CO2-removal News

Peer-reviewed Publications

Jia et al. (2025): Magnetic-Induced Swing Adsorption Using Fe₃O₄/SBA-15-PEI for Rapid and Energy-Efficient Direct Air Capture

Xiaohao Jia, Kyle Newport, Ali A. Rownaghi, Fateme Rezaei, IN: ACS Applied Materials & Interfaces, https://doi.org/10.1021/acsami.5c15078

Direct air capture (DAC) represents a critical negative emission technology for mitigating rising atmospheric CO₂ levels. However, conventional DAC systems relying on temperature swing adsorption (TSA) often suffer from slow heating/cooling rates and high energy consumption. In this work, the authors developed Fe₃O₄/SBA-15-PEI, synthesized via co-precipitation and impregnation, and applied for the first time in magnetic-induced swing adsorption (MISA) under DAC conditions.

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Peer-reviewed Publications

Maslouski et al. (2025): Long-term carbon dioxide removal potential from the application of wood biochar and basanite rock powder in sandy soil using the LiDELSv2 process-based modeling approach

Mikita Maslouski, Maria Ansari, Susanne E Hamburger, Johannes Meyer zu Drewer, Nikolas Hagemann, Annette Eschenbach, Christian Beer, Joscha N Becker, Claudia I Kammann, Maria-Elena Vorrath and Philipp Porada, IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/ae21f6

The rise in atmospheric carbon dioxide (CO₂) concentrations requires scalable and effective carbon dioxide removal (CDR) strategies. pyrogenic carbon capture and storage relies on the pyrolysis of biomass and the non-oxidative use of biochar, e.g. in soils. Enhanced rock weathering (ERW) captures CO₂ by forming dissolved bicarbonate. In addition to CDR, both methods may offer soil improvement as a co-benefit. However, their interaction and combined CDR potential remain largely unexplored. Here, the authors investigate their individual and combined effects on carbon dynamics in a temperate agricultural soil. Using the process-based LiDELSv2 model calibrated against data from the lysimeter experiment, they simulate 1000 year impacts of applying 4.2 wt% wood biochar, 2 wt% basanite rock powder (RP), their co-application, and co-pyrolyzed material (rock-enhanced biochar, RE-biochar) on soil organic carbon (SOC), net primary production (NPP), net CO₂ ecosystem exchange (NEE), and calcium (Ca²⁺) leaching in a northern German sandy soil.

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Peer-reviewed Publications

Leta et al. (2025): Evaluation of selected grass species for soil and water conservation, and carbon sequestration under farmland at Jimma Zone, southwestern Ethiopia

Leta Hailu, Gizaw Tesfaye, Wondimagegn Teka, Yalemstehay Debebe, Adugna Bayata, IN: Frontiers in Sustainable Food Systems, https://doi.org/10.3389/fsufs.2025.1552901

The objective of this study was to evaluate the effects of different grass species on soil and water conservation and carbon sequestration at a farmland in Jimma, Ethiopia. The experiment was set out as a randomized complete block design with three replications. The treatments were vetiver grass (Chrysopogon zizanioides L.), Desho grass (Pennisetum pedicellatum), Phalaris grass (Phalaris arundinacea L.) hedgerows, and the control (plots without grass). Soil erosion monitoring pins were installed, and the data were collected every 15 days. Soil samples were collected at 20 cm intervals in the top 100 cm before the grass hedgerows‘ establishment and after harvesting seasons in December (2016–2019 G.C.). Fresh and oven-dry matter biomass (shoot and root) data were measured. The collected soil samples and grass biomass analysis for carbon fraction were determined following Black and Wakely (1934) and the loss on ignition standard procedure methods, respectively. Pin heights and soil moisture data were analyzed using R software.

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Peer-reviewed Publications

Scholz et al. (2025): Natural ocean alkalinization through erosion of glacial till and weathering at the seafloor

Florian Scholz, Janine Börker, Christoph Vogt, Jens Hartmann and Klaus Wallmann, IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-03009-2

The ocean absorbs about 25% of anthropogenic carbon dioxide emissions, with this uptake regulated by acid-neutralizing anions collectively termed alkalinity. Most seawater alkalinity originates from the weathering of aluminosilicate and carbonate minerals on land, whose dissolved products are transported to the ocean by rivers, a slow process that causes carbon dioxide removal to lag behind emissions. Here the authors present geochemical evidence showing that fine-grained glacial sediments mobilized by coastal erosion undergo rapid seafloor weathering.

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Peer-reviewed Publications

Hailu et al. (2025): Evaluation of selected grass species for soil and water conservation, and carbon sequestration under farmland at Jimma Zone, southwestern Ethiopia

Leta Hailu, Gizaw Tesfaye, Wondimagegn Teka, Yalemstehay Debebe and Adugna Bayata, IN: Frontiers in Sustainable Food Systems, https://doi.org/10.3389/fsufs.2025.1552901

The objective of this study was to evaluate the effects of different grass species on soil and water conservation and carbon sequestration at a farmland in Jimma, Ethiopia.

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Peer-reviewed Publications

Maslouski et al. (2025): Long-term carbon dioxide removal potential from the application of wood biochar and basanite rock powder in sandy soil using the LiDELSv2 process-based modeling approach

Mikita Maslouski, Maria Ansari, Susanne E Hamburger, Johannes Meyer zu Drewer, Nikolas Hagemann, Annette Eschenbach, Christian Beer, Joscha N Becker, Claudia I Kammann, Maria-Elena Vorrath and Philipp Porada, IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/ae21f6

The rise in atmospheric carbon dioxide (CO₂) concentrations requires scalable and effective carbon dioxide removal (CDR) strategies. pyrogenic carbon capture and storage relies on the pyrolysis of biomass and the non-oxidative use of biochar, e.g. in soils. Enhanced rock weathering (ERW) captures CO₂ by forming dissolved bicarbonate. In addition to CDR, both methods may offer soil improvement as a co-benefit. However, their interaction and combined CDR potential remain largely unexplored. Here, the authors investigate their individual and combined effects on carbon dynamics in a temperate agricultural soil.

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Peer-reviewed Publications

Coggon et al. (2025): A geological carbon cycle sink hosted by ocean crust talus breccias

Rosalind M. Coggon, Elliot J. Carter, Lewis J. C. Grant, Aled D. Evans, Christopher M. Lowery, Damon A. H. Teagle, Pamela D. Kempton, Matthew J. Cooper, Claire M. Routledge, Elmar Albers, Justin Estep, Gail L. Christeson, Michelle Harris, Thomas M. Belgrano, Jason B. Sylvan, Julia S. Reece, Emily R. Estes and Trevor Williams on behalf of The South Atlantic Transect IODP Expedition 390 & 393 Scientists, IN: Nature Geoscience, https://doi.org/10.1038/s41561-025-01839-5

Calcium carbonate precipitation in ageing ocean crust sequesters carbon dioxide dissolved in seawater through seafloor weathering reactions, influencing atmospheric CO₂ concentrations on million-year timescales. However, this crustal carbon sink, and the extent it balances CO₂ degassing during crustal formation at mid-ocean ridges, remain poorly quantified due to limited sampling of the vast ridge flanks where CO₂ uptake continues for millions of years. Here the authors quantify the carbon sink hosted within talus breccias that accumulated through mass wasting 61 million years ago during rift faulting at the slow spreading Mid-Atlantic Ridge, cored during International Ocean Discovery Program South Atlantic Transect Expedition 390.

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Peer-reviewed Publications

Zhai et al. (2025): Long-term electrochemical carbon capture from diverse CO₂ sources with a recirculation mode

Yanjie Zhai, Shanhe Gong, Weisong Li, Qing Xia, Tingting Li, Jianyu Guan, Shao-Yuan Leu, Zhen-Yu Wu, Shu Ping Lau and Xiao Zhang, IN: Nature Communications, https://doi.org/10.1038/s41467-025-65332-8

Electrochemical carbon capture offers a sustainable pathway for carbon management, yet current systems are hindered by low concentration of atmospheric carbon dioxide (CO₂), resulting in inefficiencies and limited stability. Here, the authors develop an electrochemical system employing a modular porous solid electrolyte (PSE) reactor for continuous, scalable carbon capture from diverse sources, including ambient air and flue gas, while regenerating high-purity CO₂ (>99%) without additional chemical input through a recirculation mode.

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Peer-reviewed Publications

Li et al. (2025): Net carbon dioxide sequestration by large alkaline lakes dominates the carbon exchange of Qinghai–Tibet Plateau lakes

Yang Li, Genxu Wang, Shouqin Sun, Ruiying Chang, Tao Wang, Zhaoyong Hu, Fenglin Xu, Yi Yang and Chunlin Song, IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02884-z

Alpine lakes on the Qinghai-Tibet Plateau (QTP) are rapidly expanding under climate change, yet their role in the regional carbon budget remains unclear. Here the authors analyze carbon flux data from 156 alpine lakes of varying sizes and find that these lakes acted as a net carbon sink of 6.7 Tg C yr−1 during 2011–2022, approximately one-fifth of the terrestrial carbon sink over the QTP.

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Peer-reviewed Publications

Wang et al. (2025): Mapping innovations in direct air capture: A systematic patent review and literature comparison

Junyao Wang, Runkai Chen, Chao Huang, Zhaoyu Guo, Jian Song, Song He, Yawen Zheng, Shuai Deng, Ying Chen, Yongzhen Wang, Xiangkun Elvis Cao and Shuangjun Li, IN: Renewable and Sustainable Energy Reviews, https://doi.org/10.1016/j.rser.2025.116491

Direct air capture (DAC) technologies are gaining increasing attention in both academic and industrial sectors as an essential negative emission technology (NET) in meeting climate change targets. To advance DAC research, this study presents a comprehensive review of DAC technologies from a patent perspective, aiming to understand its current status, future technological trends, and market opportunities. Through two rounds of rigorous screening, 367 patents were finalized and categorized into four sub-technological groups for further analysis: liquid absorption-based DAC, solid adsorption-based DAC, emerging DAC technologies, and DAC integration and application.

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