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. 2022 Dec 5;27(23):8574. doi: 10.3390/molecules27238574

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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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SEM micrographs of hollow CMC/PEI beads (A and B) and their reusability performance in the removal of Cr(VI) (C) and phosphate (D) (Reprinted with permission from Ref. [122]. Copyright 2021 Elsevier.) (E) Breakthrough curves (with Thomas model fitting profiles) for bisphenol A and Cr(VI) sorption onto CTAB-modified CMC/sugarcane baggase composite in monocomponent solution and in mixture, and (F) photographs at different time intervals of the column during bisphenol A and Cr(VI) sorption (Reprinted with permission from Ref. [131]. Copyright 2022 Elsevier.) Pb(II) and Cr(VI) ions sorption by PVA/ALG and PVA/ALG/CS composite hydrogels, respectively, from real wastewater (G), their reusability performance (H) and illustration of the possible interactions between Cr(VI) ions and PVA/ALG/CS hydrogels (I) (Reprinted with permission from Ref. [111]. Copyright 2022 Elsevier.)