期刊
WATER RESOURCES AND INDUSTRY
卷 6, 期 -, 页码 64-80出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.wri.2014.07.003
关键词
Tea waste; Alkali treated; Methylene blue; Isotherm; Kinetic; Thermodynamic
资金
- University of Tehran
The adsorption of methylene blue (MB) from aqueous solution by alkali treated Foumanat tea waste (ATFTW) from agriculture biomass was investigated. The adsorbent was characterized by Scanning Electron Microscopy (SEM). Fourier Transform -infrared Spectroscopy (FT-IR) and nitrogen physisorption. FITR results showed complexation and ion exchange appear to be the principle mechanism for MB adsorption. The adsorption isotherm data were fitted to Langmuir, Sips, Redlich-Peterson and Freundlich equations, and the Langmuir adsorption capacity, Q, was found to be 461 mgg(-1). It was found that the adsorption of MB increases by increasing temperature from 303 to 323 K and the process is endothermic in nature. The removal of MB by ATFTW followed pseudo-second order reaction kinetics based on Lagergren equations. Mechanism studies indicated that the adsorption of MB on the ATFTW was mainly governed by external mass transport where particle diffusion was the rate limiting step. (C) 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
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