Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 31, Issue -, Pages 112-117Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2015.06.014
Keywords
Activated carbon (AC); Modified activated carbon (MAC); adsorption; Nicotine; Ammonium persulfate
Funding
- Hubei University of Technology, China
- Natural Science Foundation of Hubei Province [2013CFB024]
- International Science and Technology Cooperation Program of China [2014DFE70070]
- National Basic Research Program of China [2014CB460601]
- National Natural Science Foundation of China [51209190]
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The adsorption of nicotine onto activated (AC) and AC modified (MAC, by contact with ammonium persulfate) can be described well using the Langmuir model with maximum adsorption capacities of 552 and 640 mg g(-1), respectively. Nicotine has high 'hardness' and appears to adsorb most readily on the increased concentration of 'hard' MAC edge functional groups. Adsorption is shown to be exothermic; with enthalpy of -10 and -16 kJ mol(-1) for AC and MAC, respectively. The negative free energy and positive entropy of adsorption indicate a spontaneous process and a strong affinity between aqueous nicotine and AC or MAC. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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