A method is described for mixing gas and liquid for gravitational, physical and chemical collection of compounds or particles, based on decreasing of the compounds free mean path in a vessel, and comprising the steps of: gravitational depletion, involving abating compounds and liquid chemical solution drops with higher diameter than higher volume physical deposition, involving the condensation of abated compounds on a wet surface of the vessel chemical adsorption, involving chemical reaction between the abated compounds and the species in the liquid chemical solution.
