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. 2019 Feb 2;11(2):252. doi: 10.3390/polym11020252

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© 2019 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 (http://creativecommons.org/licenses/by/4.0/).

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Adsorption isotherms for Direct Red 83:1 by β-CDs-EPI (●) and HP-β-CDs-EPI (○). (A) Freundlich isotherm, (B) Langmuir isotherm, (C) Temkin isotherm, (D) Separation factor.