Fig. 4. (a) PFO, (b) PSO, (c) Elovich, and (d) intraparticle diffusion nonlinear plots for Pb2+ adsorption by XF and TXF (Ci = 500 mg L−1, T = 22 °C, t = 80 min, pH 6, nanofiber dosage = 2 g L−1).
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