmental conditions on the physical and chemical 
      properties of resulting precipitates has remained limited. An improved 
      understanding of the effect of subsurface geochemical and soil conditions on 
      process reaction kinetics and the morphology and mineralogy of bio-cementation 
      may be critical towards enabling successful field-scale deployment of the 
      technology and improving our understanding of the long-term chemical permanence 
      of bio-cemented soils in different environments. In this study, thirty-five batch 
      experiments were performed to specifically investigate the influence of seawater 
      ions and varying soil materials on the mineralogy, morphology, and reaction 
      kinetics of ureolytic bio-cementation. During experiments, differences in 
      reaction kinetics were quantified to identify conditions inhibiting CaCO(3) 
      precipitation and ureolysis. Following experiments, scanning electron microscopy, 
      x-ray diffraction, and chemical composition analyses were employed to quantify 
      differences in mineralogical compositions and material morphology. Ions present 
      in seawater and variations in soil materials were shown to significantly 
      influence ureolytic activity and precipitate mineralogy and morphology, however, 
      calcite remained the predominant CaCO(3) polymorph in all experiments with 
      relative percentages exceeding 80% by mass in all precipitates.
CI  - (c) 2022. The Author(s).
FAU - Burdalski, Robert J
AU  - Burdalski RJ
AD  - Department of Civil and Environmental Engineering, University of Washington, 
      Seattle, WA, 98195, USA.
FAU - Ribeiro, Bruna G O
AU  - Ribeiro BGO
AUID- ORCID: 0000-0003-3501-9089
AD  - Department of Civil and Environmental Engineering, University of Washington, 
      Seattle, WA, 98195, USA.
FAU - Gomez, Michael G
AU  - Gomez MG
AUID- ORCID: 0000-0002-4464-5447
AD  - Department of Civil and Environmental Engineering, University of Washington, 
      Seattle, WA, 98195, USA. mggomez@uw.edu.
FAU - Gorman-Lewis, Drew
AU  - Gorman-Lewis D
AUID- ORCID: 0000-0002-9687-7039
AD  - Department of Earth and Space Sciences, University of Washington, Seattle, WA, 
      98195, USA.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PT  - Research Support, U.S. Gov't, Non-P.H.S.
DEP - 20221012
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
RN  - 0 (Ions)
RN  - 0 (Soil)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - Calcium Carbonate/chemistry
MH  - *Cementation
MH  - Chemical Precipitation
MH  - Ions
MH  - Kinetics
MH  - Seawater/chemistry
MH  - *Soil/chemistry
PMC - PMC9556692
COIS- The authors declare no competing interests.
EDAT- 2022/10/13 06:00
MHDA- 2022/10/15 06:00
PMCR- 2022/10/12
CRDT- 2022/10/12 23:20
PHST- 2022/08/01 00:00 [received]
PHST- 2022/09/26 00:00 [accepted]
PHST- 2022/10/12 23:20 [entrez]
PHST- 2022/10/13 06:00 [pubmed]
PHST- 2022/10/15 06:00 [medline]
PHST- 2022/10/12 00:00 [pmc-release]
AID - 10.1038/s41598-022-21268-3 [pii]
AID - 21268 [pii]
AID - 10.1038/s41598-022-21268-3 [doi]
PST - epublish
SO  - Sci Rep. 2022 Oct 12;12(1):17100. doi: 10.1038/s41598-022-21268-3.