Fig. 6

(a) Effect of initial dye concentration (pH = 9, temperature 25 °C, contact time 70 min, and adsorbent dosages of 2, 1.5, and 1 g/L for BC, BC/CoFe₂O₄, and BC/CoFe₂O₄@Mn-Fe LDH samples, respectively), (b–d) Linear correlations of the Langmuir, Freundlich, and Temkin isotherm models for the CV dye adsorption process.