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. 2023 Jul 9;9(7):559. doi: 10.3390/gels9070559

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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/).

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Effect of initial concentration on (a) Pb²⁺, (b) Cu²⁺, and (c) Cr³⁺ adsorption. Adsorption conditions: temperature, 25 °C; shaking time, 60 min; adsorbent, 0.01 g, volume of adsorbate, 25 mL.