A wet-dust collection system that uses foam rather than liquid droplets was developed to remove environmental pollutants from gases emitted from stationary sources. Operational conditions for the formation of a stable foam layer in the dust collector were identified. Over 99.9% of gas containing test powder could be removed when the gas was passed through the system. In absorption experiments on gaseous SO₂ with H₂O₂ as the reactive absorbent, an absorption rate of >99.1% was obtained using the proposed system. Furthermore, in the absence of H₂O₂ and using a surfactant solution instead of only water, a higher absorption rate of SO₂ was achieved with the formation of a foam layer.