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	K_F ± S_D [mmol^1 – n Lⁿ kg⁻¹]	n ± S_D
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

K_F, Freundlich constant; n, Freundlich exponent; S_D, standard deviation; χ²/DoF, probability distribution normalized to the number of data points; r², determination coefficient

Back to article page