Equilibria and kinetics of phenol adsorption on a toluene-modified hyper-cross-linked poly(styrene-co-divinylbenzene) resin

Preliminary study on removing Cs+/Sr2+ by activated porous calcium silicate—A by-product from high-alumina fly ash recycling industry

“…As shown from Figure 8, such deviation, two separated lines and not passing the origin, indicates that the intraparticle diffusion is not a sole rate-limiting step. The adsorption is controlled by multiple diffusion steps (Huang et al, 2011), involving film diffusion and intraparticle diffusion. The results also reveal that the rate constants (k i ) of the first stage and the second stage (Table 4) of Cs + are not very different, suggesting both film diffusion and intraparticle diffusion may play an important role in the adsorption kinetics; for Sr 2+ the rate constant (k i ) of the second stage is much higher than the first stage, suggesting that film diffusion play a more important role than intraparticle diffusion in the adsorption.…”

Enhanced adsorption of puerarin onto a novel hydrophilic and polar modified post-crosslinked resin from aqueous solution

“…Fig. 2 illustrated that both the N 2 adsorption isotherms seem close to type-II classification [32,33]. The adsorption isotherm of N 2 increased rapidly with the increasing of relative pressure when it is very low, demonstrating that micropores were existent.…”

A novel polymeric adsorbent by a self-doped manner: synthesis, characterization, and adsorption performance to phenol from aqueous solution

“…Besides, the values of n in the Freundlich isotherm model are over 1.0, which suggest a favorable adsorption [2]. The fact that low temperature is favorable for the adsorption is supported by the values of K F and n decreasing with the temperature increasing [39]. So the phenol uptake on VE resin at different temperatures follows a multilayer adsorption process, which is in terms of the two adsorption driving forces (hydroxyl binding and van der Waals force mentioned) related with the effect of solution pH.…”

“…In contrast to Langmuir, the Freundlich isotherm supposes that the adsorption takes place at heterogeneous surface. The Freundlich isotherm describes reversible adsorption and is not restricted to the formation of a monolayer [39]. The linear forms of the Langmuir and Freundlich equations are represented as follows [2]: Langmuir equation:…”