Next Article in Journal
The Application of Building Physics in the Design of Roof Windows
Next Article in Special Issue
Carbon Dioxide Absorption by Blast-Furnace Slag Mortars in Function of the Curing Intensity
Previous Article in Journal
The Effects of Environmental Regulations on the Manufacturing Industry’s Performance: A Comparison of Green and Non-Green Sectors in Korea
Previous Article in Special Issue
Optimization of the Energy Consumption of a Carbon Capture and Sequestration Related Carbon Dioxide Compression Processes
Open AccessEditor’s ChoiceReview

Alkaline Mineral Soil Amendment: A Climate Change ‘Stabilization Wedge’?

School of Engineering, University of Guelph, 50 Stone Road East, Guelph, ON N1G 2W1, Canada
Author to whom correspondence should be addressed.
Energies 2019, 12(12), 2299;
Received: 10 May 2019 / Revised: 1 June 2019 / Accepted: 12 June 2019 / Published: 16 June 2019
(This article belongs to the Special Issue Carbon Capture, Storage and Utilization)
Extreme climate change due to heat-trapping gases, especially carbon dioxide, necessitates its mitigation. In this context, the carbon dioxide sequestration technology of enhanced weathering has for years been investigated, with a possible implementation strategy via alkaline mineral soil amendment being more recently proposed. Candidate materials for enhanced weathering include calcium and magnesium silicates, most notably those belonging to the olivine, pyroxene and serpentine groups of minerals, given their reactivity with CO2 and global availability. When these finely crushed silicate rocks are applied to the soil, the alkaline earth metal cations released during mineral weathering gradually react with carbonate anions and results in the formation of pedogenic carbonates, which, over time, and under the right conditions, can accumulate in the soil. This review paper critically reviews the available literature on alkaline mineral soil amendments and its potential to sequester enough CO2 to be considered a climate change ‘stabilization wedge’. Firstly, evidence of how agricultural soil can serve as a carbon sink in discussed, based on the observed accumulation of inorganic carbon in alkaline mineral-amended soils. Secondly, the impact of alkaline minerals on agricultural soil and crops, and the factors determining the rate of the weathering process are assessed. Lastly, the CO2 sequestration potential via alkaline mineral soil amendment is quantified according to an idealized shrinking core model, which shows that it has the potential to serve as a climate change stabilization wedge. View Full-Text
Keywords: carbon sequestration; climate change mitigation; alkaline minerals; enhanced weathering; soil amendment; stabilization wedge carbon sequestration; climate change mitigation; alkaline minerals; enhanced weathering; soil amendment; stabilization wedge
Show Figures

Figure 1

MDPI and ACS Style

Haque, F.; Chiang, Y.W.; Santos, R.M. Alkaline Mineral Soil Amendment: A Climate Change ‘Stabilization Wedge’? Energies 2019, 12, 2299.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop