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. 2022 Oct 20;7(43):38347–38360. doi: 10.1021/acsomega.2c03150

Table 4. Kinetic Parameters Based on the Intraparticle Diffusion Model Exhibit Multilinearity; Two Stages of Multilinearity Are Shown, k1 and k2.

adsorbent first stage
 second stage
k1int (mg/g min1/2) R2 k2int (mg/g min1/2) R2
Pb
GO 1.22 0.987 1.08 0.999
FGO 1.13 0.999 0.859 0.994
Al
GO 0.26 0.972 0.16 0.992
FGO 0.271 0.995 0.137 0.994