Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 325, Issue 3, Pages 166-172Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.05.001
Keywords
activated carbon; adsorption; adsorption efficiency; tobacco; VOC
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Adsorption of volatile organic compounds (VOCs) in cigarette smoke by activated carbons was measured to investigate the correlation between the adsorption efficiencies of the VOCs and pore size and volume of the activated carbons. The adsorption efficiency E is defined by E=(C-i,C-in-C-i,C-out)/C-i,C-in where C-i,C-in and c(i,out) are the concentration of the ith VOC component in cigarette smoke before and after adsorption, respectively. E relates to a weight of activated carbons w which is described by a logarithmic penetration equation, In (1-E) = -Kw (K: constant). The value of K for one smoke constituent increased linearly with the adsorption capacity determined by DR plot, W-0. K was well predicted by the value of the slope, D. of DR plot as K=(a(1)D(2) +a(2)D+a(3))W-0, (a(1), a(2), a(3): constants), and this equation can be applicable to various smoke constituents by substituting the affinity coefficient (beta) of a given adsorbate included in D. Thus, the adsorption efficiency of various smoke constituents for a particular activated carbon is predicted by analyzing W-0 and D for an adsorbate in cigarette smoke. (c) 2008 Elsevier B.V. All rights reserved.
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