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Recebido em 19/8/11; aceito em 7/2/12; publicado na web em 15/6/12 This work examines traditional and new routes for removal of H 2 S and other sulfur compounds from spent sufidic caustic (SSC). SH -(hydrogenosulfide) and S 2-(sulfide) ions were quantitatively oxidized at 25 ºC using H 2 O 2 , NaOCl or a spent sulfochromic mixture. SH -/S 2-ions were also removed via reaction with freshly prepared iron or manganese hydroxides, or after passing the SSC through strong basic anion exchange resins (OH -form). The treated caustic solution, as well as iron/manganese hydroxides, removed H 2 S from diesel samples at 25 o C. SSC treatment via strong basic anion-exchange resins produced the treated caustic solution with the highest free alkalinity.

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