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Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth

[Image: see text] To lock atmospheric CO(2) at anthropogenic timescale, fast weathering silicates can be applied to soil to speed up natural CO(2) sequestration via enhanced weathering. Agricultural lands offer large area for silicate application, but expected weathering rates as a function of soil...

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Autores principales: Haque, Fatima, Santos, Rafael M., Dutta, Animesh, Thimmanagari, Mahendra, Chiang, Yi Wai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374988/
https://www.ncbi.nlm.nih.gov/pubmed/30775646
http://dx.doi.org/10.1021/acsomega.8b02477
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author Haque, Fatima
Santos, Rafael M.
Dutta, Animesh
Thimmanagari, Mahendra
Chiang, Yi Wai
author_facet Haque, Fatima
Santos, Rafael M.
Dutta, Animesh
Thimmanagari, Mahendra
Chiang, Yi Wai
author_sort Haque, Fatima
collection PubMed
description [Image: see text] To lock atmospheric CO(2) at anthropogenic timescale, fast weathering silicates can be applied to soil to speed up natural CO(2) sequestration via enhanced weathering. Agricultural lands offer large area for silicate application, but expected weathering rates as a function of soil and crop type, and potential impacts on the crops, are not well known. This study investigated the role of plants on enhanced weathering of wollastonite (CaSiO(3)) in soils. Using rooftop pot experiments with leguminous beans (Phaseolus vulgaris L.) and nonleguminous corn (Zea mays L.), CO(2) sequestration was inferred from total inorganic carbon (TIC) accumulation in the soil and thermogravimetric analysis, and mineral weathering rate was inferred from alkalinity of soil porewater. Soil amendment with wollastonite promoted enhanced plant growth: beans showed a 177% greater dry biomass weight and corn showed a 59% greater plant height and a 90% greater dry biomass weight. Wollastonite-amended soil cultivated with beans showed a higher TIC accumulation of 0.606 ± 0.086%, as compared to that with corn (0.124 ± 0.053%). This demonstrates that using wollastonite as a soil amendment, along with legume cultivation, not only buffers the soil against acidification (due to microbial nitrogen fixation) but also sequesters carbon dioxide (12.04 kg of CO(2)/tonne soil/month, 9 times higher than the soil without wollastonite amendment).
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spelling pubmed-63749882019-02-15 Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth Haque, Fatima Santos, Rafael M. Dutta, Animesh Thimmanagari, Mahendra Chiang, Yi Wai ACS Omega [Image: see text] To lock atmospheric CO(2) at anthropogenic timescale, fast weathering silicates can be applied to soil to speed up natural CO(2) sequestration via enhanced weathering. Agricultural lands offer large area for silicate application, but expected weathering rates as a function of soil and crop type, and potential impacts on the crops, are not well known. This study investigated the role of plants on enhanced weathering of wollastonite (CaSiO(3)) in soils. Using rooftop pot experiments with leguminous beans (Phaseolus vulgaris L.) and nonleguminous corn (Zea mays L.), CO(2) sequestration was inferred from total inorganic carbon (TIC) accumulation in the soil and thermogravimetric analysis, and mineral weathering rate was inferred from alkalinity of soil porewater. Soil amendment with wollastonite promoted enhanced plant growth: beans showed a 177% greater dry biomass weight and corn showed a 59% greater plant height and a 90% greater dry biomass weight. Wollastonite-amended soil cultivated with beans showed a higher TIC accumulation of 0.606 ± 0.086%, as compared to that with corn (0.124 ± 0.053%). This demonstrates that using wollastonite as a soil amendment, along with legume cultivation, not only buffers the soil against acidification (due to microbial nitrogen fixation) but also sequesters carbon dioxide (12.04 kg of CO(2)/tonne soil/month, 9 times higher than the soil without wollastonite amendment). American Chemical Society 2019-01-16 /pmc/articles/PMC6374988/ /pubmed/30775646 http://dx.doi.org/10.1021/acsomega.8b02477 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Haque, Fatima
Santos, Rafael M.
Dutta, Animesh
Thimmanagari, Mahendra
Chiang, Yi Wai
Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title_full Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title_fullStr Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title_full_unstemmed Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title_short Co-Benefits of Wollastonite Weathering in Agriculture: CO(2) Sequestration and Promoted Plant Growth
title_sort co-benefits of wollastonite weathering in agriculture: co(2) sequestration and promoted plant growth
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6374988/
https://www.ncbi.nlm.nih.gov/pubmed/30775646
http://dx.doi.org/10.1021/acsomega.8b02477
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