Notice of RetractionAbsorption of H2S Waste Gas Using Combined Absorbent of Pyrolusite and Ferric Sulfate

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The technological conditions of absorption of H₂S using pyrolusite ferric sulfate were studied. In this process, low cost raw materials are used, oxidation absorption of H₂S and regeneration of ferric salt were realized simultaneously, and continuous operation can be achieved. Consequently, appropriate operating conditions were established: Room temperature; Concentration of sulfuric acid is 0.5 mol/L; Ferric concentration is 1.0 mol/L; Concentration of MnO₂ is 3.0g /50mL. Under these conditions, the maximal ratio of absorption of 99.2% can be achieved in discontinuous operation process, and approximately 100% absorption of H₂S can be achieved by multi-absorption in series and addition of pyrolusite and sulfuric acid in continuous operation process.