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- Title
Assessment, characterization, and separation of Alizarin red dye from aqueous solution using M-Fe layered double hydroxide.
- Authors
Nassar, Hossam F.; Ahmed, Hussein M.; Fawzy, Mariam E.
- Abstract
Recently, layered double hydroxides (LDH) have been applied intensively and attracted tremendous attention due to their flexible chemical composition and physical properties. In this study, we prepared a series of M (Mg and Zn)-Fe LDH at different conditions using the co-precipitation method. The influence of several important parameters was studied including M (Mg and Zn):Fe molar ratio, M-Fe LDH concentration, and pH. In this work, the potentialities of both synthesized adsorbents of M (Mg and Zn)-Fe LDH for the separation of cationic Alizarin red dye (ARD) from aqueous solutions were studied. The obtained results investigated that the maximum separation efficiency of 20 mg/L ARD was achieved at the molar ratio (4:1) of both adsorbents M (Mg and Zn):Fe at pH 6.0 and room temperature. Both pseudo-second-order kinetic models of Langmuir and Freundlich were successfully applied for the adsorption of ARD on both M (Mg and Zn)-Fe LDH adsorbents. By comparing the qm values for both adsorbents, we obtained that Mg-Fe LDH had a significantly higher adsorption capacity of 72.4 mg/g than that obtained from Zn-Fe LDH of 33.8 mg/g. These results indicated that Mg-Fe LDH has better adsorption efficiency than Zn-Fe LDH for ARD.
- Subjects
LAYERED double hydroxides; ALIZARIN; AQUEOUS solutions; ADSORPTION capacity; SORBENTS; CATIONIC surfactants
- Publication
Desalination & Water Treatment, 2023, Vol 303, p193
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2023.29740