Cited by 94CO2 Sequestration and Geologic InteractionsSoil Carbon and Nitrogen DynamicsMicrobial Applications in Construction Materials

Biological enhancement of soil carbonate precipitation: passive removal of atmospheric CO2

Manning, D. A. C.·2008·Mineralogical Magazine

Abstract

Abstract Soils are the dominant terrestrial sink for carbon, containing three times as much C as above-ground plant biomass, and acting as a host for both organic and inorganic C, as soil organic matter and pedogenic carbonates, respectively. This article reviews evidence for the generation within the soil solution of dissolved C derived from plants and recognition of its precipitation as carbonates. It then considers the potential value of this process for artificially-mediated CO2 sequestration within soils. The ability of crops such as wheat to produce organic acid anions as root exudates is substantial, generating 70 mol/(y kg) of exuded C, equivalent to the plant's own ‘body weight’. This is still an order of magnitude less than measured C production from Icelandic woodlands (Moulton et al., 2000), which have no other possible source of C. Thus, there is apparently no shortage of available dissolved C, as bicarbonate in solution, and so the formation of pedogenic carbonates will be controlled by the availability of Ca. This is derived from mineral weathering, primarily of silicate minerals (natural plagioclase feldspars and pyroxenes; artificial cement and slag minerals). Within the UK, existing industrial arisings of calcium silicate minerals from quarrying, demolition and steel manufacture that are fine-grained and suitable for incorporation into soils are sufficient to account for 3 MT CO2 per year, compensating for half of the emissions from UK cement manufacture. Pursuing these arguments, it is shown that soils have a role to play as passive agents in the removal of atmospheric CO2, analogous to the use of reed beds to clean contaminated waters.

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Crossref · 10.1180/minmag.2008.072.2.639

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  • Work at other sites shows that pedogenic carbonates are widespread in artificially created urban soils containing Ca and Mg silicate minerals.

    “Work at other sites shows that the occurrence of pedogenic carbonates is widespread in artificially created urban soils containing Ca and Mg silicate minerals.”

    From Rapid Removal of Atmospheric CO2 by Urban Soils (2015) · cites this paper as [12]

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Authors
Manning, D. A. C.
Affiliations
Newcastle University (GB)
Corresponding author
Manning, D. A. C.
Venue
Mineralogical Magazine
Published
2008-04
Volume
72
Issue
2
Pages
639-649
ISSN
  • 0026-461X (ISSN-L)
  • 1471-8022
OpenAlex
W1980470118
Cited by
94
References
42
Citations by year
2026: 6 · 2025: 6 · 2024: 5 · 2023: 1 · 2022: 5 · 2021: 2 · 2020: 4 · 2019: 3 · 2018: 6 · 2017: 5 · 2016: 2 · 2015: 8 · 2014: 9 · 2013: 8 · 2012: 8
FWCI
5.46
Type
journal article
Language
en
Open access
closed
Locations
Mineralogical Magazine (publishedVersion)
Funders
Engineering and Physical Sciences Research Council (EP/F02777X/1)
Topics
  • Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Environmental Science › Environmental Engineering › Microbial Applications in Construction Materials
Keywords
pedogenic carbonates, atmospheric CO2 sequestration, root exudates, organic acid anions, bicarbonate, calcium availability, mineral weathering, calcium silicate minerals, soil carbon sink, soil organic carbon

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