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Journal of Analytical Science and Technology
Fig. 7 | Journal of Analytical Science and Technology

Fig. 7

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

Fig. 7

Adsorption isotherms of a Pb(II), Cr(III), and Ni(II) and b Cd(II) and Cu(II) by MWCNTs-EDDA at initial metal ions concentration from 0.5 to 90 μg mL−1, pH 5.0, 6.0, 9.0, 8.0, and 7.0 for Pb(II), Ni(II), Cd(II), Cu(II), and Cr(III) ions, respectively, and temperature of 25 ± 0.2 °C for 24 h. The data are fitted by Langmuir model and Freundlich model

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