Table 1 Langmuir isotherm parameters for PFOA and 3-indole-acetic-acid adsorption on Na+-, and HDTMA-montmorillonite at pH 6.0.

From: Complete Defluorination of Perfluorinated Compounds by Hydrated Electrons Generated from 3-Indole-acetic-acid in Organomodified Montmorillonite

Smectite clay

PFOA

IAA

KL (L mmol−1)

Cmax (mmol kg−1)

R2

KL (L mmol−1)

Cmax (mmol kg−1)

R2

Na+-montmorillonite

0.539

8.199

0.987

4.025

4.673

0.899

HDTMA-montmorillonite

11.839

277.312

0.944

8.212

70.005

0.929

  1. The adsorption data were fitted with Langmuir isotherm model: qe = (KL × Cmax × Ce)/(1 + KL × Ce); where qe is the amount of adsorbate adsorbed on mineral surfaces in mmol kg−1, Ce is the equilibrium concentration in mM, KL is the Langmuir constant, L mmol−1; Cmax is sorption capacity in mmol kg−1; R2 is the coefficient of determination from the overall regression analysis.
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