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  1. Rapid and efficient removal of methylene blue dye from aqueous solutions using extract-modified Zn–Al LDH
Rapid and efficient removal of methylene blue dye from aqueous solutions using extract-modified Zn–Al LDH
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Rapid and efficient removal of methylene blue dye from aqueous solutions using extract-modified Zn–Al LDH

Bagherzadeh, M

Rapid and efficient removal of methylene blue dye from aqueous solutions using extract-modified Zn–Al LDH

Bagherzadeh, M ; Sharif University of Technology | 2024

28 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.chemosphere.2023.141011
  3. Publisher: Elsevier , 2024
  4. Abstract:
  5. Environmental pollution, particularly water pollution caused by organic substances like synthetic dyes, is a pressing global concern. This study focuses on enhancing the adsorption capacity of layered double hydroxides (LDHs) to remove methylene blue (MB) dye from water. The synthesized materials are characterized using techniques like FT-IR, XRD, SEM, TEM, TGA, EDS, BET, BJH, AFM, and UV–Vis DRS. Adsorption experiments show that Zn–Al LDH@ext exhibits a significant adsorption capacity for MB dye compared to pristine LDH. In addition, Zn–Al LDH@ext shows a significant increase in stability, which is attributed to the presence of phenolic compounds in the extract and the interactions between the functional groups of the extract and LDH. The pH and adsorbent dosage optimizations show that pH 7 and 0.7 g of Zn–Al LDH@ext are optimal conditions for efficient MB removal. The study assessed adsorption kinetics through the examination of Langmuir, Freundlich, and Temkin isotherms. Additionally, four kinetic models, namely pseudo-first-order, pseudo-second-order, intraparticle diffusion, and Elovich, were analyzed. The results indicated that the Temkin isotherm (R2 = 0.9927), and pseudo-second-order (R2 = 0.9999) kinetic provided the best fit to the experimental data. This study introduces a novel approach to enhance adsorption efficiency using modified LDHs, contributing to environmentally friendly and cost-effective water treatment methods. © 2023 Elsevier Ltd
  6. Keywords:
  7. Co-precipitation ; Layered double hydroxides ; Methylene blue ; Coloring Agents ; Hydrogen-Ion Concentration ; Hydroxides ; Kinetics ; Spectroscopy, Fourier Transform Infrared ; Water Pollutants, Chemical ; Fourier transform infrared spectroscopy ; Langmuir isotherm ; Adsorption
  8. Source: Chemosphere ; Volume 350 , 2024 ; 00456535 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0045653523032812