Skip to main content

Table 3 Surface area, maximum adsorption capacity and maximum adsorption densities values for iron oxides

From: The effect of pH and ionic strength on the adsorption of glyphosate onto ferrihydrite

Mineral SA (m2 g−1) MAC (mg g−1) MAD (µmol m−2) Adsorption conditions References
Ferrihydrite 6 line 234 54.88a 1.39a NaCl 0.10 mol L−1, pH 5.0 This work
Ferrihydrite 6 line 234 32.83a 0.83a NaCl 0.01 mol L−1, pH 5.0 This work
Ferrihydrite 2 line 343 107a 1.85a KCl 0.10 mol L−1, pH 7.0 [16]
Hematite 33 14.5a 2.61a KCl 0.10 mol L−1, pH 7.0 [16]
Hematite 11.1 6.31b 3.36b pH 4.5 [13]
Hematite 11.1 7.89b 4.21b pH 7.0 [13]
Goethite 50.7 16.3b 1.90b pH 4.5 [13]
Goethite 50.7 21.6b 2.52b pH 7.0 [13]
Goethite 40 10.1c 1.50c KCl 0.010 mol L−1, pH 7.0 [15]
Goethite 40 11.8c 1.75c KCl 0.10 mol L−1, pH 7.0 [15]
Goethite 40 11.8c 1.75c Ca(Cl)2 0.01 mol L−1, pH 7.0 [15]
Goethite 60 21.3a 2.10a NaCl 0.01 mol L−1, pH 5.0 [19]
Goethite 60 17.2a 1.70a NaCl 0.01 mol L−1, pH 7.2 [19]
  1. SA surface area, MAC maximum adsorption capacity, MAD maximum adsorption densities
  2. aLangmuir isotherm, bFreundlich isotherm, c initial concentration 2.5 mL of 80 mmol L−1 of glyphosate