The present work concern an experimental study of gas cleaning by a wet venturi scrubber. The water is introduced before the convergent and streams as a liquid along the venturi walls. Hydrodynamics, mass and thermal mechanisms occurring in the venturi tube and the scrubbing process are investigated in detail. Results show that the maximum density of water vapor resulting of vaporization of the liquid film is observed in the venturi throat. In addition, the collect efficiency increases as the inlet gas velocity and the scrubbing liquid flow rate increase.