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. 2016 Dec 15;6:39108. doi: 10.1038/srep39108

Table 2. Langmuir and Freundlich isotherm models parameters for adsorption of phosphate on the RGO-Zr, Zr(OC3H7)4 and GO at high initial phosphate concentrations.

Sample Langmuir model
 Freundlich model
qm (mg/g) kL (L/mg) R2 kF 1/n R2
RGO-Zr 27.71 17.19 0.9998** 22.56 0.21 0.8631**
Zr(OC3H7)4 23.42 85.40 0.9999** 24.02 0.15 0.9558**
GO 7.49 0.50 0.9734** 2.73 0.35 0.9511**

Note: ** means correlation analyses of the data by SPSS 19.0 resulted in equations with P < 0.01 (two sides), and revealing the extremely significant correlation between qe and Ce.