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Niveditha & Palanisamy (2025): Upcycling iron-rich industrial waste into a carbon-sequestering composite binder through optimized carbonation curing for structural applications

Niveditha M. and Palanisamy T., IN: International Journal of Environmental Studies, https://doi.org/10.1080/15623599.2025.2556259

Background: Steel production generates large quantities of mill scale, a by-product rich in iron oxides, with global generation estimated at 13.5 million tons annually. Simultaneously, Portland cement production, essential for concrete, contributes nearly 8% of global CO₂ emissions, highlighting the urgent need for low-carbon alternatives. Iron carbonate (FeCO₃), typically regarded as a corrosion product, offers an underexplored opportunity for deliberate synthesis in binders to achieve both structural performance and CO₂ sequestration. Repurposing mill scale into carbon-sink binders thus provides a dual pathway for waste valorization and climate change mitigation, while advancing circular economy and industrial symbiosis principles. Methods: A composite binder was developed using mill scale, fly ash, metakaolin, and limestone, with oxalic acid employed as a chelating agent to promote iron dissolution and carbonate formation.

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Peer-reviewed Publications

Müller-Hansen et al. (2025): Technology, geography and collaboration networks: assessing global innovation and research funding patterns for carbon removal

Finn Müller-Hansen, Livia Fritz, Sarah Lück, Benjamin K Sovacool and Jan C Minx, IN: Environmental Research Communications, https://doi.org/10.1088/2515-7620/ae0099

A comprehensive view of research and innovation dynamics is crucial for the rigorous assessment of the potentials of CDR options and for guiding strategies to close knowledge gaps. Here, the authors investigate funding patterns in CDR research across time, geographies and fields of research and identify key organizations and actors in collaboration networks. They use comprehensive search queries and machine learning to identify more than 6000 research grants on twelve different CDR options.

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Peer-reviewed Publications

Neubert & Oschatz (2025): Future Perspective On Materials, Electrochemistry, and Cell Concepts for Redox-Mediated CO₂ Direct Air Capture Scenarios

Tilmann J. Neubert and Martin Oschatz, IN: Chemistry – A European Journal, https://doi.org/10.1002/ceur.202500236

Direct air capture (DAC) of CO₂ has emerged as a complementary mitigation strategy. However, current DAC technologies are limited by the high energy requirements inherent to the thermal release of captured CO₂, which are caused by the low thermodynamic efficiency of heat-driven processes, as constrained by Carnot principles. Redox-mediated electrochemical carbon capture (RMECC) offers a promising pathway to overcome these limitations. RMECC with DAC application remains in an early developmental stage and requires further optimization to enable energy-efficient, cost-effective, and scalable deployment. In this perspective the design of sorbents, electrolytes, and electrochemical cell configurations in the field of RMECC are discussed with an emphasis on sustainable approaches for the demands of DAC applications.

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Peer-reviewed Publications

Zhang et al. (2025): Ecological carrying capacity and carbon sequestration potential of Ruditapes philippinarum: A case study in Dashentang National Marine Ranch in Tianjin Bohai Bay, China

Yue Zhang, Debin Zheng, Yongjun Guo, Shuang Liang, Biao Guo and Muhan Li, IN: Frontiers in Marine Science, https://doi.org/10.3389/fmars.2025.1640824

As an ecologically and economically significant bivalve species, the Ruditapes philippinarum plays a vital role in carbon sequestration and marine ecosystem restoration. However, its ecological carrying capacity and carbon sequestration potential remain relatively underexplored. In this study, the authors further incorporated carbon budget estimation, Mixed Trophic Impact (MTI) analysis, and pedigree analysis to provide a comprehensive system-wide evaluation.

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Peer-reviewed Publications

Cowie et al. (2025): Quantifying Climate Change Effects of Bioenergy and BECCS: Critical Considerations and Guidance on Methodology

Annette Cowie, Kati Koponen, Anthony Benoist, Göran Berndes, Miguel Brandão, Leif Gustavsson, Patrick Lamers, Eric Marland, Sebastian Rüter, Sampo Soimakallio, David Styles, IN: GCB Bioenergy, https://doi.org/10.1111/gcbb.70070

Climate impacts of bioenergy depend on case-specific factors, primarily biophysical features of the biomass production system, and the design and efficiency of conversion and capture processes. Estimates of climate impacts are also strongly affected by methodological choices and assumptions, and much of the divergence between studies derives from differences in the assumed alternate use of the land or feedstock, the alternate energy source and the system boundaries applied. The authors present a methodology to support robust estimates of the climate change effects of bioenergy systems, updating the standard methodology developed by the International Energy Agency’s Technology Collaboration Program on Bioenergy.

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Peer-reviewed Publications

Enebe et al. (2025): The impacts of biochar on carbon sequestration, soil processes, and microbial communities: a review

Matthew C. Enebe, Ram L. Ray and Richard W. Griffin, IN: Carbon Research, https://doi.org/10.1007/s42773-025-00499-3

Biochar application to the soil is an eco-friendly and sustainable nature-based solution for promoting soil carbon sequestration. It facilitates the reduction in the microbial carbon mineralization rate. Additionally, biochar enhances soil aggregate formation, neutralizes soil acidity, and increases microbial diversity, composition, and functions. The method adopted for this qualitative review entails a detailed examination of various research studies published on the contributions of biochar to soil carbon sequestration, its effect on the microbial community, and its contribution to greenhouse gas emission suppression, while also examining the various key factors that influence biochar’s functional potential as well as biochar’s contribution to environmental sustainability.

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Peer-reviewed Publications

Nayak et al. (2025): Harnessing the potential of microalgae for carbon sequestration to achieve net-zero emissions

Sujit Kumar Nayak, Pratap Bhattacharyya, Soumya Ranjan Padhy, Anubhav Das, Shiva Prasad Parida, Monalisha Rath and Anweshita Nayak, IN: Mitigation and Adaptation Strategies for Global Change, https://doi.org/10.1007/s11027-025-10249-2

To combat these adverse environmental consequences, efforts should be made to mitigate climate change through carbon sequestration following a natural and sustainable approach. In this context, microalgae play an important role in carbon sequestration and climate change mitigation. They have higher carbon capture potential by converting the atmospheric CO₂ into biomass through photosynthesis. Further, algal biomass could be used for the production of biofuels, biochar, and other value-added products, offering green alternatives. This study presents an analytical framework by linking biological CO₂ fixation mechanisms with downstream valorization pathways and techno-economic evaluations.

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Peer-reviewed Publications

Ning et al. (2025): Carbon Sequestration and Forest Rotation Age: A Meta-Regression

Zhuo Ning, Van Chen and Changyou Sun, IN: Forest Ecosystems, https://doi.org/10.1007/s44391-025-00039-3

Forest carbon sequestration has gained global attention as an effective nature-based strategy for mitigating climate change, with optimal harvest rotation decisions directly affecting carbon storage outcomes. This meta-regression synthesizes 59 primary studies to assess the impact of economic, ecological, and methodological factors on forest rotation ages. Using weighted least squares (WLS), fixed-effects, and random-effects models, the authors find that the fixed-effects model offers the most robust estimates.

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Peer-reviewed Publications

Findlay et al. (2025): Perspectives on Marine Carbon Dioxide Removal from the Global Ocean Acidification Observing Network

Helen Findlay, Richard Feely, Kalina Grabb, Elizabeth Jewett, Elise Keister, Gabby Kitch, Yuri Artioli, Punyasloke Bhadury, Jeremy Blackford, Odile Crabeck, Anwesha Ghosh, Yaru Li, Kaitlyn Lowder, Shreya Mehta, Bryce Van Dam, Houda Beghoura, Noam Karo, Andrij Horodysky, Sebastian Hennige, Sally Salaah, IN: University of Edinburgh Research Portal, https://doi.org/10.5670/oceanog.2025.e308

Along with other carbon monitoring groups, the ocean acidification (OA) community has been observing, modeling, and projecting the impacts of changing carbonate chemistry for over two decades. The Global Ocean Acidification Observing Network (GOA-ON) has three key goals related to these issues: (1) improve understanding of global OA conditions, (2) improve understanding of ecosystem responses to OA, and (3) acquire and exchange data necessary to optimize modeling for OA and its impacts. GOA-ON and associated networks have a wealth of knowledge, data, models, and best practice guides on how to monitor global carbonate chemistry, and GOA-ON regional hubs collaborate at local scales to inform policy and action for coastal communities. Here, the GOA-ON community shares lessons learned relevant for marine carbon dioxide removal (mCDR) research and development. Understanding whether, how, and where mCDR approaches should be deployed will require knowledge of the carbonate system, robust observations, sensor technology, and modeling capacities.

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Peer-reviewed Publications

Peng et al. (2025): Quantifying and Optimizing Vegetation Carbon Storage in Building-Attached Green Spaces for Sustainable Urban Development

Wenjun Peng, Xinqiang Zou, Yanyan Huang and Hui Li, IN: Sustainability, https://doi.org/10.3390/su17178088

This study quantified vegetation carbon storage across three attached green space typologies (green square, roof garden, and sunken courtyard) at a representative public building in Wuhan, China, using field surveys and species-specific allometric equations.

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