Adsorption of methylene blue on raw and MTZ/imogolite hybrid surfaces: Effect of concentration and calorimetric investigation

Hollow poly(cyclotriphosphazene-co-phloroglucinol) microspheres: An effective and selective adsorbent for the removal of cationic dyes from aqueous solution

“…It indicates that the basic solutions are favorable for MB adsorption on hollow PCPP microspheres. And the adsorption capacities present a significant change, as solution pH can result in the dissociation of functional groups on the active sites of the adsorbent, the changes of surface charge of the adsorbent and aqueous chemistry of dye molecules [36]. The changes of surface charge of the adsorbent can be observed, as shown in Fig.…”

“…As a result, the adsorbent presents the excellent adsorbability for MB due to the electrostatic attraction. Of course, other factors also contribute to it synergistically such as p-p stacking interactions resulting from aromatic rings of the adsorbent and adsorbate, and effects of numerous electron-rich N and O atoms owning lone pair electrons which can work as basic reactive centers [10,36]. Fig.…”

Effect of cations in the background electrolyte on the adsorption kinetics of copper and cadmium and the isoelectric point of imogolite

“…The pseudo-first order model (PFO), pseudo-second order model (PSO), Elovich equation, and intraparticle diffusion model were employed for analyzing the kinetics of the adsorption process [33][34][35][36][37][38][39][40][41][42].…”

Adsorption of malachite green in a fixed-bed columns by Thiourea modified poly(acrylonitrile-co-acrylic acid)

“…The proposed mechanism of malachite green (MG + ) adsorption onto TU-poly(AN-co-AA) (MP) polymer (Figure 5) under high pH 9 is probably a chemisorption and physisorption process attributed to electrostatic adsorption and hydrogen bonding interactions, based on the column dynamic analysis. In addition, TU-poly(AN-co-AA) adsorbent possesses electron-rich N 2 and S atoms which favor the adsorption process as they serve as basic reactive centers for MG uptake, according to [55,56].…”