Calcined Mg-Fe Layered Double Hydroxide Adsorbent for Acid Red G Dye Removal

Abstract:

The calcined Mg-Fe LDH adsorbent (CLDH) was fabricated by co-precipitation and calcination processes. The adsorbent was characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy. The adsorbent exhibited high adsorption capacity for the removal of acid red G (ARG) dye. The effects of the adsorbent dose, solution pH, contact time, reaction temperature and initial ARG dye concentrations upon the ARG dye adsorption were investigated in detail. The kinetic studies indicated that the adsorption process was fitted well with the pseudo-second-order kinetic model (R² > 0.99). The equilibrium data were well described by the Freundlich equation. Moreover, after three regeneration cycles, the CLDH still showed high adsorption capacity. The results showed that the CLDH is an efficient adsorbent for the removal of organic pollutants from wastewater.

• Periodical: Advanced Materials Research (Volumes 864-867)
• Pages: 719-726
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.864-867.719
• Online since: December 2013
• Authors: Li Qun Sun*, Zhi Quan Ren
• Keywords: Acid Red G, Adsorption, Co-Precipitation, Layered Double Hydroxides (LDHs)

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