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Table 1 (a) Parameters of the linear and nonlinear pseudo-first model for Cr(VI) adsorption on PSD at different initial concentrations; (b) Parameters of the linear and nonlinear pseudo-second order model for Cr(VI) adsorption at different initial concentrations

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

(a)
C0/mg L−1 qe,exp/mg g−1 Pseudo first order
Linear form Nonlinear form
qe,cal/mg g−1 k1/min−1 R2 qe,cal/mg g−1 k1/min−1 R2
5 1.06 0.56 1.68 × 10–2 0.9686 0.99 4.95 × 10–2 0.8232
7.5 1.54 0.95 1.68 × 10–2 0.9977 1.41 4.47 × 10–2 0.7521
10 2.1 1.37 1.11 × 10–2 0.9842 1.91 2.92 × 10–2 0.853
25 4.1 2.99 7.08 × 10–3 0.9917 3.43 2.08 × 10–2 0.8879
50 5.2 4.03 1.01 × 10–2 0.9948 4.69 1.96 × 10–2 0.8996
(b)
C0/mg L−1 qe,exp/mg g−1 Pseudo second order
Linear form Nonlinear form
qe,cal/mg g−1 k2/g−1 mg−1 min−1 R2 qe,cal/mg g−1 k2/g−1 mg−1 min−1 R2
5 1.06 1.1 6.38 × 10–2 0.9995 1.09 6.92 × 10–2 0.9336
7.5 1.54 1.62 3.40 × 10–2 0.9992 1.56 4.26 × 10–2 0.8979
10 2.1 2.22 1.39 × 10–2 0.9951 2.16 1.81 × 10–2 0.9362
25 4.1 4.16 5.66 × 10–3 0.9941 3.98 6.39 × 10–3 0.9525
50 5.2 5.58 4.24 × 10–3 0.9954 5.45 4.39 × 10–3 0.9541