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A general Taylor dispersion theory is used to study the electrostatic precipitation of charged particles from a turbulent flow between two parallel plates. The axial particle transport is governed by three constant phenomenological coefficients: the mean particle deposition rate coefficient; mean particle velocity; mean effective particle dispersivity. These transport coefficients are calculated using different models of particle turbulent diffusivity. Particle collection efficiency is explicitly expressed in terms of the calculated transport coefficients by a simple exponential formula comparable with the well-known expression of Deutsch (1922). The computed efficiencies are compared with known analytical solutions . The effect of particle inertia on the effective transport coefficients and the collection efficiency is studied on the basis of Sehmel's (1970) model of particle turbulent diffusivity. It is found that for intermediate values of the characteristic Peclet number the collection efficiency of inertial particles is described by the Deutsch formula. For high Peclet numbers the collection efficiency is independent of the particle diffusivity model and reproduces the solution of Leonard et al. (1980). On the basis of the calculated effective axial transport coefficients a correction factor for the Deutsch formula is proposed. This factor is evaluated in wide ranges of the characteristic Peclet number and particle dimensionless relaxation time. Israel; Reprints. (jhd)