CO2-removal News

Peer-reviewed Publications

Guo et al. (2025): Effects of ocean alkalinity enhancement on plankton in the Equatorial Pacific

Jiaying A. Guo, Robert F. Strzepek, Zhongwei Yuan, Kerrie M. Swadling, Ashley T. Townsend, Eric P. Achterberg, Thomas J. Browning and Lennart T. Bach IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-025-02248-7

A critical knowledge gap is how ocean alkalinity enhancement could influence marine plankton communities. Here the authors conducted 19 shipbased experiments in the Equatorial Pacific, examining three prevalent alkaline substances (sodium hydroxide, olivine, and steel slag) and their effects on natural phytoplankton populations under realistic and moderate alkalinity enhancements.

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Peer-reviewed Publications

Felix Dörpmund (2025): Motivations and challenges for carbon dioxide removal development: empirical evidence from market practitioners

Felix Dörpmund IN: Environmental Research Letters, DOI: 10.1088/1748-9326/adcad4

The study explores the role of private companies in shaping the early CDR innovation ecosystem by conducting 79 interviews with senior practitioners (suppliers, purchasers / marketplaces, investors) actively involved in CDR markets. Examining their motivations, the author finds themes that range from personal upbringing and caring for the following generations, to being catalytic in the creation of a new industry. All motivations are grounded in the recognition of CDR as an important component of global climate change mitigation. Identified challenges stretch across the categories of technology, organizations, policy and regulation, ecosystem, finances, and the public eye. This presents a complex picture, as all actors seek to solve a multi-faceted, concurrent coordination and scaling problem while dealing with a challenging set of uncertainties.

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Peer-reviewed Publications

Liu et al. (2025): Mineral‑fungal interactions in response to biochar amendment: implications for carbon storage in saline-alkali soil

Lu Liu, Mengmeng Chen, Jeroen Meersmans, Yuyi Li, Shirong Zhang & Xiaodong Ding IN: Plant and Soil, DOI: 10.1007/s11104-025-07360-3

Biochar application has been widely acknowledged as an environment-friendly practice to promote soil organic carbon (SOC) stabilization and sequestration in agroecosystems. However, the interaction between fungal and minerals on organic carbon storage and stabilization with biochar application still remains unclear in saline-alkaline soil. In the present research, this interaction has been studied by following 6 years treatments at an experimental farm: i) CK, without any fertilization; ii) NPK, only mineral fertilizer; iii) BC, 8.0 Mg ha−1 biochar-based NPK and iv) FeBC, 8.0 Mg ha−1 Fe modified biochar-based NPK, respectively.

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Peer-reviewed Publications

Science – Liang et al. (2025): Climate mitigation potential for targeted forestation after considering climate change, fires, and albedo

Shijing Liang, Alan D. Ziegler, Peter B. Reich, Kai Zhu, Dashan Wang, Xin Jiang, Deliang Chen, Philippe Ciais and Zhenzhong Zeng IN: Science Advances, doi.org/10.1126/sciadv.adn7915

The carbon sequestration potential of afforestation and reforestation remains uncertain in satellite-based assessments, particularly when accounting for dynamic climate conditions, vegetation-climate feedback, fire-dominated disturbance, and the trade-offs associated with surface albedo changes. Leveraging a coupled Earth system model, the authors estimated the global forestation mitigation during 2021–2100 under a sustainable shared socioeconomic pathway.

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Peer-reviewed Publications

Ren et al. (2025): Study on Carbon Removal from Coal Gangue to Purify Kaolin by Flotation with Different Collectors

Xiaoling Ren, Xinqian Shu, Yue Wu and Andong Yu IN: ACS Omega, https: //doi.org/10.1021/acsomega.5c00123

In order to explore the effects of carbon chain length of nonpolar saturated hydrocarbons and the type of polar groups on coal gangue flotation, five saturated hydrocarbons with different carbon chain lengths and seven hydrocarbons and hydrocarbon derivatives with different groups were selected for flotation.

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Peer-reviewed Publications

Nature – Liu et al. (2025): Enhanced vegetation productivity driven primarily by rate not duration of carbon uptake

Zunchi Liu, Philippe Ciais, Josep Peñuelas, Jianyang Xia, Sha Zhou, Yao Zhang and Yongshuo H. Fu IN: Nature Climate Change, https://doi.org/10.1038/s41558-025-02311-3

Using satellite and carbon-flux data, the autors analyse the duration and mean daily rate of carbon uptake (GPPrate) which have both increased in recent decades.

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Peer-reviewed Publications

Yan et al. (2025): Marine ranching enhances ecosystem stability and biological carbon sequestration potential: Insights from Ecopath with Ecosim (EwE) model simulation of 30-year ecological path of a national marine ranching in China

Jiale Yan, Yan Chen, Yingkun Cao, Jiamin Sun, Bin Wen, Xiaowei Gao,Gang Wang, Lixin Gong, Huixin Liu, Qian Li, Xiujin Liu, Jiabo Zhang, Zepeng Li, Futang Ma, Haien Zhang, Weidong Li, Zhe Pan IN: Aquaculture and Living Resources , DOI: 10.3389/fmars.2025.1583896

This study took the Haizhidu marine ranching in the Bohai sea of China as the research object, constructed 20 functional groups in the area, and used the ecosystem model Ecopath with Ecosim (EwE) and stable isotopes (δ 13 C and δ 15 N) to model the system, evaluate the biological structure, energy transfer efficiency, and ecological carrying capacity (ECC) of different functional groups in the system, and calculate the carbon sequestration potential when shellfish reach ECC and the impact of marine ranching construction on system stability and maturity.

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Peer-reviewed Publications

Nature – Weng & Cowie (2025): Estimates vary but credible evidence points to gigaton-scale climate change mitigation potential of biochar

Zhe Han Weng, Annette L. Cowie IN: Nature – communications earth & environment, DOI: 10.1038/s43247-025-02228-x

The authors reviewed the contributions of biochar to CO2 removal and greenhouse gas emissions reduction. They conclude that new assessments are needed, utilising integrated assessment models that incorporate latest understanding of biochar processes and feedstock availability.

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Peer-reviewed Publications

Chela & Selosse (2025): The co-benefits of integrating carbon dioxide removal in the energy system: A review from the prism of natural climate solutions

Sophie Chlela, Sandrine Selosse IN: Science of The Total Environment, DOI: 10.1016/j.scitotenv.2025.179271

Climate change mitigation necessitates rapid reductions in greenhouse gas emissions and the removal of residual atmospheric CO2. However, among the solutions, Carbon Dioxide Removal (CDR) methods—especially Natural Climate Solutions (NCS)—are gaining attention. In this review, the authors explore how the energy system, a major contributor to climate change, can integrate these solutions. Thus, they present different Carbon Dioxide Removal (CDR) highlighting the role of Natural Climate Solutions (NCS) while determining their link to the energy system using biomass as renewable energy source through Bioenergy Carbon Capture and Storage.

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Peer-reviewed Publications

Sandhaas & Hartma (2025): Pyrolysis as a strategic element in energy system transformation to achieve net zero emissions

Anna Sandhaas, Niklas Hartmann IN: Energy Conversion and Management: X, DOI: 10.1016/j.ecmx.2025.100970

This study evaluates pyrolysis as a dual-purpose technology for integrating negative emissions and dispatchable electricity into Germany’s power system, supporting climate neutrality by 2045. Using a myopic power system model, the authors assess the role of pyrolysis, which operates solely on residual biomass. By 2050, pyrolysis can reach an installed capacity of 5 GW, supplying 2 % of total electricity generation. Its flexible power output reduces the need for hydrogen storage by 60 %, as it generates electricity during low renewable supply periods and offsets CO2 emissions from gas-fired power plants through biochar sequestration. This enables continued gas plant operation without new investments while maintaining a net-negative CO2balance.

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