PMID- 31211807
OWN - NLM
STAT- MEDLINE
DCOM- 20200220
LR  - 20200309
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 14
IP  - 6
DP  - 2019
TI  - Influence of temperature on microbially induced calcium carbonate precipitation 
      for soil treatment.
PG  - e0218396
LID - 10.1371/journal.pone.0218396 [doi]
LID - e0218396
AB  - Microbially induced calcium carbonate precipitation (MICP) is a potential method 
      for improvement of soil. A laboratory study was conducted to investigate the 
      influence of temperatures for soil improvement by MICP. The ureolytic activity 
      experiments, MICP experiments in aqueous solution and sand column using 
      Sporosarcina pasteurii were conducted at different temperatures(10, 15, 20, 25 
      and 30 degrees C). The results showed there were microbially induced CaCO3 precipitation 
      at all the temperatures from 10 to 30 degrees C. The results of ureolytic activity 
      experiments showed that the bacterial had higher ureolytic activity at high 
      temperatures within the early 20 hours, however, the ureolytic activity at higher 
      temperatures decreased more quickly than at lower temperatures. The results of 
      MICP experiments in aqueous solution and sand column were consistent with tests 
      of ureolytic activity. Within 20 to 50 hours of the start of the test, more CaCO3 
      precipitation was precipitated at higher temperature, subsequently, the 
      precipitation rate of all experiments decreased, and the higher the temperature, 
      the faster the precipitation rate dropped. The final precipitation amount of 
      CaCO3 in aqueous solution and sand column tests at 10  degrees C was 92% and 37% higher 
      than that at 30  degrees C. The maximum unconfined compressive strength of MICP treated 
      sand column at 10  degrees C was 135% higher than that at 30  degrees C. The final treatment 
      effect of MICP at lower temperature was better than that at high temperature 
      within the temperature range studied. The reason for better treatment effect at 
      lower temperatures was due to the longer retention time of ureolytic activity of 
      bacteria at lower temperatures.
FAU - Peng, Jie
AU  - Peng J
AUID- ORCID: 0000-0003-4747-568X
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing, Jiangsu, China.
AD  - Geotechnical Research Institute, Hohai University, Nanjing, Jiangsu, China.
FAU - Liu, Zhiming
AU  - Liu Z
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing, Jiangsu, China.
AD  - Geotechnical Research Institute, Hohai University, Nanjing, Jiangsu, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20190618
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
RN  - 059QF0KO0R (Water)
RN  - 8W8T17847W (Urea)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - Sporosarcina pasteurii
SB  - IM
MH  - Calcium Carbonate/*chemistry/metabolism
MH  - Chemical Precipitation/drug effects
MH  - *Soil Microbiology
MH  - Sporosarcina/chemistry/*metabolism
MH  - Temperature
MH  - Urea/chemistry/metabolism
MH  - Water/chemistry
PMC - PMC6581288
COIS- The authors have declared that no competing interests exist.
EDAT- 2019/06/19 06:00
MHDA- 2020/02/23 06:00
PMCR- 2019/06/18
CRDT- 2019/06/19 06:00
PHST- 2019/02/11 00:00 [received]
PHST- 2019/06/01 00:00 [accepted]
PHST- 2019/06/19 06:00 [entrez]
PHST- 2019/06/19 06:00 [pubmed]
PHST- 2020/02/23 06:00 [medline]
PHST- 2019/06/18 00:00 [pmc-release]
AID - PONE-D-19-04135 [pii]
AID - 10.1371/journal.pone.0218396 [doi]
PST - epublish
SO  - PLoS One. 2019 Jun 18;14(6):e0218396. doi: 10.1371/journal.pone.0218396. 
      eCollection 2019.