Schlagwort: Carbon Dioxide Removal

Dominik Keiner, Andreas Mühlbauer, Christoph Gerhards and Christian Breyer, IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/adccd9

If climate change mitigation is based on energy crops, the impact of carbon dioxide removal (CDR) on area demand may be significant. The CDR-specific area demand is usually not presented. This study compares a CDR technology portfolio prioritising biomass-based solutions to portfolios prioritising low cost, low energy demand, high security, low area demand, and high technology readiness in terms of area demand. The CDR portfolio model is linked with an energy system model to include the area required for solar photovoltaics and wind power for the energy supply of the whole energy–industry–CDR system.

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Joseph J. Lee, Luke Plante, Brooke Pian, Sabrina Marecos, Sean A. Medin, Jacob D. Klug, Matthew C. Reid, Greeshma Gadikota, Esteban Gazel & Buz Barstow, IN: Scientific Reports, https://doi.org/10.1038/s41598-025-99655-9

Ultramafic rocks are an abundant source of cations for CO₂ mineralization (e.g., Mg) and elements for sustainability technologies (e.g., Ni, Cr, Mn, Co, Al). However, there is no industrially useful process for dissolving ultramafic materials to release cations for CO₂ sequestration or mining them for energy-critical elements. Weathering of ultramafic rocks by rainwater, release of metal cations, and subsequent CO₂ mineralization already naturally sequesters CO₂ from the atmosphere, but this natural process will take thousands to hundreds of thousands of years to remove excess anthropogenic CO₂, far too late to deal with global warming that will happen over the next century. Mechanical acceleration of weathering by grinding can accelerate cation release but is prohibitively expensive. In this article the authors show that gluconic acid-based lixiviants produced by the mineral-dissolving microbe Gluconobacter oxydansaccelerate leaching of Mg²⁺ by 20× over deionized water, and that leaching of Mg, Mn, Fe, Co, and Ni further improves by 73% from 24 to 96 h.

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Julia A. Davis, Nafiseh Salehi, Liqing Li & Majid Shafiee-Jood IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02295-0

Carbon capture and storage and carbon dioxide removal technologies are pivotal for net-zero climate goals, requiring extensive carbon dioxide pipeline expansion across the U.S. However, as this network grows, concerns about safety and environmental justice intensify, due to insufficient regulations that may disproportionately expose marginalized communities to risks. Here, the authors empirically examine the environmental justice implications of existing and potential pipelines across communities. Using census-tract demographic data and pipeline spatial data, they applied LASSO regression to identify key demographic variables and incorporated them into binary logistic regression models to uncover if the locations of, and disadvantages associated with, carbon dioxide pipelines are equally distributed among different demographics.

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Baala H. Anandapadmanaban, Yen San Chan, Chi-Wen Lin and Shu-Hui Liu IN: Springer Nature, https://doi.org/10.1007/s10668-025-06187-3

This review emphasizes the substantial progress in producing biochar from waste materials and its contribution to CO₂ sequestration, thereby mitigating the environmental impact.