capacity of activated carbon for water-immiscible organic.pdf

Advances in Environmental Research 4Ž. 2000 357᎐362
munication
Predicting humidity effect on adsorption capacity of
activated carbon for water-anic vapors
Shaoying Qia, K. James Hay a,U, Mark P. Calb
. Army Construction Engineering Research Laboratory, Champaign, IL 61826-9005, USA
bDepartment of En¨ironmental Engineering, New Mexico Tech, Socorro, NM 87801, USA
Accepted 10 July 2000
Abstract
This paper presents a simple numerical solution to the method of ManesŽ Proceedings of the Engineering
Foundation Conference Bavaria, West Germany, 1984: 335. developed from the Polanyi adsorption potential theory
to predict the effect of water humidity on the adsorption capacity of activated carbon for a water-anic
vapor. The input parameters for the solution are the pure vapor adsorption isotherms quantified using the Qi, Hay
and RoodŽ. QHR equation in Qi et al. Ž J. Environ. Eng., 124 Ž. 11 ;1998:1130 . for water, and the Dubinin᎐Radushke-
vich equation in DubininŽ. Progress in Surface and Membrane Science, vol. 9, 1975, Academic Press for anic
chemical. The solution employs a simple algorithm of decrement search and requires the least possible number of
iterations in calculation. Predicted pare favorably with the adsorption data for benzene in the relative
humidity range 0᎐90%. This numerical approach is straightforward and better suited than the original gr