PMID- 33513489
OWN - NLM
STAT- MEDLINE
DCOM- 20210318
LR  - 20210318
IS  - 1879-1026 (Electronic)
IS  - 0048-9697 (Linking)
VI  - 770
DP  - 2021 May 20
TI  - A preliminary study of solid-waste coal gangue based biomineralization as 
      eco-friendly underground backfill material: Material preparation and macro-micro 
      analyses.
PG  - 145241
LID - S0048-9697(21)00307-7 [pii]
LID - 10.1016/j.scitotenv.2021.145241 [doi]
AB  - Solid-waste coal gangue (CG) mixed with cement as underground backfilling 
      material is widely applied in coal mines throughout China. However, this material 
      can pollute the environment during its production, preparation, and 
      transportation, which is mainly caused by cement. As a cement-free eco-friendly 
      technology, microbially induced carbonate precipitation (MICP) technology can 
      produce biomineralization products to consolidate loose grains, and the microbial 
      growth environment is adapted to underground temperature with no pollution. To 
      this end, this study gets the Bacillus pasteurii with special resistance by 
      strain domestication, proposes a CG-based bio-mineralized underground backfilling 
      material without using cement, and analyses the characteristics of it from macro- 
      to microscopic perspectives by dissolution test, scanning electron microscopy 
      (SEM), Energy-dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The 
      results indicate that strain domestication leads to B. pasteurii, which can 
      withstand CG leaching solution and 1 M urea simultaneously. This satisfies the 
      basic requirements of CG based mineralized material. Through the circulation 
      perfusion method, the intact CG based biomineralized specimens are obtained. 
      Macroscopically, the bacteria bind gangue grains into a whole with high 
      biomineral content (11.66%). The utilization rate of mineralizing solution is up 
      to 66.82% which makes good use of raw materials. Microscopically, a new crystal 
      formation is observed, and CG particles are consolidated well where the crystals 
      precipitate to fill the pores and bind the particles together. Hence this method 
      has a significant influence on the deposition of biominerals. Meanwhile the 
      biomineralization improves the microstructure considerably and bonds the CG 
      particles as a whole. A comprehensive analysis of the test results shows that, 
      from an environment viewpoint, the preliminary study of new CG based 
      bio-mineralized material is successful.
CI  - Copyright (c) 2021. Published by Elsevier B.V.
FAU - Guo, Shijie
AU  - Guo S
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China.
FAU - Zhang, Jixiong
AU  - Zhang J
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China. Electronic 
      address: zjxiong@163.com.
FAU - Li, Meng
AU  - Li M
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China. Electronic 
      address: limeng1989@cumt.edu.cn.
FAU - Zhou, Nan
AU  - Zhou N
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China.
FAU - Song, Weijian
AU  - Song W
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China.
FAU - Wang, Zhaojun
AU  - Wang Z
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China.
FAU - Qi, Shengming
AU  - Qi S
AD  - State Key Laboratory of Coal Resources and Safe Mining, China University of 
      Mining & Technology, Xuzhou, Jiangsu 221116, China; School of Mines, China 
      University of Mining & Technology, Xuzhou, Jiangsu 221116, China.
LA  - eng
PT  - Journal Article
DEP - 20210120
PL  - Netherlands
TA  - Sci Total Environ
JT  - The Science of the total environment
JID - 0330500
RN  - 0 (Coal)
RN  - 0 (Solid Waste)
RN  - Sporosarcina pasteurii
SB  - IM
MH  - *Biomineralization
MH  - China
MH  - *Coal
MH  - Solid Waste
MH  - Sporosarcina
OTO - NOTNLM
OT  - Bacillus pasteurii
OT  - Bio-mineralized underground backfilling material
OT  - Circulation perfusion method
OT  - Solid-waste coal gangue
OT  - Strain domestication
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- 2021/01/30 06:00
MHDA- 2021/03/19 06:00
CRDT- 2021/01/29 20:08
PHST- 2020/10/29 00:00 [received]
PHST- 2021/01/11 00:00 [revised]
PHST- 2021/01/13 00:00 [accepted]
PHST- 2021/01/30 06:00 [pubmed]
PHST- 2021/03/19 06:00 [medline]
PHST- 2021/01/29 20:08 [entrez]
AID - S0048-9697(21)00307-7 [pii]
AID - 10.1016/j.scitotenv.2021.145241 [doi]
PST - ppublish
SO  - Sci Total Environ. 2021 May 20;770:145241. doi: 10.1016/j.scitotenv.2021.145241. 
      Epub 2021 Jan 20.