Sorption of dibenzofuran derivatives from aqueous solutions by β-cyclodextrin polymers: an isosteric heat approach

Isosteric heats of sorption of 1-naphthol and phenol from aqueous solutions by β-cyclodextrin polymers

“…Pan et al [16] found the same heterogeneity patterns for a particular sorbent using different sorbates. In contrast, in our previous work [6], we obtained different patterns with polar and nonpolar organic sorbates using the same cyclodextrin-epichlorohydrin polymer. Several authors have mentioned the heterogeneity of cyclodextrin polymers crosslinked with epichlorohydrin [27][28][29].…”

“…The B.E.T. surface area of a similar cyclodextrin polymer was measured in our previous work [6]. A small value of 0.11 m 2 /g pointed to a negligible effect of the physical adsorption onto the surface, as expected for gel-like sorbents.…”

“…In a previous work [6], we used an isosteric heat approach to study the heterogeneity of epichlorohydrin-crosslinked β-cyclodextrin (seven glucose units). The sorption isosteric heat approach has been applied frequently to the gas-solid equilibrium [7][8][9][10] because it was developed for this type of system.…”

Interaction of naproxen with β-cyclodextrin and its derivatives/polymer: experimental and molecular modeling studies

“…The Langmuir and Freudlich isotherms are the most frequently used equations to plot data corresponding to adsorption from solution measurements [55]. Freundlich isotherm was used to describe equilibrium adsorption data, because different energy adsorption sites are expected in the polymeric network [56]. The fitting parameters for the Freundlich isotherm (q e = K f C e n ) are K f = 5.9340, n = 6.0544 and with R 2 C 0.996.…”

Sorption models in cyclodextrin polymers: Langmuir, Freundlich, and a dual-mode approach

“…Polymers bearing CD moieties can be synthesized by crosslinking CDs using epichlorohydrin or other bifunctional agents. These materials can be successfully used to entrap pollutants [3,4] or even as biofilm attachment media for wastewater treatment [5].…”