WFRF:(Hartmann Sara)
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Organic carbon source controlled microbial olivine dissolution in small-scale flow-through bioreactors, for CO2 removal
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- Corbett, Thomas (författare)
- Uppsala universitet,Institutionen för geovetenskaper
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- Westholm, Marcus (författare)
- Uppsala universitet,Institutionen för geovetenskaper
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- Rosling, Anna, 1974- (författare)
- Uppsala universitet,Evolutionsbiologi
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- Nature Publishing Group, 2024
- 2024
- Engelska.
- Ingår i: NPJ MATERIALS DEGRADATION. - : Nature Publishing Group. - 2397-2106. ; 8:1
- Tidskriftsartikel (refereegranskat)
Abstract
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- The development of carbon dioxide removal methods, coupled with decreased CO2 emissions, is fundamental to achieving the targets outlined in the Paris Agreement limiting global warming to 1.5 degrees C. Here we are investigating the importance of the organic carbon feedstock to support silicate mineral weathering in small-scale flow through bioreactors and subsequent CO2 sequestration. Here, we combine two bacteria and two fungi, widely reported for their weathering potential, in simple flow through bioreactors (columns) consisting of forsterite and widely available, cheap organic carbon sources (wheat straw, bio-waste digestate of pig manure and biowaste, and manure compost), over six weeks. Compared to their corresponding abiotic controls, the inoculated straw and digestate columns release more total alkalinity (similar to 2 times more) and produce greater dissolved and solid inorganic carbon (29% for straw and 13% for digestate), suggesting an increase in CO2 sequestration because of bio-enhanced silicate weathering. Microbial biomass is higher in the straw columns compared to the digestate and manure compost columns, with a phospholipid fatty acid derived total microbial biomass 10 x greater than the other biotic columns. Scanning Electron Microscopy imaging shows the most extensive colonisation and biofilm formation on the mineral surfaces in the straw columns. The biotic straw and digestate columns sequester 50 and 14 mg C more than their abiotic controls respectively, while there is no difference in the manure columns. The selection of organic carbon sources to support microbial communities in the flow through bioreactors controlls the silicate weathering rates and CO2 sequestration.
Ämnesord
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
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- Corbett, Thomas
- Westholm, Marcus
- Rosling, Anna, 1 ...
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- Poetra, Reinaldy
- Niron, Harun
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- Hagens, Mathilde
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- Vicca, Sara
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