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Table 4 Isotherm 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
Langmuir Q max (mg g−1) 379.15 236.16
b (L mg−1) 0.0069 0.12
RL 0.36 0.04
R 2 0.999 0.990
Freudlinch KF (mg g−1 (mg L−1)−1/n) 6.55 51.13
n 1.46 2.83
R 2 0.996 0.983
Tempkin AT (L g−1) 0.08 1.14
BT (J mol−1 g mg−1) 33.06 49.62
R 2 0.999 0.989
Dubinin–Radushkevich Q s (mg g−1) 172.08 195.14
E (kJ mol−1) 0.06 0.39
R 2 0.984 0.989
Redlich–Peterson Q 0 (mg g−1) 2.28 26.39
K R (mg−1 g)1/g 0.000513 0.0845
g 1.47 1.07
R 2 0.999 0.990
Sips Q s (mg g−1) 258.63 207.09
\(K_{s} \left( {{\text{mg}}^{{ - 1}} {\text{L}}} \right)_{{\text{s}}}^{{1/\beta }}\) 0.014 0.17
βs 1.32 1.61
R 2 0.999 0.992
Hill Q H (mg g−1) 262.65 207.09
\(K_{H} \left( {mg^{ - 1} L} \right)_{H}^{1/n}\) 269.23 17.58
nH 1.30 1.61
R 2 0.999 0.992
Toth Q T (mg g−1) 142.99 270.12
K T (mg L−1) 108.91 8.88
t 1.18 0.97
R 2 0.999 0.990
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