Bach, Lennart T.; Gill, Sophie J.; Rickaby, Rosalind E. M.; Gore, Sarah; Renforth, Phil (2019): CO2 Removal With Enhanced Weathering and Ocean Alkalinity Enhancement: Potential Risks and Co-benefits for Marine Pelagic Ecosystems. In Front. Clim. 1, p. 7. DOI: 10.3389/fclim.2019.00007.

"Humankind will need to remove hundreds of gigatons of carbon dioxide (CO₂) from the atmosphere by the end of the twenty-first century to keep global warming below 2°C within the constraints of the global carbon budget. However, so far it is unclear if and how this could be achieved."

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Deadline: 1. March 2019

"It is clear that Negative Emission Technologies (NETs) can never be a wholesale replacement for reducing emissions but may be useful in displacing some energy/emission intensive sectors. It is unlikely that a single NETs proposal can be scaled sufficiently to meet this demand, and a portfolio of approaches may be more feasible. The primary removal methods of focus in this research topic of Frontiers in Climate will include all negative emissions strategies that directly mitigate climate change."

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Xiong, Wei; Wells, Rachel K.; Horner, Jake A.; Schaef, Herbert T.; Skemer, Philip A.; Giammar, Daniel E. (2018): CO2 Mineral Sequestration in Naturally Porous Basalt. In Environ. Sci. Technol. Lett. 5 (3), pp. 142–147. DOI: 10.1021/acs.estlett.8b00047.

"We experimentally investigated mineral carbonation in whole core samples retrieved from the Grand Ronde basalt, the same formation into which ∼1000 t of CO₂ was recently injected in an eastern Washington pilot-scale demonstration. The rate and extent of carbonate mineral formation at 100 °C and 100 bar were tracked via time-resolved sampling of bench-scale experiments. Basalt cores were recovered from the reactor after 6, 20, and 40 weeks, and three-dimensional X-ray tomographic imaging of these cores detected carbonate mineral formation in the fracture network within 20 weeks."

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"Farming crops with crushed rocks could help to improve global food security and capture CO2 from the atmosphere, a new study has found. The pioneering research by scientists at the University of Sheffield together with international colleagues suggests that adding fast-reacting silicate rocks to croplands could capture CO2 and give increased protection from pests and diseases while restoring soil structure and fertility."

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