Synthesis of CoFe₂O₄/Graphene Oxide-Grafted Tetraethylenepentamine for Removal of Cr (VI) from Aqueous Solution

Figure 5

(a) Effect of temperature on Cr (VI) removal (pH = 2, m/V = 0.1 g/L); (b) Langmuir and (c) Freundlich isotherm curves; (d) lnK as a function of 1/T.

(a)

(b)

(c)

(d)