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Table 2 Parameters of Webber–Morris intraparticle and Boyd film diffusion models for Cr(VI) adsorption on PSD at different initial concentrations

From: Adsorption behavior of Cr(VI) by biomass-based adsorbent functionalized with deep eutectic solvents (DESs)

C0/
mg L−1
kid/
mg g−1 min1/2
C1 R2 kb/
min−1
C2 R2
5 3.68 × 10–2 0.5 0.8958 1.68 × 10–2 0.13 0.9686
7.5 5.63 × 10–2 0.66 0.937 1.67 × 10–2 − 0.02 0.9977
10 8.94 × 10–2 0.63 0.9618 1.09 × 10–2 − 6.46 0.9919
25 0.18 0.73 0.9819 7.03 × 10–3 − 0.18 0.9917
50 0.24 0.96 0.9828 9.82 × 10–3 − 0.25 0.9972