Table 1 The Box-Behnken experimental design for chromium removal by rGO@Fe3O4 nanocomposites.

From: Study of linear and nonlinear isotherm and kinetic parameters of hexavalent chromium adsorption onto reduced graphene oxide coated iron oxide

Variables

Low (− 1)

Middle (0)

High (+ 1)

rGO@Fe3O4 amount (mg)

50

100

150

Initial Concentration of Cr (VI) (mg/L)

15

25

35

Agitation Period (min)

10

25

40

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