PMID- 37248271
OWN - NLM
STAT- MEDLINE
DCOM- 20230531
LR  - 20230602
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 13
IP  - 1
DP  - 2023 May 29
TI  - Biomineralization of coral sand by Bacillus thuringiensis isolated from a 
      travertine cave.
PG  - 8687
LID - 10.1038/s41598-023-35893-z [doi]
LID - 8687
AB  - Travertine is a typical product of microbial mineralization in the nature and its 
      mineral composition is mainly calcite and aragonite. In this paper, Bacillus 
      thuringiensis, a kind of mineralize bacterium is extracted from the travertine 
      crystal to cenment coral sand, and the reinforcement effect of microbial induced 
      carbonate precipitation (MICP) technology on coral sand under different 
      cementation times is studied. Firstly, the culture conditions are optimized in 
      nine pairs of trials, including urea content, microbial inoculation, shaker speed 
      and incubation time. Under the optimal culture conditions, the coral sand is 
      cemented by soaking method. With the increase of reinforcement times, the 
      permeability coefficient of the sand sample is reduced to 10(-4) cm/s, and the 
      shear strength is increased by more than 130%. Compared with Sporosarcina 
      pasteurii, the cohesion and internal friction angle of the coral sand column 
      cemented by Bacillus thuringiensis are increased by more than 50% and 10%, 
      respectively. The area distribution of T(2) spectrum shows that with the increase 
      of the number of cementation, the amplitude of the main peak decreases, 
      indicating that the large pores are better filled, the number of medium and small 
      pores are also reduced, and the pore area is significantly reduced, with the 
      amplitude of about 44%. The above experiments verified that microorganism in 
      travertine could also be used in MICP technology, and even achieve better 
      reinforcement effect. It also provides a new way and idea for the selection of 
      mineralized bacteria by MICP technology.
CI  - (c) 2023. The Author(s).
FAU - Xiao, Yao
AU  - Xiao Y
AD  - Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of 
      Education, College of Civil Engineering & Architecture, China Three Gorges 
      University, Yichang, 443000, Hubei Province, China.
FAU - Deng, Huafeng
AU  - Deng H
AD  - Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of 
      Education, College of Civil Engineering & Architecture, China Three Gorges 
      University, Yichang, 443000, Hubei Province, China. dhf8010@ctgu.edu.cn.
FAU - Li, Jianlin
AU  - Li J
AD  - Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, Ministry of 
      Education, College of Civil Engineering & Architecture, China Three Gorges 
      University, Yichang, 443000, Hubei Province, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20230529
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
RN  - 0 (Sand)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - 0 (Carbonates)
SB  - IM
MH  - *Bacillus thuringiensis
MH  - Sand
MH  - Biomineralization
MH  - Calcium Carbonate/chemistry
MH  - Carbonates
MH  - Chemical Precipitation
PMC - PMC10227000
COIS- The authors declare no competing interests.
EDAT- 2023/05/30 01:06
MHDA- 2023/05/31 06:42
PMCR- 2023/05/29
CRDT- 2023/05/29 23:18
PHST- 2022/03/30 00:00 [received]
PHST- 2023/05/25 00:00 [accepted]
PHST- 2023/05/31 06:42 [medline]
PHST- 2023/05/30 01:06 [pubmed]
PHST- 2023/05/29 23:18 [entrez]
PHST- 2023/05/29 00:00 [pmc-release]
AID - 10.1038/s41598-023-35893-z [pii]
AID - 35893 [pii]
AID - 10.1038/s41598-023-35893-z [doi]
PST - epublish
SO  - Sci Rep. 2023 May 29;13(1):8687. doi: 10.1038/s41598-023-35893-z.