Schlagwort: carbon sequestration

Qian et al. (2024): Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances

Rusheng Qian, Lin Wan-Wendner, Chengqi Yang, Ruze Zhao, Zhibo Ye, Deyu Kong, Yong Zhang IN: Journal of Building Engineering 90, 109453, https://doi.org/10.1016/j.jobe.2024.109453

Recycled coarse-aggregate (RCA) derived from waste concrete can be re-used for concrete preparation, which is now limited due to its drawbacks such as micro-cracks, high-porosity, and reduced concrete strengths. To remedy these deficiencies, carbon-sequestration was employed in this study to enhance RCA and the conditions were optimized, including the temperature (20 °C–40 °C), pressure (0.1 MPa–0.3 MPa), time (5 h–24 h) and initial water content (25%–75 %).

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Qian et al. (2024): Investigations on carbon-sequestration optimization of recycled coarse-aggregate and its effects on concrete performances

Rusheng Qian, Lin Wan-Wendner, Chengqi Yang, Ruze Zhao, Zhibo Ye, Deyu Kong, Yong Zhang IN: Journal of Building Engineering, 90, 109453, https://doi.org/10.1016/j.jobe.2024.109453

Recycled coarse-aggregate (RCA) derived from waste concrete can be re-used for concrete preparation, which is now limited due to its drawbacks such as micro-cracks, high-porosity, and reduced concrete strengths. To remedy these deficiencies, carbon-sequestration was employed to enhance RCA and the conditions were optimized, including the temperature (20 °C–40 °C), pressure (0.1 MPa–0.3 MPa), time (5 h–24 h) and initial water content (25%–75 %). There parameters were optimized based on the orthogonal test with scheme L9(34), which was evaluated based on RCA carbon-sequestration amount as well as its properties. With the optimized parameters, RCA was enhanced as CRCA. Both RCA and CRCA were utilized to fully replace natural coarse-aggregate (NCA) in concrete and concrete basic performances were investigated systematically, including strengths, shrinkage and medium transport properties. 

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Zhu et al. (2024): Sustainable carbon sequestration via olivine based ocean alkalinity enhancement in the east and South China Sea: Adhering to environmental norms for nickel and chromium

Tianqiang Zhu, Liwen Zheng, Feng Li, Jihua Liu, Wen Zhuang IN: Science of The Total Environment, 930, 172853, https://doi.org/10.1016/j.scitotenv.2024.172853

This study aims to evaluate the feasibility and potential of olivine-based ocean alkalinity enhancement (OAE) for the removal of atmospheric CO2 and its storage in seawater as bicarbonates in the East and South China Seas (ESCS). A particular focus is placed on the potential ecological impacts arising from the release of nickel (Ni) and chromium (Cr) during the olivine weathering process. The authors considered two extreme scenarios: one where Ni and Cr are entirely retained in seawater, and another where they are completely deposited in sediments.

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Nature – Ngidi et al. (2024): Response of Sorghum bicolor genotypes for yield and yield components and organic carbon storage in the shoot and root systems

Asande Ngidi, Hussein Shimelis, Seltene Abady, Sandiswa Figlan, Vincent Chaplot IN: Scientific Reports 14, 9499, https://doi.org/10.1038/s41598-024-59956-x

Sorghum is a vital food and feed crop in the world’s dry regions. Developing sorghum cultivars with high biomass production and carbon sequestration can contribute to soil health and crop productivity. The objective of this study was to assess agronomic performance, biomass production and carbon accumulation in selected sorghum genotypes for production and breeding.

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Nature – Yu et al. (2024): Maximizing carbon sequestration potential in Chinese forests through optimal management

Zhen Yu, Shirong Liu, Haikui Li, Jingjing Liang, Weiguo Liu, Shilong Piao, Hanqin Tian, Guoyi Zhou, Chaoqun Lu, Weibin You, Pengsen Sun, Yanli Dong, Stephen Sitch, Evgenios Agathokleous IN: Nature Communications, 15, https://doi.org/10.1038/s41467-024-47143-5

Forest carbon sequestration capacity in China remains uncertain due to underrepresented tree demographic dynamics and overlooked of harvest impacts. In this study, the authors employ a process-based biogeochemical model to make projections by using national forest inventories, covering approximately 415,000 permanent plots, revealing an expansion in biomass carbon stock by 13.6 ± 1.5 Pg C from 2020 to 2100, with additional sink through augmentation of wood product pool (0.6-2.0 Pg C) and spatiotemporal optimization of forest management (2.3 ± 0.03 Pg C). 

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Dahai et al. (2024): The application of magical microalgae in carbon sequestration and emission reduction: Removal mechanisms and potential analysis

He Dahai, Yin Zhihong, Qin Lin, Li Yuhong, Tian Lei, Li Jiang, Zhu Liandong IN: Renewable and Sustainable Energy Reviews, 197, 114417, https://doi.org/10.1016/j.rser.2024.114417

Based on the current status of microalgae research and application, this review focuses on the intrinsic mechanism of microalgae carbon sequestration and emission reduction as well as the influencing factors of microalgae cultivation and growth and further explores the potential of microalgae carbon sequestration and emission reduction and its application in terms of carbon sequestration and emission reduction efficiency, economic feasibility and practical application. To solve the current challenges of microalgae carbon sequestration and emission reduction applications, it is proposed that the anti-pollution ability and carbon sequestration efficiency of microalgae can be improved through genetic engineering and the construction of suitable microalgae cultivation systems, combined with the wastewater and waste gas treatment and microalgae multi-product biorefinery to reduce the energy inputs and greenhouse gas emissions.

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Nature – Sun et al. (2024): Nature-based Solutions can help restore degraded grasslands and increase carbon sequestration in the Tibetan Plateau

Jian Sun, Yingxin Wang, Tien Ming Lee, Xiaowei Nie, Tao Wang, Eryuan Liang, Yafeng Wang, Lin Zhang, Jun Wang, Shilong Piao, Fahu Chen, Bojie Fu IN: Communications Earth & Environment5, https://doi.org/10.1038/s43247-024-01330-w

Here, the authors investigated the rationale and urgency behind the implementation of Nature-based Solutions on sequestering carbon using literature review and meta-analysis. They also project the changes in terrestrial carbon sink of Tibetan Plateau grassland ecosystems using model simulations with different future emissions scenario.

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Feng et al. (2024): Quantifying the environmental synergistic effect of cooling-air purification-carbon sequestration from urban forest in China

Rundong Feng, Shenghe Liu, Fuyuan Wang, Kaiyong Wang, Ping Gao, Linlin Xu IN: Journal of Cleaner Production, 448, 141514, https://doi.org/10.1016/j.jclepro.2024.141514

Urban forest is considered nature-based solution for mitigating the adverse impacts of climate change. However, large-scale quantification of urban forest synergistic effect is still limited. This study integrated multi-source remote sensing data, machine learning, and geospatial methods to quantify the synergistic effect (i.e., spatial interaction) of urban forest on urban heat island, PM2.5 concentration, and carbon stock and its driving mechanism in China.

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Shoaib et al. (2024): Estimating Phytosequestration Capacity And The Effect Of Environmental Pollution On Carbon Sequestration Of Some Plant Species And Its Chlorophyll Correlation

Affhan Shoaib, Aiman Sultan, Sana Minai, Sohaib Ahmed, M. Hashim Zuberi IN: Fuuast Journal Of Biology, 13, 2

Current work is focused on exploring carbon dioxide uptake by different methods of green biotechnology and how environmental pollution affects that uptake. The study examined how the relationship between environmental pollution and carbon sequestration can be optimized by the technique of green biotechnology which affects the overall plant health. For this purpose, leaves from twenty-six plant species including Michelia, Anona Squamosa, Catharantha roseus, Elaeis Guineenis, Hibiscus rosa sinensis, and Epipremnun pinnatum were taken and divided into two sets. One set was washed with water and the other one was left with dirt on it to demonstrate the effect of pollution on carbon sequestration.

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De Pryck & Boettcher (2024): The rise, fall and rebirth of ocean carbon sequestration as a climate ’solution‘

Kari De Pryck, Miranda Boettcher IN: Global Environmental Change 85, 102820, https://doi.org/10.1016/j.gloenvcha.2024.102820

In this paper, the authors seek to historicise the practices, discourses and actors that have constructed the ocean as a climate change solution space. They conceptualise the debate about the mitigation potential of the ocean as a contested site of governance, where varying actors form alliances and different sociotechnical narratives about climate action play out. 

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