Prediction Strategy of Adsorption Equilibrium Time Based on Equilibrium and Kinetic Results To Isolate Taxifolin

Abstract

We proposed a systematic strategy based on the studies about the adsorption performance of AB-8 macroporous adsorption resins for prediction of the equilibrium time in taxifolin isolation. Batch experiments were appropriately designed to obtain the best fitting model and to gain insight into the adsorption mechanisms. A modified Langmuir model was used to calculate the adsorption capacity at the adsorption equilibrium point (Q e). Subsequently, the reformed pseudo-second-order model was employed to predict the effects of the second-order rate index (k 2 Q e) on the adsorption time (t). Then, the effects of the initial adsorption factor (R i) on the relative adsorption time (t/t e) were predicted by the reformed intraparticle diffusion model. On the basis of mathematical deduction, the value of the adsorption equilibrium time (t e) can be predicted, which may lead to reduced sampling in adsorption kinetics studies. Furthermore, the good agreement between experimental and predicted data confirmed the reliability of the proposed strategy.

Remarkable Acid Stability of Polypyrrole‐MoS4: A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range

“…From the kinetic parameters of Ag + , Pb 2+ , and Hg 2+ (Table S8, Supporting Information), the calculated sorption capacities ( q e,cal ) derived from the pseudo‐second‐order model are quite close to corresponding experimental values ( q e,exp ). The fit coefficient ( R 2 ) of 1 indicates the adsorption is well fitted with the pseudo‐second‐order kinetic model, suggesting a chemisorption process …”

Exploring Metal Ion Adsorption and Antifungal Properties of Carbon‐Coated Magnetite Composite

“…Also, equilibrium was attained faster in case of Cd 2+ ions in a time span of 100 minutes in comparison to 125 minutes in case of Pb 2+ ions. Two different rate equations, pseudo‐first order and pseudo‐second order, were used to determine rate of adsorption which can be represented as follows …”

A novel indole-based conjugated microporous polymer for highly effective removal of heavy metals from aqueous solution via double cation–π interactions

“…The t coefficient (R 2 ) of 1 indicates the adsorption is well tted with the pseudo-second-order kinetic model, suggesting a chemisorption process. 39 Uptake capacity toward Ni 2+ , Cu 2+ , Cr 3+ and Zn 2+ by PTIA from aqueous solutions was studied with the batch method at room temperature. The maximum adsorption capacity of the material was determined from an adsorption equilibrium study.…”