Kathleen B. Aviso, Maria Victoria Migo-Sumagang, Czarina Alessandra Ramos, Raymond R. Tan IN: Chemical Engineering Transactions, DOI: 10.3303/CET24114092
In this work, the potential economic effects of large-scale basalt-enhanced weathering in the Philippines are estimated using input-output analysis.
Humphrey Adun, Jeffrey Dankwa Ampah, Olusola Bamisile, Yihua Hu, Iain Staffell, Haris R. Gilani IN: Communications Earth & Environment, https://doi.org/10.1038/s43247-024-01916-4
The authors quantify how different carbon removal methods and their deployment timing affect achieving net zero emissions by 2050 in the United States.
Chao Liu, Soon-Il An, Zixiang Yan, Soong-Ki Kim, Seungmok Paik IN: Communication Earth & Environment, https://doi.org/10.1038/s43247-024-01958-8
Here, the authors identify distinct hysteresis features in the precipitation-sea surface temperature sensitivity between strong El Niño and La Niña phases using a large ensemble carbon removal numerical simulation. The strong El Niño precipitation sensitivity exhibits a century-scale hysteretic enhancement and eastward shift, mainly due to modulated deep convection anomalies by the Intertropical Convergence Zone via cloud-longwave feedback.
Xing Wang, Guochen Li, Arshad Ali, Camelia Algora, Manuel Delgado-Baquerizo, Daniel S. Goll, Sara Vicca, Tongtong Xu, Boyuan Bi, Qiong Chen, Luxiang Lin, Yunting Fang, Zhanqing Hao, Zhenxin Li, Zuoqiang Yuan IN: Journal of Environmental Management, https://doi.org/10.1016/j.jenvman.2024.123477
The authors added wollastonite skarn, a calcium silicate rock, to soils in a rubber plantation in Yunnan, China, as part of an ERW strategy aimed at promoting soil functioning and biodiversity. Statistical significance was determined using a linear mixed-effects model, with p-values indicating the level of significance. The addition of wollastonite skarn significantly enhanced key ecosystem functions related to carbon, nitrogen, phosphorous, silicon, biodiversity, and pathogen control. However, it did not significantly affect soil enzyme activity. Some of these responses to the addition of wollastonite skarn may be associated with an increase in soil pH.
Sean Gip Lim, Yi Wei Daniel Tay, Suvash Chandra Paul, Junghyun Lee, Issam T. Amr, Bandar A. Fadhel, Aqil Jamal, Ahmad O. Al-Khowaiter, Ming Jen Tan IN: Carbon Capture Science & Technology, https://doi.org/10.1016/j.ccst.2024.100306
In this paper, the authors investigate the possibilities of in-situ carbon capture and sequestration to eliminate spatial constraints from a chamber confined curing solution via CO2 and steam integrated 3D concrete printing. The presented technology involves a two-step extrusion-based system that sequesters captured CO2 directly into concrete prior deposition at the nozzle printhead, so as to achieve artificially accelerated carbonation reactions with enhancement of mechanical properties.
Ian M. Power, Victoria N.J. Hatten, Minger Guo, Zivi Schaffer, Kwon Rausis, Heather Klyn-Hesselink IN: Frontiers in Climate, doi: 10.3389/fclim.2024.1510747
Here, the authors aim to contribute to the discussion of CDR quantification by describing three potential pitfalls relating to the geochemical and mineralogical composition of rock powders. First, rock powders used for ERW are often mineralogically complex and may initially exhibit fast dissolution rates due to reactive surfaces and phases, leading to overestimating long-term CDR rates. Second, the dissolution of accessory carbonates within ERW rock powders will tend to dominate cation and dissolved inorganic carbon fluxes, which, if not identified, can be misconstrued as silicate weathering and overestimate CDR. Third, methods that rely on measuring cations may be prone to misinterpretation as cations will often not be balanced with dissolved inorganic carbon, e.g., during strong acid weathering.
Laura Marín-Samper, Javier Arístegui, Nauzet Hernández-Hernández, Ulf Riebesell IN: Biogeosciences, https://doi.org/10.5194/bg-21-5707-2024
This study contributes to the inaugural exploration of non-equilibrated ocean alkalinity enhancement (OAE). Total alkalinity (TA) was manipulated, with silicate- and calcium-based ΔTA gradients ranging from 0 to 600 µmol L−1, without prior CO2 sequestration, under natural conditions and at a mesocosm scale (∼ 60 m3). This manipulation led to a sustained increase in pH and a decrease in pCO2 throughout the experiment, as full natural equilibration through sea–air gas exchange did not occur. Implemented in a neritic system under post-bloom conditions, a midway mixing event was simulated.
Fabian J. Dickhardt, Michael P. Nitzsche, Simon Rufer, T. Alan Hatton, Kripa K. Varanasi IN: Environmental Science and Technology, https://doi.org/10.1021/acs.est.4c05721
In recent years, marine carbon removal technologies have gained attention as a means of reducing greenhouse gas concentrations. One family of these technologies is electrochemical systems, which employ Faradaic reactions to drive alkalinity-swings and enable dissolved inorganic carbon (DIC) removal as gaseous CO2 or as solid minerals. In this work, the authors develop a thermodynamic framework to estimate upper bounds on performance for Faradaic DIC removal systems.
Rey Harvey Suello, Daan Temmerman, Steven Bouillon, Zeinab Khalifeh, Marinka van Puijenbroek, Kelly Elschot, Ignace Pelckmans, Thorbjørn Joest Andersen, Chris Smit, Jan Bakker, Stijn Temmerman IN: Science of The Total Environment 958, 178075, https://doi.org/10.1016/j.scitotenv.2024.178075
Salt marshes are known as key ecosystems for nature-based climate mitigation through organic carbon sequestration into their sediment beds, but at the same time they are affected by accelerating sea level rise induced by climate warming. Consequently, an important question is how organic carbon accumulation rates (OCAR) of salt marshes will respond to future accelerating rates of relative sea level rise (RSLR). This study studies the OCAR over four decades at two nearby salt marsh sites in the Netherlands, with similar environmental conditions, but with different RSLR rates.
Lucas Desport, Carlos Andrade, Damien Corral, Sandrine Selosse IN: International Journal of Greenhouse Gas Control 141, 104280, https://doi.org/10.1016/j.ijggc.2024.104280
The cement industry possesses multiple options to decarbonize its operations, including material efficiency, energy efficiency, clinker content reduction, hydrogen utilization, bioenergy, and carbon capture and storage (CCS). By integrating bioenergy and CCS (BECCS), the industry could produce net-negative cement, surpassing the 2050 carbon neutrality pledge of the Global Cement and Concrete Association. In TIAM-FR, a bottom-up optimization model of the global energy system, the authors developed an explicit model of the global cement industry to analyze the potential contribution of BECCS to producing cleaner cement. The authors investigated the technical and policy conditions favorable to BECCS deployment and sustainability, considering different future biomass potentials, yields, rotation periods, and management costs.
