PMID- 34352478
OWN - NLM
STAT- MEDLINE
DCOM- 20210921
LR  - 20210921
IS  - 1095-8630 (Electronic)
IS  - 0301-4797 (Linking)
VI  - 298
DP  - 2021 Nov 15
TI  - Copper mine tailings valorization using microbial induced calcium carbonate 
      precipitation.
PG  - 113440
LID - S0301-4797(21)01502-4 [pii]
LID - 10.1016/j.jenvman.2021.113440 [doi]
AB  - The solidification of copper mine tailings was investigated by using the natural 
      biological process known as microbial induced calcium carbonate precipitation 
      (MICP) as a potential method to valorize this waste stream. A submergent method 
      was used to grow bio-columns and the toxicity of copper on Sporosarcina pasteurii 
      (the ureolytic bacteria which drives the MICP process) was investigated. The 
      bio-columns produced from copper mine tailings had a compressive strength of 
      0.54 MPa, lower than bio-columns produced from beach sand (1.85 MPa). The low 
      porosity of the copper mine tailings limited the depth to which the MICP reaction 
      could successfully occur, resulting in a 1.8 mm +/- 0.4 mm crust forming around the 
      outer extremities of the bio-columns. The results demonstrated that the particle 
      size was a key deciding factor and that, as a result, MICP is not suitable for 
      producing 'thick' bio-cemented materials from small particles (<100 mum) such as 
      mine tailings. However, this method could produce thinner material such as 
      bio-tiles or it could even be used to potentially cement together toxic dust 
      particles typically formed on mine tailing heaps.
CI  - Copyright (c) 2021 Elsevier Ltd. All rights reserved.
FAU - de Oliveira, D
AU  - de Oliveira D
AD  - Civil Engineering Department and Future Water Institute, University of Cape Town, 
      Cape Town, 7700, South Africa.
FAU - Horn, Emma J
AU  - Horn EJ
AD  - Civil Engineering Department and Future Water Institute, University of Cape Town, 
      Cape Town, 7700, South Africa.
FAU - Randall, D G
AU  - Randall DG
AD  - Civil Engineering Department and Future Water Institute, University of Cape Town, 
      Cape Town, 7700, South Africa. Electronic address: dyllon.randall@uct.ac.za.
LA  - eng
PT  - Journal Article
DEP - 20210802
PL  - England
TA  - J Environ Manage
JT  - Journal of environmental management
JID - 0401664
RN  - 789U1901C5 (Copper)
RN  - H0G9379FGK (Calcium Carbonate)
RN  - Sporosarcina pasteurii
SB  - IM
MH  - *Calcium Carbonate
MH  - Copper
MH  - Mining
MH  - *Sporosarcina
OTO - NOTNLM
OT  - Acclimation
OT  - Bio-material
OT  - Dust suppression
OT  - Repurposing
OT  - Sporosarcina pasteurii
OT  - Urease
EDAT- 2021/08/06 06:00
MHDA- 2021/09/22 06:00
CRDT- 2021/08/05 20:20
PHST- 2021/05/24 00:00 [received]
PHST- 2021/07/23 00:00 [revised]
PHST- 2021/07/29 00:00 [accepted]
PHST- 2021/08/06 06:00 [pubmed]
PHST- 2021/09/22 06:00 [medline]
PHST- 2021/08/05 20:20 [entrez]
AID - S0301-4797(21)01502-4 [pii]
AID - 10.1016/j.jenvman.2021.113440 [doi]
PST - ppublish
SO  - J Environ Manage. 2021 Nov 15;298:113440. doi: 10.1016/j.jenvman.2021.113440. 
      Epub 2021 Aug 2.