PMID- 31868651
OWN - NLM
STAT- MEDLINE
DCOM- 20200206
LR  - 20200206
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 257
DP  - 2020 Mar 1
TI  - Microbially induced calcite precipitation in calcareous soils by endogenous 
      Bacillus cereus, at high pH and harsh weather.
PG  - 109965
LID - S0301-4797(19)31683-4 [pii]
LID - 10.1016/j.jenvman.2019.109965 [doi]
AB  - Microbially induced calcite precipitation (MICP) improves the physical properties 
      of soils by increasing the solid content, decreasing the pore sizes and improving 
      the rigidity of the particle-to-particle contact ending with a better mechanical 
      and geotechnical performances of the soils. First, the physical characteristics 
      of soils in Qatar showed similar grain size distributions with most falling in 
      the category of fine particles (30 mum-1 mum), which is appropriate for MICP 
      processes. MICP is ensured by the ureolytic activity of urease producing 
      bacteria. However, Qatari soils are characterized with high carbonate contents 
      exceeding 20%, high alkalinity and fluctuations of temperature and aeration. 
      Although such properties can cause calcite dissolution as reported in literature, 
      two Qatari endogenous B. cereus strains, QBB4 and QBB5, were shown able to adapt 
      to the harsh conditions and induce mineral formations by MICP. Their optimal 
      potentials was at wide ranges of temperature from 30  degrees C to 42  degrees C and pH from 7.0 
      to 8.0. Using Qatari bacteria in liquid cultures and at syringe level at 
      laboratory conditions, as well as in plots at field conditions, 16% CaCO(3) 
      increase in minerals formation was obtained, leading to 7% increase of soils 
      stability. Increase of carbonate contents was also shown by an increase in the 
      stability of aggregates to disintegration when incubated in water using a 0.25 mm 
      sieve. MICP in Qatari soils is feasible using B. cereus QBB4, as this is an 
      endogenous bacterium that tolerates harsh conditions, high alkalinity and calcium 
      contents. The performance of these bacterial strains was achieved with clear 
      formation of aragonite, feldspars and quartz in the calcareous soils.
CI  - Copyright (c) 2019 Elsevier Ltd. All rights reserved.
FAU - Oualha, Meriam
AU  - Oualha M
AD  - Department of Biological and Environmental Sciences, College of Arts and 
      Sciences, Qatar University, PoB 2713, Doha, Qatar.
FAU - Bibi, Shazia
AU  - Bibi S
AD  - Department of Biological and Environmental Sciences, College of Arts and 
      Sciences, Qatar University, PoB 2713, Doha, Qatar.
FAU - Sulaiman, Muhannad
AU  - Sulaiman M
AD  - Department of Civil and Environmental Engineering, Lehigh University, USA.
FAU - Zouari, Nabil
AU  - Zouari N
AD  - Department of Biological and Environmental Sciences, College of Arts and 
      Sciences, Qatar University, PoB 2713, Doha, Qatar. Electronic address: 
      Nabil.Zouari@qu.edu.qa.
LA  - eng
PT  - Journal Article
DEP - 20191220
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 0 (Soil)
RN  - H0G9379FGK (Calcium Carbonate)
SB  - IM
MH  - Bacillus cereus
MH  - *Calcium Carbonate
MH  - Chemical Precipitation
MH  - Hydrogen-Ion Concentration
MH  - *Soil
MH  - Weather
OTO - NOTNLM
OT  - Bacillus cereus
OT  - MICP
OT  - Soils stability
EDAT- 2019/12/24 06:00
MHDA- 2020/02/07 06:00
CRDT- 2019/12/24 06:00
PHST- 2019/09/14 00:00 [received]
PHST- 2019/12/02 00:00 [revised]
PHST- 2019/12/05 00:00 [accepted]
PHST- 2019/12/24 06:00 [pubmed]
PHST- 2020/02/07 06:00 [medline]
PHST- 2019/12/24 06:00 [entrez]
AID - S0301-4797(19)31683-4 [pii]
AID - 10.1016/j.jenvman.2019.109965 [doi]
PST - ppublish
SO  - J Environ Manage. 2020 Mar 1;257:109965. doi: 10.1016/j.jenvman.2019.109965. Epub 
      2019 Dec 20.