PMID- 36063935
OWN - NLM
STAT- MEDLINE
DCOM- 20221021
LR  - 20221021
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 852
DP  - 2022 Dec 15
TI  - Mechanism of microbiologically induced calcite precipitation for cadmium 
      mineralization.
PG  - 158465
LID - S0048-9697(22)05564-4 [pii]
LID - 10.1016/j.scitotenv.2022.158465 [doi]
AB  - Microbiologically induced calcite precipitation (MICP) technology shows potential 
      for remediating heavy metal pollution; however, the underlying mechanism of heavy 
      metal mineralization is not well-understood, limiting the application of this 
      technology. In this study, we targeted Cd contamination (using 15:1, 25:1, and 
      50:1 Ca(2+)/Cd(2+) molar ratios) and showed that the ureolytic bacteria 
      Sporosarcina ureilytica ML-2 removed >99.7 % Cd(2+) with a maximum fixation 
      capacity of 75.61 mg-Cd/g-CaCO(3) and maximum precipitation production capacity 
      of 135.99 mg-CaCO(3)/mg-cells. Quantitative PCR analysis showed that Cd(2+) 
      inhibited the expression of urease genes (ureC, ureE, ureF, and ureG) by 70 % in 
      the ML-2 strain. Additionally, the pseudo-first-order kinetics model (R(2) = 
      0.9886), intraparticle diffusion model (R(2) = 0.9972), and Temkin isotherm model 
      (R(2) = 0.9828) described the immobilization process of Cd(2+) by bio calcite in 
      MICP-Cd system. The three Cd(2+) mineralization products generated by MICP were 
      attributed to surface precipitation (Cd(2+) --> Cd(OH)(2)), direct binding with the 
      CO(3)(2-)/substitution calcium site of calcite (Cd(2+) --> CdCO(3), otavite), and 
      calcite lattice vacancy anchors (Cd(2+) --> (Ca(x)Cd(1-x))CO(3)). Our findings 
      improve the understanding of the mechanisms by which MICP can achieve in situ 
      stabilization of heavy metals.
CI  - Copyright (c) 2022. Published by Elsevier B.V.
FAU - Zeng, Yong
AU  - Zeng Y
AD  - State Key Laboratory of Pollution Control and Resource Reuse, School of 
      Environment, Nanjing University, Nanjing 210023, PR China. Electronic address: 
      zy_duty@163.com.
FAU - Chen, Zezhi
AU  - Chen Z
AD  - State Key Laboratory of Pollution Control and Resource Reuse, School of 
      Environment, Nanjing University, Nanjing 210023, PR China. Electronic address: 
      chenzzg@nju.edu.cn.
FAU - Lyu, Qingyang
AU  - Lyu Q
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China.
FAU - Wang, Xiuxiu
AU  - Wang X
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China.
FAU - Du, Yaling
AU  - Du Y
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China.
FAU - Huan, Chenchen
AU  - Huan C
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China.
FAU - Liu, Yang
AU  - Liu Y
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China.
FAU - Yan, Zhiying
AU  - Yan Z
AD  - CAS Key Laboratory of Environmental and Applied Microbiology, Environmental 
      Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, 
      Chinese Academy of Sciences, Chengdu 610041, PR China. Electronic address: 
      yanzy@cib.ac.cn.
LA  - eng
PT  - Journal Article
DEP - 20220905
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 00BH33GNGH (Cadmium)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - EC 3.5.1.5 (Urease)
RN  - SY7Q814VUP (Calcium)
RN  - 0 (Metals, Heavy)
SB  - IM
MH  - *Cadmium/metabolism
MH  - Calcium Carbonate/metabolism
MH  - Urease
MH  - Calcium
MH  - *Metals, Heavy
MH  - Chemical Precipitation
OTO - NOTNLM
OT  - Adsorption model
OT  - Cd
OT  - MICP
OT  - Mineralized species
OT  - Molar ratio
OT  - Urease gene
COIS- Declaration of competing interest The authors declare that they have no known 
      competing financial interests or personal relationships that could have appeared 
      to influence the work reported in this paper.
EDAT- 2022/09/06 06:00
MHDA- 2022/10/22 06:00
CRDT- 2022/09/05 19:23
PHST- 2022/06/23 00:00 [received]
PHST- 2022/08/28 00:00 [revised]
PHST- 2022/08/29 00:00 [accepted]
PHST- 2022/09/06 06:00 [pubmed]
PHST- 2022/10/22 06:00 [medline]
PHST- 2022/09/05 19:23 [entrez]
AID - S0048-9697(22)05564-4 [pii]
AID - 10.1016/j.scitotenv.2022.158465 [doi]
PST - ppublish
SO  - Sci Total Environ. 2022 Dec 15;852:158465. doi: 10.1016/j.scitotenv.2022.158465. 
      Epub 2022 Sep 5.