期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 107, 期 -, 页码 1792-1799出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2017.10.045
关键词
Activated carbon; Activated carbon-alginate beads; Methylene blue; Adsorption isotherm; Adsorption kinetics
High surface area mesoporous activated carbon-alginate (AC-alginate) beads were successfully synthesized by entrapping activated carbon powder derived from Mangosteen fruit peel into calcium-alginate beads for methylene blue (MB) removal from aqueous solution. The structure and surface characteristics of AC-alginate beads were analyzed using Fourier transform infra-red (FTIR) spectroscopy, scanning electron microscopy (SEM) and surface area analysis (S-BET), while thermal properties were tested using thermogravimetric analysis (TGA). The effect of AC-alginate dose, pH of solution, contact time, initial concentration of MB solution and temperature on MB removal was elucidated. The results showed that the maximum adsorption capacity of 230 mg/g was achieved for 100 mg/L of MB solution at pH 9.5 and temperature 25 degrees C. Furthermore, the adsorption of MB on AC-alginate beads followed well pseudo-second order equation and equilibrium adsorption data were better fitted by the Freundlich isotherm model. The findings reveal the feasibility of AC-alginate beads composite to be used as a potential and low cost adsorbent for removal of cationic dyes. (C) 2017 Elsevier B.V. All rights reserved.
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