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Adsorptive removal of naphthalenesulfonic acids using wild almond shell activated carbon from aqueous solution
Author(s) -
Thitame Prasad V.,
Shukla Sanjeev R.
Publication year - 2017
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12431
Subject(s) - adsorption , activated carbon , phosphoric acid , chemistry , aqueous solution , endothermic process , freundlich equation , bet theory , chromatography , nuclear chemistry , mass transfer , diffusion , inorganic chemistry , organic chemistry , thermodynamics , physics
Activated carbon was prepared from wild almond shells using phosphoric acid as an activating agent. The BET surface area and the pore volume were found to be 1133.25 m 2 /g and 1.41 cm 3 /g, respectively. Batch adsorption of two naphthalene dye intermediates, H‐ and γ‐acid was carried out using prepared activated carbon. The maximum adsorption capacities were found to be 911 and 809.4 mg/g, respectively, at 65°C. Freundlich isotherm fitted well the equilibrium data, indicating favorable adsorption of both the acids. Adsorption was controlled by the external mass transfer and intraparticle diffusion. Thermodynamic analysis showed that the adsorption was physical, spontaneous, and endothermic in nature. © 2016 American Institute of Chemical Engineers Environ Prog, 36: 38–44, 2017