Modified hierarchical zeolite X derived from riceberry rice husk for propionic acid adsorption

chat, Nareerat Na; Sangsuradet, Supawon; Tobarameekul, Patchaya; Worathanakul, Patcharin

doi:10.1016/j.matchemphys.2022.125933

Cited by 7 publications

(1 citation statement)

References 40 publications

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“…Adsorption is among the most widely used techniques and is easy to implement. The elimination of dyes in aqueous solutions with adsorption onto various solid materials, particularly transition metal oxides, has been the subject of numerous studies [ 34 , 35 , 36 , 37 ]. The adsorption of organic molecules such as those of dyes onto cobalt oxide has proven to be a very effective treatment technique; however, only in the case of certain recalcitrant dyes.…”

Section: Introductionmentioning

confidence: 99%

A Statistical Physics Approach to Understanding the Adsorption of Methylene Blue onto Cobalt Oxide Nanoparticles

Dehbi,

Dehmani,

Franco

et al. 2024

Molecules

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The production of cobalt oxide nanoparticles and their use in the adsorption of methylene blue (MB) from solution is described in the paper. The X-ray diffraction patterns show that the synthesized cobalt oxide nanoparticles have a crystalline cubic structure. The study of the adsorption of methylene blue onto the cobalt oxide nanoparticles involved determining the contact time and initial concentration of the adsorption of MB on the adsorbent. The kinetics of adsorption were analyzed using two kinetic models (pseudo-first order and pseudo-second order), and the pseudo-second-order model was found to be the most appropriate for describing the behavior of the adsorption. This study indicates that the MLTS (monolayer with the same number of molecules per site) model is the most suitable model for describing methylene blue/cobalt oxide systems, and the parameter values help to further understand the adsorption process with the steric parameters. Indicating that methylene blue is horizontally adsorbed onto the surface of the cobalt oxide, which is bonded to two different receptor sites. Regarding the temperature effect, it was found that the adsorption capacity increased, with the experimental value ranging from 313.7 to 405.3 mg g−1, while the MLTS predicted 313.32 and 408.16 mg g−1. From the thermodynamic functions, high entropy was found around 280 mg L−1 concentration. For all concentrations and temperatures examined, the Gibbs free energy and enthalpy of adsorption were found to be negative and positive, respectively, suggesting that the system is spontaneous and endothermic. According to this study’s findings, methylene blue adsorption onto cobalt oxide nanoparticles happens via the creation of a monolayer, in which the same amount of molecules are adsorbed at two distinct locations. The findings shed light on the methylene blue adsorption process onto cobalt oxide nanoparticles, which have a variety of uses, including the remediation of wastewater.

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