Bioinorganic Chemistry and Applications / 2014 / Article / Tab 2

Research Article

Removal of Cr(VI) from Aqueous Solutions Using Powder of Potato Peelings as a Low Cost Sorbent

Table 2

(a) Kinetic parameters for the adsorption of Cr(VI) onto potato peel powder at °C. (b) Averaged kinetic parameters for the adsorption of Cr(VI) onto potato peel powder at °C.
(a)

Kinetic modelLinear equationInitial Cr(VI) concentration, mg/LReaction constant

Pseudo-first-order 40  min−10.842
60  min−10.882
100  min−10.906
120  min−10.870

Elovich 20  mg·g−1·min−1
 g/mg
0.907
40  mg·g−1·min−1   
 g/mg
0.965
60  mg·g−1·min−1   
 g/mg
0.861
100  mg·g−1·min−1   
 g/mg
0.902
120  mg·g−1·min−1   
 g/mg
0.956

(b)

Kinetic modelLinear equationReaction constant

Pseudo-first-order  min−1
Elovich  mg·g−1·min−1
 g/mg