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. 2023 Aug 17;15(16):3443. doi: 10.3390/polym15163443

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© 2023 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/).

PMC Copyright notice

XRD pattern of: (a) Ca-bentonite clay. Reprinted with permission from Ref. [36]. Copyright 2020, MDPI; (b) Na-bentonite clay. Reprinted with permission from Ref. [37]. Copyright 2011, Elsevier.