Fig. 4From: The effect of pH and ionic strength on the adsorption of glyphosate onto ferrihydriteIllustration of the fit of the non-linear Langmuir model for adsorption of glyphosate onto ferrihydrite with NaCl 0.01 mol L−1 and effect of varying the parameter b in the Equation: c = a exp (b S) S/(Smax−S), [31] where c is the observed concentration; S is the observed adsorption and Smax is the maximum adsorption. b had the values indicatedBack to article page