Adsorption of rutin with a novel β-cyclodextrin polymer adsorbent: Thermodynamic and kinetic study

► Rutin adsorbed onto CroCD-TuC 3 showing the characteristic of chemical adsorption. ► Rutin/β-CD inclusion complex formation results in isosteric enthalpy increasing. ► Pore diffusion model is introduced to study the mass transfer inside the adsorbent. ► The mass transfer of rutin inside the adsorbent is the rate-restricting step.