APLICAÇÃO DA TÉCNICA BAYESIANA PARA ESTIMAÇÃO DE PARÂMETROS DE MODELOS DE ISOTERMAS MULTICOMPONENTES: ADSORÇÃO DE Ni, Cd E Co
APLICAÇÃO DA TÉCNICA BAYESIANA PARA ESTIMAÇÃO DE PARÂMETROS DE MODELOS DE ISOTERMAS MULTICOMPONENTES: ADSORÇÃO DE Ni, Cd E Co
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DOI: https://doi.org/10.22533/at.ed.569112531035
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Palavras-chave: Adsorção em batelada; Metropolis-Hastings; MCMC; Metais pesados.
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Keywords: Batch adsorption; Metropolis-Hastings; MCMC; Heavy metals
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Abstract: This study aims to estimate the parameters of multicomponent isotherm models through a Bayesian approach using the Markov Chain Monte Carlo (MCMC) method. The Extended Langmuir, Modified Extended Langmuir, Langmuir-Freundlich, and Extended Freundlich models were applied to describe the competitive adsorption of heavy metals (Cd²⁺, Ni²⁺, and Co²⁺) on maghemite nanotubes (γ-Fe₂O₃). Experimental data from two binary systems (Cd–Ni and Co–Ni) were analyzed. Bayesian estimation via MCMC allowed the incorporation of prior knowledge and experimental uncertainties, providing credibility intervals for the isotherm parameters. Among the evaluated models, the Extended Langmuir showed the best performance, with the lowest Bayesian Information Criterion (BIC) values, balancing predictive accuracy and model simplicity. However, the Extended Freundlich model presented the poorest fit to the data among the four evaluated models, due to its high complexity and large number of adjustable parameters. The results highlight the effectiveness of Bayesian simulation techniques in modeling competitive adsorption, offering a consistent statistical basis for the design of multicomponent effluent treatment systems.
- Waldecléia Queiroz da Costa
- João Victor Tovany Soares da Silva
- Matheus Bastos do Carmo
- Miguel Fernando Saraiva Maia
- Haianny Beatriz Saraiva Lima
- Ana Paula Souza de Sousa
- Diego Cardoso Estumano