PMID- 34716789
OWN - NLM
STAT- MEDLINE
DCOM- 20211116
LR  - 20211116
IS  - 1432-0614 (Electronic)
IS  - 0175-7598 (Linking)
VI  - 105
IP  - 23
DP  - 2021 Dec
TI  - Application of Bacillus mucilaginosus in the carbonation of steel slag.
PG  - 8663-8674
LID - 10.1007/s00253-021-11641-z [doi]
AB  - The stacking of steel slag has detrimental effects mainly for the waste of 
      resources and the pollution of environment. In this study, a novel method based 
      on microbially induced calcium precipitation (MICP) was proposed by utilizing a 
      type of microorganism named Bacillus mucilaginosus, which could secrete carbonic 
      anhydrase (CA) through the metabolism process, accelerating the hydration of 
      carbon dioxide (CO(2)) and thus facilitating the formation of carbonate ions 
      (CO(3)(2-)). First, comparing the biologically deposited calcium carbonate with 
      the chemically deposited one, it was found that the crystallinity and crystal 
      size of the biological deposition was lower, leading to its cementitious 
      properties. Under the condition of 1 wt. (weight) % dosage, the carbonation 
      degree increased from 66.34 to 86.25% and the compressive strength improved 
      greatly from 7.4 to 11.2 MPa as well. The weight gain rate of biologically 
      carbonated specimens was also twice as much as the directly carbonated ones. This 
      work strongly demonstrated that biological carbonation technology could not only 
      improve the CO(2) sequestration potential of steel slag but also enhance the 
      mechanical properties and durability of steel slag products. KEY POINTS: * 
      Bacillus mucilaginosus could resuscitate and proliferate in the steel slag 
      environment. * B. mucilaginosus secreted carbon anhydrase, which could accelerate 
      the hydration of CO(2) and facilitate the precipitation of calcium carbonate. * 
      Biologically carbonated steel slag had greater mechanical performance than 
      directly carbonated one.
CI  - (c) 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, 
      part of Springer Nature.
FAU - Jin, Peng
AU  - Jin P
AD  - College of Materials Science and Engineering, Southeast University, Nanjing, 
      211189, People's Republic of China.
AD  - Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing, 
      211189, People's Republic of China.
FAU - Zhang, Siyi
AU  - Zhang S
AD  - College of Materials Science and Engineering, Southeast University, Nanjing, 
      211189, People's Republic of China.
AD  - Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing, 
      211189, People's Republic of China.
FAU - Liu, Yu
AU  - Liu Y
AD  - College of Materials Science and Engineering, Southeast University, Nanjing, 
      211189, People's Republic of China.
AD  - Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing, 
      211189, People's Republic of China.
FAU - Zhang, Wei
AU  - Zhang W
AD  - College of Materials Science and Engineering, Southeast University, Nanjing, 
      211189, People's Republic of China. w69zhang@seu.edu.cn.
FAU - Wang, Ruixing
AU  - Wang R
AUID- ORCID: 0000-0002-7541-3614
AD  - College of Materials Science and Engineering, Southeast University, Nanjing, 
      211189, People's Republic of China. ruixing@seu.edu.cn.
AD  - Jiangsu Key Laboratory of Construction Materials, Southeast University, Nanjing, 
      211189, People's Republic of China. ruixing@seu.edu.cn.
LA  - eng
PT  - Journal Article
DEP - 20211030
PL  - Germany
TA  - Appl Microbiol Biotechnol
JT  - Applied microbiology and biotechnology
JID - 8406612
RN  - 0 (Carbonates)
RN  - 0 (Industrial Waste)
RN  - 12597-69-2 (Steel)
RN  - 142M471B3J (Carbon Dioxide)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - Paenibacillus mucilaginosus
SB  - IM
MH  - Calcium Carbonate
MH  - Carbon Dioxide
MH  - Carbonates
MH  - *Industrial Waste/analysis
MH  - Paenibacillus
MH  - *Steel
OTO - NOTNLM
OT  - Bacillus mucilaginosus
OT  - Carbonation
OT  - Carbonic anhydrase
OT  - Steel slag
EDAT- 2021/10/31 06:00
MHDA- 2021/11/17 06:00
CRDT- 2021/10/30 12:06
PHST- 2021/07/02 00:00 [received]
PHST- 2021/10/09 00:00 [accepted]
PHST- 2021/10/06 00:00 [revised]
PHST- 2021/10/31 06:00 [pubmed]
PHST- 2021/11/17 06:00 [medline]
PHST- 2021/10/30 12:06 [entrez]
AID - 10.1007/s00253-021-11641-z [pii]
AID - 10.1007/s00253-021-11641-z [doi]
PST - ppublish
SO  - Appl Microbiol Biotechnol. 2021 Dec;105(23):8663-8674. doi: 
      10.1007/s00253-021-11641-z. Epub 2021 Oct 30.