Embodiments of the disclosure include systems and processes for the recovery of sulfur dioxide (SO2) from tail gas of sulfur recovery plant or from flue gas of a power plant, such as flue gas originating from an H2S-containing fuel gas for a gas turbine. SO2-containing gas is dissolved in chilled water and produce SO2-containing chilled water. The SO2-containing chilled is contacted with H2S-containing gas to aqueously react H2S and SO2 and form elemental sulfur. A water stream with the entrained sulfur is routed to a solid-liquid separate, and separated sulfur may be processed or disposed of. The water is recycled and chilled for use in the reaction. Embodiments also include the generation of sulfur dioxide (SO2) from produced sulfur instead of using tail gas or flue gas.