A greenhouse-scale photosynthetic microbial bioreactor for carbon sequestration in magnesium carbonate minerals

McCutcheon, Jenine, Power, Ian M., Harrison, Anna L., Dipple, Gregory M. and Southam, Gordon (2014) A greenhouse-scale photosynthetic microbial bioreactor for carbon sequestration in magnesium carbonate minerals. Environmental Science and Technology, 48 16: 9142-9151. doi:10.1021/es500344s


Author McCutcheon, Jenine
Power, Ian M.
Harrison, Anna L.
Dipple, Gregory M.
Southam, Gordon
Title A greenhouse-scale photosynthetic microbial bioreactor for carbon sequestration in magnesium carbonate minerals
Journal name Environmental Science and Technology   Check publisher's open access policy
ISSN 0013-936X
1520-5851
Publication date 2014-08-19
Year available 2014
Sub-type Article (original research)
DOI 10.1021/es500344s
Volume 48
Issue 16
Start page 9142
End page 9151
Total pages 10
Place of publication Washington, DC United States
Publisher American Chemical Society
Collection year 2015
Language eng
Abstract A cyanobacteria dominated consortium collected from an alkaline wetland located near Atlin, British Columbia, Canada accelerated the precipitation of platy hydromagnesite [Mg5(CO3)4(OH) 2·4H2O] in a linear flow-through experimental model wetland. The concentration of magnesium decreased rapidly within 2 m of the inflow point of the 10-m-long (∼1.5 m2) bioreactor. The change in water chemistry was monitored over two months along the length of the channel. Carbonate mineralization was associated with extra-cellular polymeric substances in the nutrient-rich upstream portion of the bioreactor, while the lower part of the system, which lacked essential nutrients, did not exhibit any hydromagnesite precipitation. A mass balance calculation using the water chemistry data produced a carbon sequestration rate of 33.34 t of C/ha per year. Amendment of the nutrient deficiency would intuitively allow for increased carbonation activity. Optimization of this process will have application as a sustainable mining practice by mediating magnesium carbonate precipitation in ultramafic mine tailings storage facilities.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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