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Dimension does matter: carbon-based substances with different dimensions exhibit opposite effects on soil CO2 and CH4 production

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Abstract

Currently, carbon-based substances are widely used in agriculture and industry, leading to obvious accumulation in ecosystems. Natural ecosystems, especially water-logged areas, are important sources of greenhouse gases. However, it is not clear whether the dimensions of carbon-based substances can affect their emission. Herein, the effects of three kinds of carbon-based substances (including carbon nanotubes, graphene, and graphite powder) with dimensions from one to three on the CO2 and CH4 production potential were tested from a saltmarsh wetland soil. Carbon nanotubes inhibited CH4 production, and graphene showed slight inhibition. In contrast, graphite powder could promote methanogenesis, and the maximum CH4 concentration was 53.02 mmol g−1 L−1. With a decrease, the maximum CH4 concentration with carbon nanotubes was only 38.09 mmol g−1 L−1. Interestingly, the effect of carbon-based substances on CO2 production was opposite to that on CH4. Carbon nanotubes showed the greatest promotion effect on CO2 production. In addition, by comparing the effects of carbon-based substances on global warming equivalent, graphite powder showed a promotion effect compared with the control, while carbon nanotubes decreased it. This study provides basic data for understanding the effects of carbon-based substances with diverse dimensions on greenhouse gas dynamics in saltmarsh wetland soil.

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Abbreviations

ANOVA:

Analysis of variance

CNT:

Carbon nanotubes

GHG:

Greenhouse gas

GWE:

Global warming equivalent

GWP:

Global warming potential

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Acknowledgements

This work was supported by Research Foundation for Advanced Talents of Dezhou University (2019xgrc35) and National Natural Science Foundation of China (42277236).

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Correspondence to J. Liu.

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The authors have no competing interests to declare that are relevant to the content of this article.

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Editorial responsibility: Fatih ŞEN.

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Zhou, L., Li, X., Zhang, P. et al. Dimension does matter: carbon-based substances with different dimensions exhibit opposite effects on soil CO2 and CH4 production. Int. J. Environ. Sci. Technol. 21, 3819–3826 (2024). https://doi.org/10.1007/s13762-023-05200-4

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  • DOI: https://doi.org/10.1007/s13762-023-05200-4

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