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The retention behavior of As (V) ions by BE, PN/BE, and G.Zn@PN/BE as function of the initial concentration (A–C), fitting of the As (V) adsorption results with the Langmuir model (D–F), fitting of the As (V) retention results with the Freundlich model (G–I), and fitting of the As (V) adsorption results with the D-R model (J–L).
