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Table 4

Linear parameters of Langmuir, Freundlich, D-R and Sips for adsorption of Cd2+ by E. in natura, E. H2O2, E. H2SO4 and E NaOH

ParametersE. in naturaE. H2O2E. H2SO4E. NaOH
Langmuir Qm (mg g−1) 1.785 4.591 2.881 14.923 
KL (L mg−1) 1.592 −0.036 0.441 0.000 
RL 0.003 −0.159 0.011 0.988 
R2 0.993 0.996 0.999 0.993 
Freundlich Kf (mg g−1) 0.061 3.128 1.886 7.797 
N 1.358 9.573 12.367 5.074 
R2 0.959 0.894 0.910 0.992 
D-R Qd (mol L−1) 9.017E-05 4.762E-05 4.885E-05 2.495E-04 
E (KJ mol−1) 8.853 36.140 32.308 17.961 
R2 0.984 0.580 0.604 0.997 
Sips n 0.607 0.818 0.720 1.795 
Ks (L mg−1) 0.070 0.222 0.106 1.578 
R2 0.995 0.885 0.999 0.999 
ParametersE. in naturaE. H2O2E. H2SO4E. NaOH
Langmuir Qm (mg g−1) 1.785 4.591 2.881 14.923 
KL (L mg−1) 1.592 −0.036 0.441 0.000 
RL 0.003 −0.159 0.011 0.988 
R2 0.993 0.996 0.999 0.993 
Freundlich Kf (mg g−1) 0.061 3.128 1.886 7.797 
N 1.358 9.573 12.367 5.074 
R2 0.959 0.894 0.910 0.992 
D-R Qd (mol L−1) 9.017E-05 4.762E-05 4.885E-05 2.495E-04 
E (KJ mol−1) 8.853 36.140 32.308 17.961 
R2 0.984 0.580 0.604 0.997 
Sips n 0.607 0.818 0.720 1.795 
Ks (L mg−1) 0.070 0.222 0.106 1.578 
R2 0.995 0.885 0.999 0.999 
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