Synthesis of LDH-MgAl and LDH-MgFe composites for the efficient removal of the antibiotic from water.

Autor: Manzar MS; Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Palaniandy P; School of Civil Engineering, Universiti Sains Malaysia, George Town, Penang, Malaysia., Georgin J; Department of Civil and Environmental, Universidad de La Costa, CUC, Calle 58 # 55-66, Barranquilla, Atlántico, Colombia., Franco DSP; Department of Civil and Environmental, Universidad de La Costa, CUC, Calle 58 # 55-66, Barranquilla, Atlántico, Colombia., Zubair M; Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Muazu ND; Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., Faisal W; Department of Environmental Engineering, College of Engineering, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia., El Messaoudi N; Laboratory of Applied Chemistry and Environment, Faculty of Sciences, Ibn Zohr, University, 80000, Agadir, Morocco. noureddine.elmessaoudi@edu.uiz.ac.ma.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Sep; Vol. 31 (43), pp. 55577-55596. Date of Electronic Publication: 2024 Sep 06.
DOI: 10.1007/s11356-024-34837-y
Abstrakt: In this study, novel lamellar double hydroxide composites (LDH-MgAl and LDH-MgFe) were synthesized at different metal salt ratios (1:1 to 3:1) and fully characterized using various techniques such as XRD, FTIR, SEM, EDS, and TGA. The resulting LDHs demonstrated a high affinity for efficiently removing tetracycline (TC) antibiotic from water, particularly at a moderate molar ratio of 3:1. This ratio exhibited improved structural characteristics, resulting in better TC uptake from water. The improved performance was supported by the increased abundance of surface functional groups (OH, NO 3 , CO 3 2- , C-O-C, Fe-O, and Al-O-Al). The TGA analysis established the high stability of the LDHs when subjected to high temperatures. The kinetics of TC adsorption onto LDH fitted with the PSO (R 2  = 0.935-0.994) and Avrami (R 2  = 0.9528-0.9824) models, while the equilibrium data fitted the Liu and Langmuir isotherm models, with maximum monolayer adsorption capacities of 101.1 mg g -1 and 70.83 mg g -1 , respectively-significantly higher than many reported values in the literature. The positive values of ΔH 0 and ΔS 0 indicate an endothermic process, with TC removal mechanisms influenced by physical interactions, such as hydrogen bonding, electrostatic interaction, and π-cation with the surface functional groups of the LDH adsorbents. These results suggest that LDH-MgAl and LDH-MgFe are promising adsorbents for the removal of TC from water.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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