RT Journal Article
T1 Optimization of synergistic biosorption of oxytetracycline and cadmium from binary mixtures on reed-based beads: modeling study using Brouers-Sotolongo models
A1 Karoui, Sarra
A1 Ben Arfi, Rim
A1 Fernández Sanjurjo, María J.
A1 Núñez Delgado, Avelino
A1 Ghorbal, Achraf
A1 Álvarez Rodríguez, Esperanza
K1 Oxytetracycline
K1 Cadmium
K1 Biocomposite
K1 CCD-RSM
K1 Brouers-Sotolongo
AB The first aim of this study was to synthesize and characterize reed-based-beads (BBR), an enhanced adsorbent from Tunisian reed. The second purpose was to evaluate and optimize the BBR efficiency for the simultaneous removal of oxytetracycline (OTC) and cadmium (Cd(II)), using central composite design under response surface methodology. The third goal was to elucidate the biosorption mechanisms taking place. It was shown that under optimum conditions (4.19 g L−1 of BBR, 165.54 μmol L−1 of OTC, 362.16 μmol L−1 of Cd(II), pH of 6, and 25.14-h contact time) the highest adsorption percentages (63.66% for OTC and 99.99% for Cd(II)) were obtained. It was revealed that OTC adsorption mechanism was better described by Brouers-Sotolongo fractal equation, with regression coefficient (R2) of 0.99876, and a Person’s chi-square (χ2) of 0.01132. The Weibull kinetic equation better explained Cd(II) biosorption (R2 = 0.99959 and χ2 = 0.00194). FTIR and isotherm studies confirmed that the BBR surface was heterogeneous, and that adsorption mechanisms were better described by the Freundlich/Jovanovich equation (R2 = 0.99276 and χ2 = 0.04864) for OTC adsorption, and by the Brouers-Sotolongo model (R2 = 0.9851 and χ2 = 0.77547) for Cd(II) biosorption. Overall results indicate that, at last, the BBR lignocellulosic biocomposite beads could be considered as cost-effective and efficient adsorbent, which could be of socioeconomic and environmental relevance.
PB Springer Verlag
YR 2021
FD 2021
LK https://hdl.handle.net/10347/38697
UL https://hdl.handle.net/10347/38697
LA eng
NO Karoui, S., Ben Arfi, R., Fernández-Sanjurjo, M. J., Nuñez-Delgado, A., Ghorbal, A., & Álvarez-Rodríguez, E. (2021). Optimization of synergistic biosorption of oxytetracycline and cadmium from binary mixtures on reed-based beads: modeling study using Brouers-Sotolongo models. Environmental Science and Pollution Research International, 28(34), 46431–46447. https://doi.org/10.1007/s11356-020-09493-7
NO This is the author’s version of the work. The definitive version was published in Environmental science and pollution research international, vol. 28 (2021), available online at: https://doi.org/10.1007/s11356-020-09493-7
NO The authors would like to thank the Ministry of Higher Education and Scientific Research and the University of Sfax (Tunisia) for the financial support.
DS Minerva
RD 24 abr 2026