標題: A GENERAL EXPRESSION FOR THE TOTAL RELEASE OF DIFFUSANT THROUGH HETEROGENEOUS MEMBRANES
作者: CHEN, JS
ROSENBERGER, F
應用化學系
Department of Applied Chemistry
關鍵字: DIFFUSION;HETEROGENEOUS MEMBRANES;TOTAL RELEASE;LAG TIME;TIME-DEPENDENT BOUNDARY CONDITION
公開日期: 19-Feb-1992
摘要: An expression for the total amount of diffusant Q(t) released into a receiver by diffusion through a heterogeneous membrane is rigorously derived for time-dependent boundary conditions and a position-dependent initial condition. The heterogeneity of the membrane is characterized by a position-dependent diffusivity and partition coefficient. Two examples are given to demonstrate the utility of this general expression. It is shown that the expression for Q(t) proposed by Keister [ J. Membrane Sci., 29 (1986) 333-3441 is only valid when the asymptotic concentration of the diffusant within the membrane is zero.
URI: http://dx.doi.org/10.1016/0376-7388(92)87014-O
http://hdl.handle.net/11536/3517
ISSN: 0376-7388
DOI: 10.1016/0376-7388(92)87014-O
期刊: JOURNAL OF MEMBRANE SCIENCE
Volume: 66
Issue: 2-3
起始頁: 241
結束頁: 246
Appears in Collections:Articles