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Table 6 Kinetic parameters for the biosorption of Cu2+ on Oxalic acid modified and raw Saccharum officinarum biomas

From: Bioremediation of Cu(II) contaminated water by Saccharum officinarum: effect of oxalic acid modification on equilibrium, kinetic and thermodynamic parameters

   Oxalic acid modified biomas Raw raw biomas
  C o (mg L−1) 100 200 300 400 500 100 200 300 400 500
C e (mg L−1) 3.20 5.04 10.20 42.74 58.50 20.40 37.80 65.20 92.60 137.20
Q exp (mg g−1) 48.4 97.48 144.9 178.63 220.75 39.8 81.1 117.4 153.7 181.4
Pseudo first-order Qe (mg g−1) 45.54 91.62 134.13 168.29 211.69 37.58 75.88 112.47 142.34 169.06
k 1  × 10 2 (min−1) 11.4 11.8 12.3 14.6 13.7 8.73 7.37 8.00 7.62 8.57
R 2 0.997 0.997 0.995 0.997 0.999 0.996 0.992 0.994 0.988 0.991
ΔQe SSE 0.59 0.60 0.74 0.58 0.41 0.56 0.64 0.42 0.74 0.68
ΔQe HYBRID 0.66 0.67 0.83 0.64 0.46 0.62 0.72 0.47 0.82 0.76
Pseudo second-order Qe (mg g−1) 48.88 98.11 144.00 179.37 224.75 40.59 82.71 121.82 154.73 182.67
k 2 x10 3(g mg−1 min−1) 3.65 1.92 1.33 1.34 1.04 3.26 1.30 0.98 0.73 0.72
R 2 0.999 0.999 0.999 0.999 0.999 0.999 0.998 0.999 0.996 0.998
ΔQe SSE 0.10 0.07 0.06 0.04 0.18 0.20 0.20 0.38 0.07 0.07
ΔQe HYBRID 0.11 0.07 0.07 0.05 0.20 0.22 0.22 0.42 0.07 0.08
Elovich α (mg (g min)−1) 109.76 275.87 408.82 1522.13 1946.75 35.10 40.75 81.44 87.92 154.74
β (g mg−1) 0.16 0.08 0.06 0.05 0.04 0.17 0.08 0.06 0.04 0.04
Q e t=0 (mg g−1) 6.09 11.85 17.44 18.96 23.59 5.77 12.83 17.98 23.49 26.09
R 2 0.997 0.996 0.995 0.992 0.993 0.998 0.999 0.999 0.999 0.999
ΔQe SSE 3.58 8.53 13.29 16.80 21.01 2.53 6.53 10.21 13.84 16.70
ΔQe HYBRID 3.98 9.48 14.76 18.67 23.34 2.81 7.25 11.34 15.38 18.56
Avramin Qe (mg g−1) 45.54 91.62 134.13 168.29 211.69 37.58 75.88 112.47 142.34 169.06
\(k_{1} \left( {\min^{ - 1} } \right)_{av}^{n}\) 0.28 0.48 0.27 0.36 0.42 0.24 0.38 0.21 0.24 0.35
n av 0.41 0.24 0.46 0.40 0.33 0.36 0.19 0.38 0.31 0.24
R 2 0.997 0.997 0.995 0.997 0.999 0.996 0.992 0.994 0.988 0.991
ΔQe SSE 0.59 0.60 0.74 0.58 0.41 0.56 0.64 0.42 0.74 0.68
ΔQe HYBRID 0.66 0.67 0.83 0.64 0.46 0.62 0.72 0.47 0.82 0.76
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