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Environmental Sciences Europe

Table 4 Freundlich isotherm fitting parameters for sorption of gluconic acid on gibbsite at various pH values

From: Adsorption of aliphatic polyhydroxy carboxylic acids on gibbsite: pH dependency and importance of adsorbate structure

pH

χ2/DoF

r 2

KF ± SD [mmol1 – n Ln kg−1]

n ± SD

4

0.61

0.912

9.33 ± 0.78

0.30 ± 0.03

7

0.11

0.965

7.48 ± 0.77

0.23 ± 0.03

9

0.67

0.962

1.20 ± 0.25

0.78 ± 0.04

12

2.56

0.908

2.91 ± 0.36

0.70 ± 0.03

  1. KF, Freundlich constant; n, Freundlich exponent; SD, standard deviation; χ2/DoF, probability distribution normalized to the number of data points; r2, determination coefficient
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