Figure 2: Comparison of accuracy of the Langmuir, Freundlich, Temkin and Langmuir-Freundlich isotherm models to predict lactoferrin adsorption IDA-Cu2+- cryogel at different ionic strengths (temperature was 30°C and pH = 8.0); (a) 1000 mmol L−1, (b) 800 mmol L−1, (c) 600 mmol L−1, (d) 200 mmol L−1 NaCl.