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. 2020 Jan 23;7:100804. doi: 10.1016/j.mex.2020.100804

Table 2.

Freundlich and Langmuir constants.

Freundlich adsorption
Langmuir adsorption
kf N R2 Q0 b R2
Pb2+ 4.43 2.11 0.88 10.31 1.18 0.81
Zn2+ 0.55 1.72 0.95 8.74 0.04 0.64