Effect of oxidative modification of activated carbon for the adsorption behavior of nicotine
Date
2015
Authors
Pi, K.
Xia, M.
Wu, P.
Yang, M.
Chen, S.
Liu, D.
Gerson, A.R.
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Journal article
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Journal of Industrial and Engineering Chemistry, 2015; 31:112-117
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Abstract
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 640mgg-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 -16kJmol-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.
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Copyright 2015 The Korean Society of Industrial and Engineering Chemistry.