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Table 2 Langmuir and Freundlich constants for the adsorption of Pb(II), Cu(II), Cr(III), Cd(II), and Ni(II) by MWCNTs-EDDA

From: A new sorbent based on MWCNTs modification for separation/preconcentration of trace amounts of Cd(II), Cr(III), Cu(II), Ni(II), and Pb(II) and their determination by flame atomic absorption spectrometry

Metal ions Langmuir Freundlich
q max (mg g−1) b R k f n R
Pb(II) 65.351 0.06468 0.9867 6.5433 0.5114 0.9712
Cr(III) 71.45 0.06063 0.9853 6.9347 0.5132 0.9825
Ni(II) 60.19 0.06155 0.9879 5.7904 0.5177 0.9786
Cd(II) 54.26 0.06267 0.9907 4.8323 0.5445 0.9597
Cu(II) 50.12 0.06905 0.9875 4.9930 0.5217 0.9503