期刊
BIORESOURCE TECHNOLOGY
卷 99, 期 18, 页码 8974-8980出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.05.018
关键词
Mn-impregnated activated carbon; Typha orientalis; Neutral Red; Adsorption; Kinetics
资金
- National Key Technology RD Program [2006BAC10B03]
- National Natural Science Foundation of China-Japan Science and Technology Agency (NSFC-JST) [50721140017]
- National Natural Science Foundation of China [50508019]
Activated carbon was prepared from an inexpensive and renewable carbon source. Typha orientalis, by H3PO4 activation and then impregnated with different Mn salts and tested for its Neutral Red (NR) adsorption capacities. The amount of Mn impregnated in the activated carbon was influenced by the anion species. Impregnation with Mn decreased the surface area, changed the pore size and crystal structure, and introduced more acidic functional groups such as carboxyl, lactone and phenol groups. The optimum adsorption performance for all the activated carbons was obtained at pH 3.7. Mn-Carbon dose of 0.100 g/100 ml solution and contact time 4.5 h. The adsorption isotherms fit the Langmuir isotherm equation. The kinetic data followed the pseudo-second-order model. The thermodynamic parameters indicated that the processes were spontaneous and endothermic. According to these results, the prepared Mn modified activated carbons are promising adsorbents for the removal of Neutral Red from wastewater. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
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