Adsorption kinetics and thermodynamics of an anionic dye onto sepiolite

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Critical review in adsorption kinetic models (2009, background): “Weber-Morris model Weber-Morris found that in many adsorption cases, solute uptake varies almost proportionally with t rather than with the contact time t (Alkan et al., 2007):”
Variability of the surface properties of sepiolite (2012, background): “The data for the BET surface of sepiolite from Eskisehir ranges between 243 m2g−1 (Mehmet, 2009) and 342 m2g−1 (Alkan et al., 2007), although the most frequent value observed is ~330 m2g−1.”
Adsorption of Cd(II) and Pb(II) ions from aqueous solutions using mesoporous activated carbon adsorbent: Equilibrium, kinetics and characterisation studies (2017, background): “…process, the adsorbate diffuse into the interior of the adsorbent and this process is dependent on the square root of time (t 1/2 ) rather than time (t), where the intercept (C) is related to the boundary layer (Azarudeen et al., 2015; Qiu et al., 2009; Gurses et al., 2014; Alkan et al., 2007).”
Comparative study on adsorption of two cationic dyes by milled sugarcane bagasse (2013, background): “Conversely, the negative ΔS° value indicates a decrease in randomness at solid/solution interface and no significant changes occurs in the internal structure of the adsorbents through the adsorption (Alkan et al., 2007).”
Congo Red adsorption by ball-milled sugarcane bagasse (2011, unknown): “of bagasse through the adsorption process [29].”