Adsorption Equilibrium, Kinetics, and Thermodynamic Studies of Cefpirome Sulfate by Using Macroporous Resin

Abstract

The adsorption thermodynamics, kinetics, and isotherm parameters of cefpirome sulfate in aqueous solution on macroporous resin (XAD-16) were studied. Using static equilibrium tests, the fitting of resin adsorption data were calculated by the isothermal adsorption model. The fitting results show that Freundlich equation can adequately fit the adsorption isotherm. Meanwhile, the derived adsorption constants and their temperature dependencies from Freundlich isotherm had been used to calculate the corresponding thermodynamic quantities, such as the free energy of adsorption, heat, and entropy of adsorption. The thermodynamic data indicated that XAD-16 resin adsorption of cefpirome sulfate in aqueous solution was a spontaneous exothermic process, which was characterized by physical adsorption. The influences of initial concentration, bed height, and residence time on the breakthrough curve were examined by dynamic tests and the optimal parameters were defined.

Adsorption Equilibrium, Kinetics, and Thermodynamic Studies of Fluoride Adsorbed by Tetrametallic Oxide Adsorbent

“…The intraparticle diffusion model accounted for the initial surface adsorption and subsequent intraparticle diffusion phenomena. The intercept of the linear plot suggests that the intraparticle diffusion is not the only rate-controlling step, and the sorption process is rather complex and involves more than one diffusion resistance . Therefore, it could be stated that surface adsorption was operated in parallel to the intraparticle diffusion during fluoride and FACN interactions.…”

“…The intercept of the linear plot suggests that the intraparticle diffusion is not the only rate-controlling step, and the sorption process is rather complex and involves more than one diffusion resistance. 44 Therefore, it could be stated that surface adsorption was operated in parallel to the intraparticle diffusion during fluoride and FACN interactions. From the experimental result of kinetic models, the pseudosecond-order model was found to be best fitted with a large value of R 2 (0.99) in comparison to the other three kinetic models.…”

Self-Assembled Naphthylidene-Containing Schiff Base Anchored Polystyrene Nanocomposites Targeted for Selective Cu(II) Ion Removal from Wastewater

“…The polystyrene resin (PS) is an excellent commercial absorption material due to its macroporous structure, high specific surface area, good mechanical strength, low fluid resistance, fast exchange speed, and strong pollution resistance. , Because of these unique advantages, polystyrene resin shows potential in environmental protection such as removal of heavy metals from sewage. It has adsorption capacity due to van der Waals force, and it has screening performance because of its network structure and high specific surface area.…”

“…Therefore, it still remains a formidable challenge to design and create high efficient adsorbing materials for selective removal of copper. Polystyrene (PS) resin is a promising commercial absorbent candidate that has shown porosity, high specific surface area, and long service life with superior reusability. , Nevertheless, the direct application of polystyrene resin is hindered by its unspecific interaction forces due to the fact that it mainly adsorbs hydrophobic substances from aqueous solution by van der Waals forces and adsorbs heavy metal ions by electrostatic interaction. Various strategies such as encapsulation of an organic small molecule to resin have been explored to resolve these problems .…”

Extraction and Characterization of Chitosan from Crab Shells: Kinetic and Thermodynamic Studies of Arsenic and Copper Adsorption from Electroplating Wastewater

“…Reactions only occur spontaneously if ΔGº at a given temperature is negative. The Van't Hoff equation can be used to calculate the Gibbs free energy change ΔG of the adsorption process [61] Δ (12)…”