CO₂-removal News

Abdalqadir et al. (2024): A state of the art of review on factors affecting the enhanced weathering in agricultural soil: strategies for carbon sequestration and climate mitigation

Mardin Abdalqadir, David Hughes, Sina Rezaei Gomari, Ubaid Rafiq IN: Environmental Science and Pollution Research, https://doi.org/10.1007/s11356-024-32498-5

Enhanced weathering represents an approach by leveraging the natural process of rock weathering to sequester atmospheric carbon dioxide in agricultural lands. This review synthesizes current research on EW, focusing on its mechanisms, influencing factors, and pathways for successful integration into agricultural practices.

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Singh et al. (2024): Carbon farming: a circular framework to augment CO2 sinks and to combat climate change

Shalini Singh, Boda Ravi Kiran, S. Venkata Mohan IN: Environmental Science Advances, https://doi.org/10.1039/D3VA00296A

Confronting climate change and meeting the 1.5 °C target set by the Conference of Parties requires the implementation of long-term carbon-sink measures. Carbon farming is a scalable, cost-effective, and efficient approach to achieving negative emissions that aligns with the larger goals of sustainability and climate resilience.

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Li et al. (2024): Integration of Carbon Dioxide Removal (CDR) Technology and Artificial Intelligence (AI) in Energy System Optimization

Guanglei Li, Tengqi Luo, Ran Liu, Chenchen Song, Congyu Zhao, Shouyuan Wu, Zhengguang Liu IN: Processes 12(2), 402, https://doi.org/10.3390/pr12020402

In response to the urgent need to address climate change and reduce carbon emissions, there has been a growing interest in innovative approaches that integrate AI and CDR technology. This article provides a comprehensive review of the current state of research in this field and aims to highlight its potential implications with a clear focus on the integration of AI and CDR. Specifically, this paper outlines four main approaches for integrating AI and CDR: accurate carbon emissions assessment, optimized energy system configuration, real-time monitoring and scheduling of CDR facilities, and mutual benefits with mechanisms. 

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Weber et al. (2024): Chemistry-albedo feedbacks offset up to a third of forestation’s CO2 removal benefits

James Weber, James A. King, Nathan Luke Abraham, Daniel P. Grosvenor, Christopher J. Smith, Youngsub Matthew Shin, Peter Lawrence, Stephanie Roe, David J. Beerling, Maria Val Martin IN: Science 383, 860-864, https://doi.org/10.1126/science.adg6196

Forestation is widely proposed for CDR, but its impact on climate through changes to atmospheric composition and surface albedo remains relatively unexplored. The authors assessed these responses using two Earth system models by comparing a scenario with extensive global forest expansion in suitable regions to other plausible futures.

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Beerling et al. (2024): Enhanced weathering in the US Corn Belt delivers carbon removal with agronomic benefits

David J. Beerling, Dimitar Z. Epihov, Ilsa B. Kantola, Michael D. Masters, Tom Reershemius, Noah J. Planavsky, Christopher T. Reinhard, Jacob S. Jordan, Sarah J. Thorne, James Weber, Maria Val Martin, Robert P. Freckleton, Sue E. Hartley, Rachael H. James, Christopher R. Pearce, Evan H. DeLucia, Steven A. Banwart IN: PNAS 121/9, e2319436121, https://doi.org/10.1073/pnas.2319436121

Terrestrial enhanced weathering of silicate rocks, such as crushed basalt, on farmlands is a promising scalable atmospheric carbon dioxide removal strategy that urgently requires performance assessment with commercial farming practices. The authors report findings from a large-scale replicated EW field trial across a typical maize-soybean rotation on an experimental farm in the heart of the United Sates Corn Belt over 4 y (2016 to 2020). 

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Climate action: Council and Parliament agree to establish an EU carbon removals certification framework

press release, Council of the EU, 20 February 2024

„Council and European Parliament negotiators reached a provisional political agreement today on a regulation to establish the first EU-level certification framework for for permanent carbon removals, carbon farming and carbon storage in products . The voluntary framework is intended to facilitate and speed up the deployment of high-quality carbon removal and soil emission reduction activities in the EU. Once entered into force, the regulation will be the first step towards introducing a comprehensive carbon removal and soil emission reduction framework in EU legislation and contribute to the EU’s ambitious goal of reaching climate neutrality by 2050, as set out in the European climate law.“

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Hiles et al. (2024): UAV approaches for improved mapping of vegetation cover and estimation of carbon storage of small saltmarshes: examples from Loch Fleet, northeast Scotland

William Hiles, Lucy C. Miller, Craig Smeaton, and William E. N. Austin IN: Biogeosciences, https://doi.org/10.5194/bg-21-929-2024

Saltmarsh environments are recognised as key components of many biophysical and biochemical processes at the local and global scale. Accurately mapping these environments, and understanding how they are changing over time, is crucial for better understanding these systems. However, traditional surveying techniques are time-consuming and are inadequate for understanding how these dynamic systems may be changing temporally and spatially. The development of uncrewed aerial vehicle (UAV) technology presents an opportunity for efficiently mapping saltmarsh extent. Here the authors develop a methodology which combines field vegetation surveys with multispectral UAV data collected at two scales to estimate saltmarsh area and organic carbon storage at three saltmarshes in Loch Fleet (Scotland).

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Wang et al. (2024): High Gravity-Enhanced Direct Air Capture: A Leap Forward in CO2 Adsorption Technology

Shufei Wang, Youzhi Liu, Chengqian Zhang, Shuwei Guo, Yuliang Li IN: Atmosphere, 15(2), 238, https://doi.org/10.3390/atmos15020238

This study aims to innovate Direct Air Capture (DAC) technology by utilizing the ultrasonic impregnation method to load Tetraethylenepentamine (TEPA) onto alumina (Al2O3) as the adsorbent. Furthermore, high gravity adsorption technology is integrated to significantly enhance the efficiency of DAC. Characterization tests, including BET, FTIR, TG, XRD, and SEM-EDS, confirm the structural stability and high capture capacity of the adsorbent. Additionally, this study demonstrates the rapid and efficient capture of CO2 from the air using TEPA-Al2O3 adsorbent under high gravity conditions for the first time.

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Barnes et al. (2024): A Century of Reforestation Reduced Anthropogenic Warming in the Eastern United States

Mallory L. Barnes, Quan Zhang, Scott M. Robeson, Lily Young, Elizabeth A. Burakowski, A. Christopher. Oishi, Paul C. Stoy, Gaby Katul, Kimberly A. Novick IN: Earth’s Future, https://doi.org/10.1029/2023EF003663

In addition to regulating atmospheric carbon dioxide concentrations, forests modify surface and near-surface air temperatures through biophysical processes. In the eastern United States (EUS), widespread reforestation during the 20th century coincided with an anomalous lack of warming, raising questions about reforestation’s contribution to local cooling and climate mitigation. Using new cross-scale approaches and multiple independent sources of data, the authors uncovered links between reforestation and the response of both surface and air temperature in the EUS.

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Osman et al. (2024): Life cycle assessment and techno-economic analysis of sustainable bioenergy production: a review

Ahmed I. Osman, Bingbing Fang, Yubing Zhang, Yunfei Liu, Jiacheng Yu, Mohamed Farghali, Ahmed K. Rashwan, Zhonghao Chen, Lin Chen, Ikko Ihara, David W. Rooney, Pow-Seng Yap IN: Environmental Chemistry Letters, https://doi.org/10.1007/s10311-023-01694-z

Life cycle assessments beyond greenhouse gas emissions and energy balance are essential, along with the standardization of assessment methodologies to enable meaningful comparisons. Here, the authors review life cycle assessment, chemical aspects, and policy implication of bioenergy production. They discuss life cycle assessment in terms of concepts, methods, impacts, greenhouse gases, land use, water consumption, bioethanol, biodiesel, biogas, and techno-economic analysis. Chemical aspects comprise reaction processes and means to improve efficiency. Concerning policies, tools, and frameworks that encourage sustainable energy production are presented.

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