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Olusegun S.♦, Osial M., Souza Taiane G.♦, Krajewski M.♦, Rodrigues G.L.S.♦, Pękała M.♦, Krysiński P.♦, Comparative characteristics and enhanced removal of tetracycline and ceftriaxone by Fe3 O 4 -lignin and Fe 3 O4 -carbon-based lignin: Mechanism, thermodynamic evaluation, and DFT calculation,
Journal of Molecular Liquids, ISSN: 0167-7322, DOI: 10.1016/j.molliq.2022.121075, Vol.371, No.121075, pp.1-16, 2023 Abstract:
In this study, eco-friendly Fe3O4-lignin (FeL) and Fe3O4-carbon-based lignin (FeCL) were synthesized, characterized, and applied for the adsorption of tetracycline (TRC) and ceftriaxone (CEF). Comparative characterization showed that the BET-specific surface area of FeCL is 27 m2/g more than that of FeL. The difference in their morphologies is insignificant, and the particle sizes range between 5 and 15 nm. There is a reduction in the oxygen content and hydroxyl group of FeCL as shown from the EDS and FTIR spectra respectively, compared with FeL. The adsorption capacity for the removal of TRC at 333 K is 156 and 148 mg g−1 by FeL and FeCL, respectively; while that of CEF are virtually the same. FeL and FeCL adsorption capacity for TRC increases with temperatures (endothermic), but decreases (exothermic) for CEF. The combination of experimental and computational approaches gave insight into the mechanisms of the adsorption process. The mechanisms of TRC and CEF adsorption by FeL and FeCL are the electrostatic attraction, hydrophobic, and π-π interaction, while only FeL shows the possibility of hydrogen bond with both TRC and CEF. The study demonstrated that the synthesized material can be reused for up to 3 cycles without an alarming loss of efficiency capacity.
Graphical abstract Keywords:
Lignin,antibiotics,Adsorption mechanisms,Thermodynamics Affiliations:
| Olusegun S. | - | other affiliation | | Osial M. | - | IPPT PAN | | Souza Taiane G. | - | other affiliation | | Krajewski M. | - | other affiliation | | Rodrigues G.L.S. | - | other affiliation | | Pękała M. | - | other affiliation | | Krysiński P. | - | other affiliation |
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