期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 215, 期 -, 页码 671-679出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.molliq.2015.12.057
关键词
Low-cost adsorbent; Chromium (VI); Adsorption isotherms; Adsorption kinetics; Treated waste newspaper
资金
- school of public health, Tehran University of Medical Sciences [24577-46-03-92]
In the present study, treated waste newspaper (TWNP) was used to remove chromium(VI) from aqueous solution using batch experiments. The adsorption parameters optimized were: initial Cr(VI) concentration (5, 20, 50 mg/l), contact time (60 min.), adsorbent dose (3.0 g/L), and solution pH (3.0). The experimental data fitted well to Langmuir isotherm (R-2 = 0.98; maximum adsorption capacity 59.88 mg/g.) and pseudo-second-order kinetic model. The rate constant k(2) varied from 0.0019 to 0.0068 at initial Cr (VI) concentration from 5 to 20 mg/L. It was observed that adsorption of Cr(VI) was pH dependent. The percentage removal of Cr(VI) was 59.88 mg/g (64% at pH 3). The results of the present study suggest that TWNP may be used as a low-cost adsorbent for the removal of chromium (VI) from aqueous solutions. (C) 2015 Published by Elsevier B.V.
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