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. 2023 Feb 11;30(17):49301–49313. doi: 10.1007/s11356-023-25678-2

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Fig. 8 — Isotherm study. A Langmuir, B Freundlich, and C Temkin models, and D recyclability test [NaOH concentration = 1 M, pH = 6, C_o = 50 mg/L, m = 0.01 g, and T = 25 °C]