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. 2022 Aug 29;8(9):548. doi: 10.3390/gels8090548

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© 2022 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Change in pH over time with the addition of pure limestone (●), 1 wt% laboratory-grade alginate hydrogels (no CaCO₃ addition) (▲), 1 wt% laboratory-grade alginate hydrogels (no CaCO₃ addition and washed) (×) and hydrogels with added CaCO₃ (■). Error bars show the standard deviation between triplicate experimental runs. ANOVA analysis with a significance of 0.05 was applied to the equilibrium results.